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390 | https://simple.wikipedia.org/wiki/ISO%2019011 | ISO 19011 | ISO 19011 is the new global accounting standard, replacing accounting standards that were part of ISO 14001 and ISO 9001. It is the most likely basis for accounting reform which could put an end to accounting scandals.
The standard offers four resources to organizations to "save time, effort and money":
A clear explanation of the principles of management systems auditing.
Guidance on the management of audit programs.
Guidance on the conduct of internal or external audits.
Advice on the competence and evaluation of auditors.
Accounting
19011 |
391 | https://simple.wikipedia.org/wiki/India | India | India (Hindi: ), officially the Republic of India (Hindi: ) and also known as Hindustān or Bhārat within the country, is a country in South Asia. It is the largest country by number of people and seventh largest country by land area. India is a peninsula, bounded by the Indian Ocean on the south, the Arabian Sea on the southwest, and the Bay of Bengal on the southeast. It has six neighbors: Pakistan in the north-west, China, Nepal, and Bhutan in the north, and Bangladesh and Myanmar in the east. Sri Lanka is nearby to the south.
The capital city of India is New Delhi. India has the second largest military force in the world and is also a nuclear weapon state. India's economy became the world's fastest growing in the G20 developing nations during 2014, replacing the People's Republic of China. India's literacy and wealth are also rising. According to New World Wealth, India is the fifth richest country in the world with a total individual wealth of $12.6 trillion. However, it still has many social and economic issues like poverty and corruption. India is a founding member of the World Trade Organisation (WTO), and has signed the Kyoto Protocol.
India has the fifth largest economy by nominal GDP, the third largest by GDP (PPP) and is the fastest growing major economy. India is a nuclear power and has the second largest standing military in the world. India has its own space agency (ISRO) and has done various research throughout the solar system, including sending spacecraft to the Moon, Mars, and Venus. India is also a member of the G20 developing nations, and has been described as a potential superpower due to its rising economy and increase in global influence.
India has the fourth largest number of spoken languages per country in the world, only behind Papua New Guinea, Indonesia, and Nigeria. Most of Indians follow Hinduism but people of different religions such as Buddhism, Sikhism, Islam, and Christianity also live there. The first three religions originated from the Indian subcontinent along with Jainism.
National symbols
The national emblem of India shows four lions standing back-to-back. The lions symbolize power, pride, confidence, and courage. Only the government can use this emblem, according to the State Emblem of India (Prohibition of Improper Use) Act, 2005.
The name India comes from the Greek word, 'Indus. This came from the word sindhu, which, over time, turned into Hind, Hindi, or Hindu. The preferred endonym (the name given to the country by its own people) is "Bhārat" in Hindi and other Indian languages as contrasted with names from outsiders. Some of the national symbols are:
National anthem: Jana Gana Mana
National song: Vande Mataram
National animal: Tiger
National bird: Peacock
National flower: Lotus
National tree: Banyan
National river: Ganges (Ganga)
National Aquatic Animal: Ganges River Dolphin
National fruit: Mango
National heritage animal: Elephant
National heritage bird: Indian eagle
History
One of the oldest language of the world, Tamil, was born in today's India. Which is more than 3000 years old. Later, a king named Chandragupt Maurya built an empire called the Maurya Empire in 300 BC. It made most of South Asia into one whole country. From 180 BC, many other countries invaded India. Even later (100 BC AD 1100), other Indian dynasties (empires) came, including the Chalukyas, Cholas, Pallavas, and Pandyas. Southern India at that time was famous for its science, art, and writing. The Cholas of Thanjavur were pioneers at war in the seas and influenced Malaya, Borneo, Cambodia. The influence of Cholas are still noticeable in Southeast Asia.
Many dynasties ruled India around the year 1000. Some of these were the Mughal, Vijayanagara, and the Maratha empires. In the 1600s, European countries invaded India, and the British controlled most of India by 1856.
In the early 1900s, millions of people peacefully started to protest against British control. One of the people who led the freedom movement was Mahatma Gandhi, who only used peaceful tactics, including a way called "ahimsa", which means "non-violence". On 15 August 1947, India peacefully became free and independent from the British Empire. India's constitution was founded on 26 January 1950. Every year, on this day, Indians celebrate Republic Day. The first official leader (Prime Minister) of India was Jawaharlal Nehru.
After 1947, India had a socialist planned economy. It is one of the founding members of the Non-Aligned Movement and the United Nations. It has fought many wars since independence from Britain, including the wars in 1947-48, 1965, 1971, and 1999 with Pakistan and in 1962 with China. It also fought a war to capture Goa, a Portuguese-built port and a city that was not a part of India until 1961. The Portuguese refused to give it to the country, and so India had to use force and the Portuguese were defeated. India has also done nuclear tests in 1974 and 1998. It is one of the few countries that have nuclear bombs. Since 1991, India has been one of the fastest-growing economies in the world.
Government
India has the most people of any democracy in the world. India's government is divided into three parts: the Legislative (the one that makes the laws, the Parliament), the Executive (the government), and the Judiciary (the one that makes sure that the laws are obeyed, the supreme court).
The legislative branch is made up of the Parliament of India, which is in New Delhi, the capital of India. The Parliament of India is divided into two houses: the upper house, Rajya Sabha (Council of States); and the lower house, Lok Sabha (House of People). The Rajya Sabha has 250 members, and the Lok Sabha has 552 members.
The executive branch is made up of the President, Vice President, Prime Minister, and the Council of Ministers. The President of India is elected for a period of five years. The President can choose the Prime Minister, who has most of the power. The Council of Ministers, such as the Minister of Defence, helps the Prime Minister. Narendra Modi became the Prime Minister of India on 16 May 2014. He is the 19th Prime Minister of India. The president has less power than the prime minister.
The judicial branch is made up of the courts of India, including the Supreme Court. The Chief Justice of India is the head of the Supreme Court. Supreme Court members have the power to stop a law being passed by Parliament if they think that the law is illegal and contradicts (opposes) the Constitution of India. In India, there are also 24 High Courts.
Geography and climate
India is the seventh biggest country in the world. It is the main part of the Indian subcontinent. The countries next to India are Pakistan, Bangladesh, Myanmar, China, Bhutan, and Nepal. It is also near Sri Lanka, an island country. The Andaman and Nicobar Islands, a union territory of India, is near Thailand, Indonesia, and Myanmar.
India is a peninsula, which means that it is surrounded on three sides by water. In the west is the Arabian Sea, in the south is the Indian Ocean, and in the east is the Bay of Bengal. The coastline of India is of about long. The northern part of India has many mountains. The most famous mountain range in India is the Himalayas, which have some of the tallest mountains in the world. There are many rivers in India. The main rivers are the Ganges, the Brahmaputra, the Yamuna, the Godavari, the Kaveri, the Narmada, and the Krishna.
India has different climates. In the South, the climate is mainly tropical, which means it can get very hot in summer and cool in winter. The northern part, though, has a cooler climate, called sub-tropical, and even alpine in mountainous regions. The Himalayas, in the alpine climate region, can get extremely cold. There is very heavy rainfall along the west coast and in the Eastern Himalayan foothills. The west, though, is drier. Because of some of the deserts of India, all of India gets rain for four months of the year. That time is called the monsoon. That is because the deserts attract water-filled winds from the Indian Ocean, which give rain when they come into India. When the monsoon rains come late or not so heavily, droughts (when the land dries out because there is less rain) are possible. Monsoons normally come around July–August.
Military
The Indian Armed Forces is the military of India. It is made up of an Army, Navy and Air Force. There are other parts like Paramilitary and Strategic Nuclear Command.
The President of India is the Commander-in-Chief. However, it is managed by the Ministry of Defence. In 2010, the Indian Armed Forces had 1.32 million active personnel. This makes it one of the largest militaries in the world.
The Indian Army is becoming more modern by buying and making new weapons. It is also building defenses against missiles of other countries. In the years 2018-2022, India imported more arms than any other nation in the world. Since its independence in 1947, India fought four wars with Pakistan and a war with China.
Indian states
For administration purposes, India has been divided into smaller pieces. Most of these pieces are called states, some are called union territories. States and union territories are different in the way they are represented. Most union territories are ruled by administrators (called Lieutenant Governors) sent by the central government. All the states, and the territories of Delhi, and Puducherry elect their local government themselves. In total, there are twenty-eight states and eight union territories.States:Union territories:'''
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Border Disputes
There are disputes about certain parts of the Indian borders. Countries do not agree on where the borders are. Pakistan and China do not recognise the disputed territory of Jammu and Kashmir. The Indian government claims it as an Indian state. Similarly, the Republic of India does not recognise the Pakistani and Chinese parts of Kashmir.
In 1914, British India and Tibet agreed on the McMahon Line, as part of the Simla Accord. In July 1914, China withdrew from the agreement. Indians and Tibetans see this line as the official border. China does not agree, and both mainland China and Taiwan do not recognize that Arunachal Pradesh belongs to India. According to them, it is a part of South Tibet, which belongs to China.
Economy
The economy of the country is among the world's fastest growing. It is the 7th largest in the world with a nominal GDP of $2,250 billion (USD), and in terms of PPP, the economy is 3rd largest (worth US$8.720 trillion). The growth rate is 8.25% for fiscal 2010. However, that is still $3678 (considering PPP) per person per year. India's economy is based mainly on:
Service sector: 43%
Industries: 41%
Information technology: 7%
Farming: 7%
Outsourcing: 2%.
India's economy is diverse. Major industries include automobiles, cement, chemicals, consumer electronics, food processing, machinery, mining, petroleum, pharmaceuticals, steel, transportation equipment, and textiles.
However, despite economic growth, India continues to suffer from poverty. 27.5% of the population was living in poverty in 2004–2005. In addition, 80.4% of the population live on less than US$2 a day, which was lowered to 68% by 2009.
People
There are 1.4 billion people living in India. In 2023, India passed China to become the world's most populous country. About 65% of Indians live in rural areas, or land set aside for farming. The largest cities in India are Mumbai, Kolkata, Delhi, Chennai, Bangalore, Hyderabad, and Ahmedabad. Hindi and English are Official languages of India. India has 23 officially recognised languages. Altogether, 1,625 languages are spoken in India.
Languages
There are many different languages and cultures in India. There are two main language families in India, the Indo-Aryan and the Dravidian languages. About 69% of Indians speak an Indo-Arayan language, and about 26% speak a Dravidian language. Other languages spoken in India come from the Austro-Asiatic group. Around 5% of the people speak a Tibeto-Burman language.
Hindi is the official language in India with the largest number of speakers. It is the official language of the union. Native speakers of Hindi represent about 41% of the Indian population (2001 Indian census). English is also used, mostly for business and in administration. It has the status of a 'subsidiary official language'. The constitution also recognises 21 other languages. Either many people speak those languages, or they have been recognized to be very important for Indian culture. The number of dialects in India is as high as 1,652.
In the south of India, many people speak Kannada, Telugu, Tamil and Malayalam. In the north, many people speak Chhattisgarhi, Punjabi, Bengali, Gujarati, and Marathi, Odia, and Bihari.Robert McHenry, "The New Encyclopaedia Britannica", Encyclopædia Britannica, 1993.
India has 23 official languages. Its constitution lists the name of the country in each of the languages. Hindi and English (listed in boldface) are the "official languages of the union" (Union meaning the Federal Government in Delhi); Tamil, Sanskrit, Telugu, Kannada, Malayalam, and Odia are officially the "classical languages of India."
Culture
Cave paintings from the Stone Age are found across India. They show dances and rituals and suggest there was a prehistoric religion. During the Epic and Puranic periods, the earliest versions of the epic poems Ramayana and Mahabharata were written from about 500–100 BCE, although these were orally transmitted for centuries before this period. Other South Asian Stone Age sites apart from Pakistan are in modern India, such as the Bhimbetka rock shelters in central Madhya Pradesh and the Kupgal petroglyphs of eastern Karnataka, contain rock art showing religious rites and evidence of possible ritualised music.
Several modern religions are linked to India, namely modern Hinduism, Jainism, Buddhism and Sikhism. All of these religions have different schools'' (ways of thinking) and traditions that are related. As a group they are called the Eastern religions. The Indian religions are similar to one another in many ways: The basic beliefs, the way worship is done and several religious practices are very similar. These similarities mainly come from the fact that these religions have a common history and common origins. They also influenced each other.
The religion of Hinduism is the main faith followed by 79.80% of people in the Republic of India; Islam – 14.23%; Christianity – 2.30%; Sikhism – 1.72%; Buddhism – 0.70% and Jainism – 0.37%.
Technology
India sent a spacecraft to Mars for the first time in 2014. That made it the fourth country and first Asian country to do so, successfully. It was called the Mars Orbiter Mission.
ISRO launched 104 satellites in a single mission to create a world record. India became the first nation in the world to have launched over a hundred satellites in one mission. That was more than the 2014 Russian record of 37 satellites in a single launch.
Pop culture
India has the largest movie industry in the world. It is based in Bombay which is now known as Mumbai, the industry is also known as Bollywood. It makes 1,000 movies a year, about twice as many as Hollywood.
Sports
Indians have excelled in hockey. They have also won eight gold, one silver, and two bronze medals at the Olympic games. However, cricket is the most popular sport in India. The Indian cricket team won the 1983 and 2011 Cricket World Cup and the 2007 ICC World Twenty20. They shared the 2002 ICC Champions Trophy with Sri Lanka and won the 2013 ICC Champions Trophy. Cricket in India is controlled by the Board of Control for Cricket in India or BCCI. Domestic tournaments are the Ranji Trophy, the Duleep Trophy, the Deodhar Trophy, the Irani Trophy, and the Challenger Series. There is also the Indian cricket league and Indian premier league Twenty20 competitions.
Tennis has become popular due to the victories of the India Davis Cup team. Association football is also a popular sport in northeast India, West Bengal, Goa and Kerala. The Indian national football team has won the South Asian Football Federation Cup many times. Chess, which comes from India, is also becoming popular. This is with the increase in the number of Indian Grandmasters. Traditional sports include kabaddi, kho kho, and gilli-danda, which are played throughout India.
Notes
References
Other websites
Government
Official entry portal of the Government of India
Official directory of Indian Government websites
Gondwana
1947 establishments in Asia
Commonwealth member states |
393 | https://simple.wikipedia.org/wiki/Insult | Insult | An insult is a description of someone that will offend them. It may or may not be true. It is called derogatory language. Terms like foolish, stupid, idiot and moron are insults, because they say that a person's mind is not quick or smart.
Insulting someone's mother directly is a serious insult in many cultures.
Ritual insults are part of many cultures. For example, they can be found in sports and military training. They are also very common in jargons. For example, the word newbie is a part of net jargon. Calling someone a newbie is usually insulting.
One should be very careful when using new words to describe others.
Reason
Usually, someone insults others because they want to feel like they are better or have more power (influence) than the people they insult. They may want this because they are actually afraid that they are worse or less powerful than the people they are insulting.
Effects
When someone is insulted, their pride is hurt. They may want to fight back by insulting the person who insulted them, or by telling someone who is older.
Figures of speech |
394 | https://simple.wikipedia.org/wiki/Immunology | Immunology | Immunology is the study of the immune system. The immune system is the parts of the body which work against infection and parasitism by other living things. Immunology deals with the working of the immune system in health and diseases, and with malfunctions of the immune system.
An immune system is present in all plants and animals. We know this because biologists have found genes coding for toll-like receptors in many different metazoans. These toll-like receptors can recognise bacteria as 'foreign', and are the starting-point for immune reactions. The type of immunity which is triggered by the toll-like receptors is called innate immunity. This is because it is entirely inherited in our genome, and is fully working as soon as our tissues and organs are properly developed.
Vertebrates, and only vertebrates, have a second type of immunity. This is called adaptive immunity, because it 'remembers' previous infections. Then, if the same infection occurs again, the reaction is much stronger and faster. This immunological memory "confers a tremendous survival advantage" and with it vertebrates "can survive over a long lifetime in a pathogen-filled environment".
Types of immunity in vertebrates
Innate immune response
The innate immune system is usually means all of the cells and systems that does not have to be exposed to a particular pathogen before they can work.
Innate immunity starts with the skin, which is an excellent barrier to infection.
Adaptive immune response
The adaptive immune system includes cells and systems that do require previous exposure to a pathogen. It explains the unique ability of the mammalian immune system to remember previous infections and mount a rapid and robust reaction to secondary infections. This immunological memory is due to the biology of T-cells and B-cells.
Other aspects of immunity
Vaccines boost the acquired immune system by offering weak forms of infection that the body can fight off. The system remembers how to do it again when a stronger infection happens. If the vaccine works, the body can then fight off a serious infection.
The distribution of vaccines and other immune system affecting cures can be considered another level of acquired immune system, one governed by access to vaccination and medicine in general. The intersection of this with the spread of disease (as studied in epidemiology) is part of the field of public health.
Errors and weaknesses
Errors of the immune system may cause damage. In autoimmune diseases, the body attacks parts of itself because the system mistakes some parts of the body as 'foreign'. Some kinds of arthritis are caused this way.
Sometimes serious pathogens slip in because their surface is disguised as something the host cell walls can accept. That is how viruses work. Once inside a cell, their genetic material controls the cell. Infections like HIV get in this way, and then attack cells which are the basis of the immune system. Artificial means are often used to restore immune system function in an HIV-challenged body, and prevent the onset of AIDS. This is one of the most complex issues in immunology as it involves every level of that system. This research during the 1980s and 1990s radically changed the view of the human immune system and its functions and integration in the human body.
History of immunology
Immunology is a science that examines the structure and function of the immune system. It originates from medicine and early studies on the causes of immunity to disease. The earliest known mention of immunity was during the plague of Athens in 430 BC. Thucydides (460–395 BC) noted that people who had recovered from a previous bout of some diseases could nurse the sick without contracting the illness a second time.
In the 18th century, Pierre-Louis Moreau de Maupertuis made experiments with scorpion venom and observed that certain dogs and mice were immune to this venom. This and other observations of acquired immunity led to Louis Pasteur (1822–1895) developing vaccination and the germ theory of disease. Pasteur's theory was in direct opposition to contemporary theories of disease, such as the miasma theory. It was not until the proofs Robert Koch (1843–1910) published in 1891 (for which he was awarded a Nobel Prize in 1905) that microorganisms were confirmed as the cause of infectious disease. Viruses were confirmed as human pathogens in 1901, when the yellow fever virus was discovered by Walter Reed (1851–1902).
Immunology made a great advance towards the end of the 19th century, through rapid developments, in the study of humoral immunity and cellular immunity. Particularly important was the work of Paul Ehrlich (1854–1915), who proposed the side-chain theory to explain the specificity of the antigen-antibody reaction. The Nobel Prize for 1908 was jointly awarded to Ehrlich and the founder of cellular immunology, Ilya Mechnikov (1845–1916).
The simplest form of immunity is the DNA restriction system in bacteria that prevents infection by bacteriophages.
References
Related pages
Lymphatic system
White blood cell |
395 | https://simple.wikipedia.org/wiki/Infinity | Infinity | Infinity () is about things that never end. It is written in a single digit. Infinity means many different things, depending on when it is used. The word is from Latin origin, meaning "without end". Infinity goes on forever, so sometimes space, numbers, and other things are said to be 'infinite', because they never come to a stop.
Infinity is usually not an actual number, but it is sometimes used as one. Infinity often says how many there is of something, instead of how big something is. For example, there are infinitely many whole numbers (called integers), but there is no integer which is infinitely big. But different kinds of math have different kinds of infinity. So its meaning often changes.
There are two kinds of infinity: potential infinity and actual infinity. Potential infinity is a process that never stops. For example, adding 10 to a number. No matter how many times 10 is added, 10 more can still be added. Actual infinity, on the other hand, refers to objects that are accepted as infinite entities (such as transfinite numbers).
Infinity in Mathematics
Mathematicians have different sizes of infinity and three different kinds of infinity.
Counting infinity
The number of things, beginning with 0, 1, 2, 3, ..., to include infinite cardinal numbers. There are many different cardinal numbers. Infinity can be defined in one of two ways: Infinity is a number so big that a part of it can be of the same size; Infinity is larger than all of the natural numbers. There is a smallest infinite number, countable infinity. It is the counting number for all of the whole numbers. It is also the counting number of the rational numbers. The mathematical notation is the Hebrew letter aleph with a subscript zero; . It is spoken "aleph naught".
It was a surprise to learn that there are larger infinite numbers. The number of real numbers, that is, all numbers with decimals, is larger than the number of rational numbers, the number of fractions. This shows that there are real numbers which are not fractions. The smallest infinite number greater than is (aleph one). The number of mathematical functions is the next infinite cardinal number, .
And these numbers, called aleph numbers, go on without end.
Ordering infinity
A different type of infinity are the ordinal numbers, beginning "first, second, third, ...". The order "first, second, third, ..." and so on to infinity is different from the order ending "..., third, second, first". The difference is important for mathematical induction. The simple first, second, third, ... has the mathematical name: the Greek letter omega with subscript zero: . (Or simply omega .) The infinite series ending "... third, second, first" is .
The real line and complex plane
The third type of infinity has the symbol . This is treated as addition to the real numbers or the complex numbers. It is the result of division by zero, or to indicate that a series is increasing (or decreasing) without bound. The series 1, 2, 3, ... increases without upper bound. This is written: the limit is . In calculus, the integral over all real numbers is written:
The arithmetic of infinity
Each kind of infinity has different rules.
Addition, multiplication, exponentiation
Addition with "alephs" is commutative.
Multiplication with "alephs" is commutative.
.
. Addition with "omegas" is not commutative.
. Multiplication with "omegas" is not commutative.
Subtraction, division
Division by infinity (for example, with omegas or alephs) is not meaningful. Subtraction with infinity is not meaningful.
Related pages
Countable set
Eternity
Hilbert's paradox of the Grand Hotel
Riemann sphere, complex plane with a point at infinity
Uncountable set
References
Other websites
A Crash Course in the Mathematics of Infinite Sets , by Peter Suber. From the St. John's Review, XLIV, 2 (1998) 1-59. The stand-alone appendix to Infinite Reflections, below. A concise introduction to Cantor's mathematics of infinite sets.
Infinite Reflections , by Peter Suber. How Cantor's mathematics of the infinite solves a handful of ancient philosophical problems of the infinite. From the St. John's Review, XLIV, 2 (1998) 1-59.
Infinity, Principia Cybernetica
Hotel Infinity
The concepts of finiteness and infinity in philosophy
Numbers
Mathematics |
400 | https://simple.wikipedia.org/wiki/January | January | January (Jan.) is the first month of the year in the Julian and Gregorian calendars, coming between December (of the previous year) and February (of the current year). It has 31 days.
January begins on the same day of the week as October in common years, and April and July in leap years. January ends on the same day of the week as February and October in common years, and July in leap years.
The Month
January is named for Janus, the Roman god of doors and gates.
January and February were put on the calendar after all the other months. This is because in the original Roman calendar, winter did not have months. Although March was originally the first month, January became the new first month because that was when people chose the new consuls (Roman leaders). The month has 31 days.
January is a winter month in the Northern Hemisphere and a summer month in the Southern Hemisphere. In each hemisphere, it is the seasonal equivalent of July in the other. Perihelion, the point in its orbit where the Earth is closest to the Sun, also occurs in this month, between January 2 and January 5. January is the only month of the year that always has a "twin" - a month that both begins and ends on the same day of the week as it does. In a common year, this is October, and in a leap year, July.
January begins on the same day of the week as October in common years and on the same day of the week as April and July in leap years. January ends on the same day of the week as February and October in common years and on the same day of the week as July in leap years.
Every year, January both starts and finishes on the same day of the week as May of the previous year, as each other's first and last days are exactly 35 weeks (245 days) apart.
In common years immediately before other common years, January starts on the same day of the week as April and July of the following year, and in leap years and years immediately before that, September and December of the following year. In common years immediately before other common years, January finishes on the same day of the week as July of the following year, and in leap years and years immediately before that, April and December of the following year.
January's flower is the carnation with its birthstone being the garnet.
The first day of January is called New Year's Day. It is said that it became this date when Roman consuls took office on this day in 153 BC. Different calendars across Europe made this the start of the New Year at different times, as some observed it on March 25.
Reaching over from December, the Christmas season in Christianity also extends into this month. Eastern churches celebrate Christmas on January 6 or January 7, and Epiphany on January 18 or January 19 - In Western Christianity this occurs on January 6, with Christmas occurring on December 25.
January 1 is celebrated the Solemnity of Mary, the Mother of God, that is a feast day of precept of the Blessed Virgin Mary.
Events
Fixed Events
January 1 - New Year's Day
January 1 - Solemnity of Mary, the Mother of God
January 1 - World Day of Peace
January 1 - Founding Day (Republic of China)
January 1 - Independence Day in Brunei, Haiti and Sudan
January 1 - Triumph of the Revolution (Cuba)
January 1 - Constitution Day (Italy)
January 2 - New Year's Day Bank Holiday (Scotland)
January 2 - Ancestry Day (Haiti)
January 2 - Berchtold's Day (Switzerland, Liechtenstein, Alsace
January 3 - Statehood Day (Alaska)
January 4 - Independence Day (Burma)
January 4 - Day of the Fallen Against Colonial Repression (Angola)
January 4 - Day of the Martyrs (Democratic Republic of the Congo)
January 5 - Twelfth Night in Western Christianity - night to January 6
January 6 - Epiphany in Western Christianity.
January 6 - Christmas in the Armenian Apostolic Church
January 7 - Christmas in Eastern Orthodox Christianity.
January 7 - Tricolour Day (Italy)
January 7 - Victory from Genocide Day (Cambodia)
January 8 - Commonwealth Day (Northern Mariana Islands)
January 8 - Celebration of Elvis Presley's birthday at Graceland
January 8 - Kim Jong-un's birthday (North Korea)
January 9 - Martyrs' Day (Panama)
January 11 - Kagami Biraki (Japan)
January 11 - Republic Day (Albania)
January 11 - Day of National Unity (Nepal)
January 12 - Memorial Day (Turkmenistan)
January 12 - National Youth Day (India)
January 12 - Zanzibar Revolution Day (Tanzania)
January 13 - Korean American Day
January 13 - Old New Year (parts of Eastern Europe)
January 13 - St. Knut's Day (Norway, Finland, Sweden)
January 14 - New Year's Day (Eastern Orothodox Church)
January 14 - National Flag Day in Georgia
January 14 - National Forest Conservation Day (Thailand)
January 15 - Armed Forces Day (Nigeria)
January 15 - Army Day (India)
January 15 - Tree Planting Day (Egypt)
January 16 - Teacher's Day (Thailand)
January 16 - Flag Day (Israel)
January 17 - Roman Catholic feast day of St. Anthony
January 18 - Royal Thai Armed Forces Day
January 18 - Revolution Day (Tunisia)
January 18 - World Religion Day
January 19 - Epiphany in Eastern Orthodox Christianity
January 20 - Armed Forces Day (Mali)
January 20 - Martyrs' Day (Azerbaijan)
January 20 - Inauguration Day (United States) - newly elected US president takes office in a year after a leap year (last in 2021, next in 2025)
January 21 - Flag Day (Quebec)
January 21 - Christian feast day of St. Agnes.
January 22 - Wellington Anniversary (New Zealand)
January 22 - Reunion Day (Ukraine)
January 23 - National Pie Day (United States)
January 23 - Bounty Day (Pitcairn Island)
January 24 - Feast Day of Our Lady of Peace (Roman Catholicism)
January 24 - Unification Day (Romania)
January 25 - Burns Night (Scotland and Scottish communities), celebrating the birthday of Scottish poet Robert Burns
January 25 - Dydd Santes Dwynwen (Welsh equivalent of Valentine's Day)
January 25 - National Voters Day (India)
January 25 - Tatiana Day (Russia)
January 26 - Australia Day
January 26 - Republic Day (India)
January 26 - Duarte Day (Dominican Republic)
January 26 - Liberation Day (Uganda)
January 27 - Holocaust Memorial Day
January 28 - Army Day (Armenia)
January 28 - EU Data Privacy Day
January 28 - Unofficial day commemorating Charlemagne by some Christians
January 30 - Martyrs' Day (India)
January 30 - School Day of Non-Violence and Peace (Spain)
January 31 - Independence Day (Nauru)
Month-long or Moveable Events
Coming of Age Day (Japan), second Monday in January
Martin Luther King, Jr. Day (United States), third Monday in January, commemorating civil rights activist Martin Luther King, Jr., who was born on January 15.
Chinese New Year (between January 21 and February 21)
Australian Open - One of the major Grand Slam tennis tournaments. Starts between January 13 and January 19, ends between January 26 and February 1.
Auckland Anniversary (New Zealand) on a Monday between January 26 and February 1.
Weight Loss Awareness Month (United States)
National Mentoring Month (United States)
Selection of Historical Events
January 1, 153 BC - Roman consuls are said to have taken office on this day for the first time.
January 1, 1801 - The United Kingdom is created, with the inclusion of Ireland.
January 1, 1804 - Haiti becomes the second independent country in the Americas, after the US.
January 1, 1901 - Australia is given self-government.
January 1, 1956 - Sudan becomes independent.
January 1, 1959 - Fidel Castro takes over in Cuba.
January 1, 1962 - Samoa becomes independent.
January 1, 1984 - Brunei becomes independent.
January 1, 2002 - The Euro currency comes into use in 12 EU countries.
January 2, 1492 - Spanish Reconquista: Granada, the last Moorish stronghold, surrenders.
January 3, 1868 - Meiji Restoration in Japan.
January 3, 1959 - Alaska becomes the 49th US State.
January 4, 1948 - Burma becomes independent.
January 4, 2010 - The world's tallest building, the Burj Khalifa in Dubai, opens.
January 5, 1066 - Edward the Confessor, King of England, dies.
January 6, 1066 - Harold Godwinson is crowned King of England.
January 7, 1610 - Galileo Galilei discovers Jupiter's four Galilean moons - Io, Callisto, Ganymede and Europa.
January 7, 1979 - The Khmer Rouge in Cambodia is overthrown by Vietnamese troops.
January 7, 1989 - Japanese Emperor Hirohito dies, aged 87.
January 7, 2015 - Charlie Hebdo shooting in Paris.
January 8, 1642 - Galileo Galilei dies.
January 8, 1912 - The African National Congress is founded.
January 8, 1935 - Elvis Presley is born.
January 10, 1863 - The first section of the London Underground opens.
January 12, 2010 - The 2010 Haiti earthquake causes many deaths and destruction across Haiti.
January 13, 1915 - The Avezzano earthquake in Italy kills 29,800 people.
January 13, 1935 - Most voters in Saarland choose to be part of Germany.
January 14, 1954 - Marilyn Monroe marries Joe DiMaggio.
January 14, 1972 - Margrethe II of Denmark becomes the first Danish Queen since 1412.
January 15, 1929 - Civil rights leader Martin Luther King, Jr. is born in Atlanta, Georgia, US.
January 15, 2001 - Wikipedia goes online.
January 15, 2009 - US Airways Flight 1549 is safely landed on the Hudson River in New York City by Chesley Sullenberger, after experiencing difficulties shortly after take-off.
January 16, 2006 - Ellen Johnson-Sirleaf of Liberia becomes the first female President in Africa.
January 17, 1893 - American and European sugar planters overthrow the government of Queen Liliuokalani of Hawaii.
January 17, 1912 - Robert Falcon Scott's expedition reaches the South Pole over a month after that of Roald Amundsen.
January 17, 1991 - Operation Desert Storm in the Gulf War.
January 17, 1995 - The Great Hanshin earthquake strikes Japan, mainly the city of Kobe, killing over 6,000 people.
January 18, 1778 - James Cook reaches the Hawaiian Islands.
January 20, 1936 - King George V of the United Kingdom dies, leaving the throne to Edward VIII of the United Kingdom, who lasts less than 11 months in the post.
January 20, 2009 - Barack Obama becomes the first African American President of the United States.
January 21, 1793 - King Louis XVI of France is executed by guillotine.
January 22, 1901 - Queen Victoria dies aged 81, ending Britain's Victorian Era.
January 22, 1968 - Apollo 5 lifts off, carrying the first lunar module.
January 23, 1960 - In the Bathyscaphe Trieste, Jacques Piccard and Don Walsh, dive to the deepest point of the Pacific Ocean, the Challenger Deep in the Mariana Trench.
January 24, 41 - Roman Emperor Caligula is assassinated by the Praetorian Guard.
January 24, 1965 - British statesman Winston Churchill dies.
January 24, 1986 - Voyager 2 flies by the planet Uranus.
January 25, 1919 - The League of Nations is founded.
January 25, 2011 - The 2011 Egyptian protests begin.
January 26, 1788 - The first British fleet arrives in what is now Sydney Harbour, Australia.
January 26, 1950 - India becomes a Republic.
January 26, 2020 - NBA legend Kobe Bryant, his 13-year-old daughter Gianna and seven others are killed in a helicopter crash in Calabasas, California.
January 27, 1945 - The Red Army liberates Auschwitz.
January 27, 1967 - US astronauts Gus Grissom, Edward White and Roger Chaffee are killed in a fire while testing the Apollo 1 spacecraft.
January 28, 1935 - Iceland becomes the first country to legalize abortion.
January 28, 1986 - The Space Shuttle Challenger explodes shortly after take-off from Cape Canaveral, Florida, killing all seven astronauts on board.
January 29, 1996 - Venice's La Fenice opera house is destroyed by fire.
January 30, 1649 - King Charles I of England is executed.
January 30, 1933 - Adolf Hitler comes to power in Germany.
January 30, 1948 - Indian independence and non-violence campaigner Mahatma Gandhi is shot dead by a Hindu extremist in Delhi.
January 31, 1968 - Nauru becomes independent from Australia.
January 31, 1990 - Moscow's first McDonald's restaurant opens.
Trivia
January is named after the Roman God Janus, who was the Roman God of doors and gates.
January and July are the only pair of 31-day month's that are exactly six months apart. In the English language, they are also the only pair of months to both begin and end with the same letters (J and Y respectively).
The star signs for January are Capricorn (December 22 to January 20) and Aquarius (January 21 to February 19).
It is the coldest month in the Northern Hemisphere, and the warmest in the Southern Hemisphere.
It is one of three months in the English language to begin with "J", along with June and July, but unlike the latter two, does not have a "U" as a second letter.
References
01 |
401 | https://simple.wikipedia.org/wiki/June | June | June (Jun.) is the sixth month of the year in the Julian and Gregorian calendars, coming between May and July. It has 30 days. In Sweden in 1732 the month had 31 days. June is named for the Roman goddess Juno, the wife of Jupiter.
June never begins on the same day of the week as any other month, but always ends on the same day of the week as March.
The Month
June comes between May and July and is the sixth month of the year in the Gregorian calendar. It is one of the four months to have 30 days.
No other month of any year begins on the same day of the week as June; this month and May are the only two months with this property. June ends on the same day of the week as March every year, as each other's last days are 13 weeks (91 days) apart.In common years, June starts on the same day of the week as September and December of the previous year, and in leap years, April and July of the previous year. In common years, June finishes on the same day of the week as September of the previous year, and in leap years, April and December of the previous year.
Every year, June starts on the same day of the week as February of the following year, as each other's first days are exactly 35 weeks (245 days) apart. In years immediately before common years, June starts on the same day of the week as March and November of the following year, and in years immediately before leap years, August of the following year. In years immediately before common years, June finishes on the same day of the week as August and November of the following year, and in years immediately before leap years, May of the following year.
June is one of two months to have a solstice (the other is December, its seasonal equivalent in both hemispheres), and in this month the Tropic of Cancer in the Northern Hemisphere is turned towards the Sun, meaning that June 20 or June 21 is the Northern Summer Solstice and the Southern Winter Solstice. This means that this date would have the most daylight of any day in the Northern hemisphere, and the least in the Southern Hemisphere. There are 24 hours of daylight at the North Pole and 24 hours of darkness at the South Pole.
Events in June
The solstice occurs around June 21, but it may occur on either the 20th or the 22nd. It is the summer solstice in the northern hemisphere and the winter solstice in the southern hemisphere.
Midsummer is celebrated in Sweden on the third Friday in June.
Father's Day is celebrated in the United States on the third Sunday in June.
Gay pride celebrations happen in many countries, in honour of the Stonewall riots.
World Environment Day is celebrated on June 5.
World Ocean Day is celebrated on June 8.
June Holiday (Lá Saoire i mí Mheitheamh) in the Republic of Ireland is celebrated on June 1
Queen's Official Birthday in New Zealand, Cook Islands and Western Australia is celebrated on June 1
Western Australia Day is celebrated on June 1
Global Running Day is celebrated on June 3
World bicycle day is celebrated on June 3
Labour Day in the Bahamas is celebrated on June 5
National Doughnut Day is celebrated on June 5
National Trails Day in the United States is celebrated on June 5
Armed Forces Day in Canada is celebrated on June 7
Children's Day in the United States is celebrated on June 7
Father's Day in Lithuania and Switzerland is celebrated on June 7
National Cancer Survivors Day in the United States is celebrated on June 7
Teacher's Day in Hungary is celebrated on June 7
The Seamen's Day in Iceland is celebrated on June 7
Queen's Official Birthday in Papua New Guinea, Solomon Islands and Australia, except Western Australia is celebrated on June 8
Seersucker Thursday in the United States is celebrated on June 11
China's Cultural Heritage Day in China is celebrated on June 13
National Day in Montserrat, Pitcairn Islands, Saint Helena, South Georgia and South Sandwich Islands, Tristan da Cunha in the United Kingdom is celebrated on June 13
Queen's Official Birthday in the United Kingdom and Tuvalu is celebrated on June 13
Canadian Rivers Day is celebrated on June 14
Father's Day in Austria and Belgium is celebrated on June 14
Mother's Day in Luxembourg is celebrated on June 14
Queen's Official Birthday in the Norfolk Island is celebrated on June 15
World Bisexuality Awareness Day in the United States is celebrated on June 15
National Flip Flop Day in the United States is celebrated on June 19
International Surfing Day is celebrated on June 20
International Yoga Day is celebrated on June 20
World Music Day is celebrated on June 20
Father's Day in Afghanistan, Albania, Antigua, Barbuda, Argentina, Aruba, Bahamas, Bahrain, Bangladesh, Barbados, Belize, Bermuda, Brunei, Cambodia, Canada, Chile, Colombia, Costa Rica, Cuba, Curaçao, Cyprus, Czech Republic, Dominica, Ecuador, Ethiopia, France, Ghana, Greece, Guatemala, Guyana, Hong Kong, Hungary, India, Ireland, Jamaica, Japan, Kenya, Kosovo, Kuwait, Laos, Macau, Madagascar, Malaysia, Maldives, Malta, Mauritius, Mexico, Mozambique, Namibia, Netherlands, Nigeria, Oman, Pakistan, Panama, Paraguay, People's Republic of China, Peru, Philippines, Qatar, Saint Lucia, Saint Vincent and the Grenadines, Saudi Arabia, Singapore, Slovakia, South Africa, Sri Lanka, Suriname, Trinidad and Tobago, Tunisia, Turkey, United Kingdom, United States, Venezuela, Vietnam, Zambia and Zimbabwe is celebrated on June 21
National Bomb Pop Day in the United States is celebrated on June 25
Take Your Dog to Work Day in the United Kingdom and United States is celebrated on June 26
Armed Forces Day in the United Kingdom is celebrated on June 27
Inventors' and Rationalizers' Day in Russia is celebrated on June 27
Veterans Day in the Netherlands is celebrated on June 27
Father's Day in Haiti is celebrated on June 28
Log Cabin Day in Michigan, United States is celebrated on June 28
Mother's Day in Kenya is celebrated on June 28
Selection of Historical Events
June 1, 1794: French Revolutionary Wars: The battle of the Glorious First of June is fought, the first naval engagement between Britain and France.
June 2, 1953: Coronation of Queen Elizabeth II of the United Kingdom.
June 3, 1965: The launch of Gemini 4, the first multi-day space mission by a NASA crew. June 4, 1783: The Montgolfier brothers publicly demonstrate their montgolfière (hot air balloon).
June 5, 1837: Houston is incorporated by the Republic of Texas.
June 6, 1844: The Young Men's Christian Association is founded in London.
June 7, 1942: World War II: The Battle of Midway ends in American victory.
June 8, 1949: George Orwell's Nineteen Eighty-Four is published.
June 9, 1944: World War II: Tulle massacre
June 10, 2003: The Spirit rover is launched for NASA's Mars Exploration mission
June 11, 2010: 2010 FIFA World Cup (first African FIFA)
June 12, 2018: 2018 North Korea-United States Summit
June 13, 1983: Pioneer 10 becomes the first man-made object to leave the central Solar System
June 25, 1950: Korean War starts.
June 30, 1908: Tunguska event.
Trivia
June is one of two months that never begins on the same day of the week as any other months within any calendar year. (May is the other)
The months of June and July both start with the "Ju" letter combination in the English language, and in some languages have only one letter's difference between their names.
June 1 is the only day in June to start within the fifth twelfth of the calendar year.
June's flower is the Rose.
Its birthstone is the pearl.
The Zodiac signs for June are Gemini (May 21 – June 20) and Cancer (June 21 – July 21).
At the North Pole, the Sun does not set in June; at the South Pole, it does not rise.
06 |
402 | https://simple.wikipedia.org/wiki/July | July | July (Jul.) is the seventh month of the year in the Gregorian calendar, coming between June and August. It has 31 days. July was named after Julius Caesar. The halfway point of the year is either on July 2 or in the night of July 1-2.
July always begins on the same day of the week as April, and additionally, January in leap years. July does not end on the same day of the week as any other month in common years, but ends on the same day of the week as January in leap years.
The Month
In each hemisphere, it is the seasonal equivalent of January in the other hemisphere. In the North, it is summer and in the South it is winter.
In the Northern Hemisphere, July is often the warmest month of the year, and major sporting events and music festivals are held around this time. In the Southern Hemisphere, it is a winter month, with the coldest-recorded temperature having been measured in Antarctica in this month.
July begins on the same day of the week as April every year and on the same day of the week as January in leap years. No other month in common years ends on the same day of the week as July, but July ends on the same day of the week as January in leap years.
In common years, July starts on the same day of the week as October of the previous year, and in leap years, May of the previous year. In common years, July finishes on the same day of the week as February and October of the previous year, and in leap years, May of the previous year. In common years immediately after other common years, July both starts and finishes on the same day of the week as January of the previous year.
In years immediately before common years, July starts on the same day of the week as September and December of the following year, and in years immediately before leap years, June of the following year. In years immediately before common years, July finishes on the same day of the week as April and December of the following year, and in years immediately before leap years, September of the following year.
July's flower is a variety of the water lily. Its birthstone is the ruby. The meaning for the birthstone ruby is contented mind. Astrological signs for July are Cancer (June 21 - July 21) and Leo (July 22 - August 21).
In the old Roman calendar, July was called Quintilis, meaning Fifth Month, because, in the old calendar, the year began in March. Augustus later renamed it July in honor of Julius Caesar, whose birthday was in this month. Augustus later also named the following month, August, after himself.
Holidays
Fixed Events
July 1 Canada Day, National Day of Canada
July 1 Independence Day in Somalia
July 1 Independence Day in Burundi
July 1 Independence Day in Rwanda
July 1 Keti Koti (Suriname)
July 1 Republic Day (Ghana)
July 1 Doctor's Day (India)
July 2 Canada Day, observed on this date if July 1 is a Sunday
July 2 Bahia Independence Day (Brazil)
July 3 Independence Day in Belarus
July 3 Emancipation Day (US Virgin Islands)
July 4 Independence Day in the United States, commemorating the Declaration of Independence.
July 4 Filipino-American Friendship Day
July 4 Liberation Day (Rwanda)
July 5 Independence Day in Venezuela
July 5 Independence Day in Algeria
July 5 Independence Day in Cape Verde
July 6 Independence Day in Malawi
July 6 Independence Day in the Comoros
July 6-14 San Fermin festival and bull run in Pamplona, Spain.
July 7 Independence Day in the Solomon Islands
July 7 Tanabata in Japan, traditional 'Make a Wish' celebration
July 9 Independence Day (Argentina)
July 9 Independence Day (South Sudan)
July 10 Independence Day in the Bahamas
July 10 Silence Day
July 10 Statehood Day (Wyoming)
July 11 Day of the Flemish Community (Belgium)
July 11 World Population Day
July 11 National Day of Commemoration (Ireland)
July 11 to 13 Naadam (Mongolia)
July 12 Battle of the Boyne/Orangeman's Day (Northern Ireland)
July 12 Independence Day (São Tomé and Príncipe)
July 12 Independence Day in Kiribati
July 13 Statehood Day (Montenegro)
July 14 Bastille Day, national holiday of France
July 14 Republic Day (Iraq)
July 15 St. Swithun's Day in UK weather lore
July 18 Mandela Day
July 18 Constitution Day (Uruguay)
July 19 Sandinista Day (Nicaragua)
July 20 Independence Day (Colombia)
July 21 National Day of Belgium
July 21 Liberation Day (Guam)
July 22 Saint Mary Magdalene Day (Roman Catholicism)
July 23 Birthday of Haile Selassie I of Ethiopia
July 23 Revolution Day in Egypt
July 24 Pioneer Day (Utah)
July 24 Simon Bolivar Day (Bolivia, Ecuador, Venezuela)
July 25 Constitution Day (Occupation Day) in Puerto Rico
July 25 Christian feast day of Saint James, includes regional holiday in Galicia
July 26 Independence Day in Liberia
July 26 Independence Day in the Maldives
July 27 Victory Day (North Korea)
July 28 Independence Day in Peru
July 28 Liberation Day (San Marino)
July 29 Feast Day of St. Olav, celebrated in the Faroe Islands
July 29 International Tiger Day
July 29 World Hepatitis Day
July 30 Independence Day (Vanuatu)
July 30 Throne Day (Morocco)
July 31 Ka Hae Hawaii Day
Moveable events
Wimbledon tennis tournament, held in late June and early July
FIFA World Cup, often held in June and/or July
Summer Olympics, often held in July and/or August
Tour de France cycling race
In Northern Hemisphere countries, many Sports events and Music Festivals take place in July
National Ice Cream month in the United States
Presidents' Day (Botswana) on the 3rd Monday or Tuesday
So-called "Dog Days" in some Northern Hemisphere countries, referring to the hot summer weather
Marathon Races:
Gold Coast, Australia
Recife, Brazil
Rio de Janeiro, Brazil
San Francisco, California, United States
Selection of Historical Events
July 1 1863: American Civil War: The Battle of Gettysburg is fought until July 3.
July 1 1867: The Canadian Confederation is founded.
July 1 1937: The 999 emergency dialing service begins in the UK.
July 1 1997: The United Kingdom hands control of Hong Kong back to China.
July 1 1999: The new Scottish Parliament is opened in Edinburgh.
July 1 2013: Croatia joins the European Union.
July 2 1937: Amelia Earhart goes missing.
July 3 1844: The Great Auk becomes extinct, after the last group were killed in Iceland.
July 4 1776: 13 colonies on the East coast of North America issue the Declaration of Independence, now celebrated on this date in the United States.
July 4 1826: US Presidents John Adams and Thomas Jefferson die on the same day as each other.
July 4 2012: Scientists at CERN announce the discovery of a particle with properties consistent with the Higgs boson, after experiments at the Large Hadron Collider.
July 5 1811: Venezuela declares independence.
July 5 1962: Algeria becomes independent.
July 5 1975: Cape Verde becomes independent.
July 6 1964: Malawi becomes independent.
July 6 1975: The Comoros become independent.
July 7 1937: The Second Sino-Japanese War begins.
July 7 1978: The Solomon Islands become independent.
July 7 2005: Islamic extremists detonate explosives at tube stations around London and on a bus, killing 52 people.
July 9 1816: The United Provinces of Rio de la Plata declare independence, as the predecessor state of present-day Argentina.
July 9 2011: South Sudan becomes independent from Sudan, after a referendum six months earlier.
July 10 1913: At nearly 57 degrees Celsius, the hottest-recorded temperature on Earth, is measured in Death Valley, California.
July 10 1973: The Bahamas become independent from the UK.
July 10 1985: French agents torpedo the Rainbow Warrior vessel docked in Auckland harbour, New Zealand, where activists on board were protesting against French nuclear tests.
July 11 1960: The novel To Kill a Mockingbird by Harper Lee is first published.
July 11 1987: World population reaches 5 billion.
July 11 1995: The worst massacre in post-World War II Europe occurs at Srebrenica, at the height of the Balkan War.
July 11 2010: Spain wins the 2010 FIFA World Cup against the Netherlands after a bad-tempered match.
July 12 or 13 100 BC: Julius Caesar is born.
July 12 1561: St. Basil's Cathedral in Moscow is consecrated.
July 13 1930: The 1930 FIFA World Cup in Uruguay begins.
July 14 1789: The Bastille prison is stormed in Paris, starting the French Revolution.
July 14 2015: New Horizons flies by the dwarf planet Pluto.
July 16 1950: Uruguay wins its second FIFA World Cup, defeating host nation Brazil in the final.
July 17 1918: The family of Tsar Nicholas II is executed by the Bolsheviks in Russia.
July 17 1936: The Spanish Civil War begins.
July 19 1903: Maurice Garin wins the first Tour de France.
July 20 1810: Bogota, New Granada (now Colombia) declares independence from Spain.
July 20 1969: Neil Armstrong becomes the first person to walk on the Moon, followed shortly after by Buzz Aldrin.
July 21 1983: At -89.2 degrees Celsius, the coldest-ever recorded temperature is measured in Antarctica.
July 21 2011: End of the Space Shuttle programme.
July 22 2009: Solar eclipse over Asia and the Pacific Ocean.
July 22 2011: The 2011 Norway attacks occur, as Anders Behring Breivik kills a total of 77 people in two separate attacks.
July 23 1952: The Egyptian monarchy is removed from power in a coup.
July 24 1911: Explorer Hiram Bingham re-discovers the remains of Machu Picchu in Peru.
July 25 1978: Louise Brown, the first 'test-tube baby', is born in the UK.
July 26 1847: Liberia declares independence.
July 26 1965: The Maldives declare independence.
July 27 1940: Cartoon character Bugs Bunny makes his first appearance.
July 27 1953: The Korean War ends, though an official state of war still exists between North Korea and South Korea.
July 28 1821: Peru declares independence.
July 28 1914: World War I - Austria-Hungary declares war on Serbia.
July 28 1976: Tangshan, China, is struck by a huge earthquake, killing many thousands of people.
July 29 1900: King Umberto I of Italy is assassinated by Gaetano Bresci.
July 30 1930: Uruguay wins the first FIFA World Cup, defeating Argentina in the final in Montevideo.
July 30 1980: The New Hebrides, changing their name to Vanuatu, become independent.
July 30 2012: A massive power blackout affects around 620 million people in Northern India.
July 31 1790: The first US patent is given to Samuel Hopkins for a potash process.
Trivia
July has the 200th day of the year. July 19 in a common year, July 18 in a leap year.
July is often the hottest month in the Northern Hemisphere
The hottest and coldest-ever recorded temperatures on Earth were both recorded in July.
The months of June and July both start with the "Ju" letter combination in the English language and in some languages have only one letter's difference between their names.
July and August are the only months named after people who really lived (Julius Caesar and Augustus respectively).
January and July are the only 31-day months that are exactly six months apart. In the English language, they are also the only pair of months to both begin and end with the same letters (J and Y respectively)
July 1 is the only day in July that is entirely within the first half of the calendar year.
Canada, the United States and France are among the countries that celebrate their national holidays in July.
The astrological signs for July are Cancer (June 21 to July 21) and Leo (July 22 to August 21).
07 |
403 | https://simple.wikipedia.org/wiki/Japan | Japan | Japan (; romanised as nihon or nippon) is a country in East Asia. It is a group of islands close to the east coast of Korea, China and Russia. The Pacific Ocean is to the east of Japan and the Sea of Japan is to the west. Most people in Japan live on one of the four islands. The biggest of these islands, Honshu, has the most people. Honshu is the 7th largest island in the world. Tokyo is the capital of Japan and its biggest city.
The Japanese people call their country "Nihon" or "Nippon", which means "the origin of the Sun" in Japanese. Japan is a monarchy whose head of state is called the Emperor. Japan is the oldest monarchy in the world, lasting more than 2,000 years.
History
The first people in Japan were the Ainu people and other Jōmon people. They were closer related to Europeans or Mongols. They were later conquered and replaced by the Yayoi people (early Japanese and Ryukyuans). The Yayoi were an ancient ethnic group that migrated to the Japanese archipelago mainly from southeastern China during the Yayoi period (300 CE–300 AD). Modern Japanese people have primarily Yayoi ancestry at an average of 97%. The indigenous Ryukyuan and Ainu peoples have more Jōmon ancestry on the other hand.
The earliest records on Japan are from Chinese documents. One of those records said there were many small countries (in Japan) which had wars between them and later a country, ruled by a queen, became the strongest, unified others, and brought peace.
The Japanese began to write their own history after the 5th and 6th century, when people from Korea and China taught Japan about the Chinese writing system. Japan's neighbours also taught them Buddhism. The Japanese changed Buddhism in many ways. For example, Japanese Buddhists used ideas such as Zen more than other Buddhists.
Japan had some contact with the Europeans in the 16th century. The Portuguese were the first Europeans to visit Japan. Later, the Spanish and Dutch came to Japan to trade. Also, they brought Christianity. Japan's leaders welcomed them at first, but because Europeans had conquered many places in the world, the Japanese were scared they would conquer Japan too. So the Japanese did not let the Europeans come into Japan anymore, except in a small area in Nagasaki city. Many Christians were killed. Only the Chinese, Korean, and Dutch people were allowed to visit Japan, in the end, and they were under careful control of the Japanese government. Japan was opened for visitors again in 1854 by Commodore Matthew Perry, when the Americans wanted to use Japanese ports for American whale boats. Perry brought steamships with guns, which scared the Japanese into making an agreement with him.
This new contact with Europeans and Americans changed the Japanese culture. The Meiji Restoration of 1868 stopped some old ways and added many new ones. The Empire of Japan was created, and it became a very powerful nation and tried to invade the countries next to it.
It invaded and annexed Ryukyu Kingdom, Taiwan, and Korea. It had wars with China and Russia: the First Sino-Japanese War, the Boxer Rebellion, the Russo-Japanese War, World War I and Siberian Intervention.
In 1918, World War I allowed Japan, which joined the side of the victorious Allies, to capture German possessions in the Pacific and in China.
The Second Sino-Japanese War (1937-1945) grew to become a part of World War II when Japan became allies with Nazi Germany and Fascist Italy.
In 1941, Japan attacked Pearl Harbor in Hawaii, a water base of the United States, and destroyed or damaged many ships and airplanes. This started the United States' involvement in World War II. American and Japanese forces fought each other in the Pacific. Once airbases were established within range of the Japanese mainland, America began to win, and started dropping bombs on Japanese cities. America was able to bomb most of the important cities and quickly brought Japan close to defeat.
To make Japan surrender, the United States dropped two atomic bombs on the cities of Hiroshima and Nagasaki, killing 150,000 Japanese citizens. Soon after this the Soviet Union began to fight against Japan, and the Japanese army in Manchuria lost. Japan surrendered and gave up all the places it took from other countries, accepting the Potsdam Proclamation. The United States occupied Japan from September 1945 to April 1952 and forced it to write a new constitution, in which it promised to never go to war again.
Japan was granted membership in the United Nations in 1956. A period of record growth propelled Japan to become the second-largest economy in the world. On 11 March 2011, Japan suffered one of the largest earthquakes in its recorded history, triggering the Fukushima Daiichi nuclear disaster. On 1 May 1 2019, after the historic abdication of Emperor Akihito, his son Naruhito became Emperor, beginning the Reiwa era. On 8 July 2022, former Prime Minister Shinzo Abe was assassinated while giving a campaign speech in Nara.
Geography
Japan is a group of islands in the Western Pacific, off the coast of China. The four biggest islands are Honshu, Hokkaido, Shikoku, and Kyushu, and there are about 6,000 smaller islands there. Japan is separated from the Asian continent by the Sea of Japan and the East China Sea. Honshu, which means 'Mainland' in the Japanese language, is the biggest island. Hokkaido is the island north of Honshu. Kyushu is the island west of Honshu. Shikoku is the island to the south-west of Honshu.
In the middle of Japan there are mountains. They cover the middle of the islands and leave a very narrow strip of flat land on most coasts. Many of the mountains are extinct volcanoes, but some are still active. The highest of these mountains is the beautiful, volcano-shaped Mt Fuji (3,776 metres or 12,389 feet high). Japan has many earthquakes, in fact there are about 1500 of these every year. The biggest earthquake recorded in Japan was in 2011 - called '2011 Tohoku Earthquake'. It caused great damage to several power plants forcing Japan to shut down all its nuclear plants. There was nuclear core meltdown which caused a serious health risk to nearby villages and cities.
90% of the people living in Japan live in just 10% of the land, near the coast. The other 10% of the people in Japan live away from the coast.
Over 10 cities have more than a million people in them. The biggest city in Japan is Tokyo, which is the capital.
Science and technology
Japan has made many contributions to science and technology.
The QR code, the camera phone, the CD player, and the VHS were invented in Japan.
Japan is a leader in the robotics industry: It is the world's largest maker of industrial robots. It has the 2nd most industrial robots behind China.
Economy
Japan has one of the strongest economies of any country. Its nominal gross domestic product (GDP) is the 3rd highest in the world. It has a very low unemployment rate and was the 4th-largest exporter and 4th-largest importer in 2021.
Japan is known for its automotive industry: It is home to Toyota, the world's largest car company. Honda, Nissan, Suzuki and Mazda are other popular car makers from Japan.
Tokyo is the most populous city in the world. It also has one of the largest economies of any city. It is an important financial center: It has the Tokyo Stock Exchange, one of the largest stock exchanges in Asia.
Society and culture
Many things in Japanese culture originated in China, like Go and bonsai.
Cherry blossom also known as Japanese cherry and Sakura is thought to be the national flower of Japan.
Japan's traditional food is seafood, rice, miso soup, and vegetables. Noodles and tofu are also common. Sushi, a Japanese food made of cooked rice with vinegar with other ingredients such as raw fish, and sometimes fried shrimp, is popular around the world.
The religion in Japan is mostly Shinto and Buddhist. Due to the tolerant nature of the two main Japanese religions, and the resulting intermixing of the two, many Japanese identify as both Shinto and Buddhist at the same time. There are small numbers of Christians and Hindus, and a few Jews.
When it comes to popular culture, Japan is famous for making video games. Many of the biggest companies that make games, like Nintendo, Namco, and Sega, are Japanese. Other well-known parts of Japanese arts are its comics, called manga, and its digital animation, known as anime. Many people get to know Japanese or how life in Japan is like by reading manga or watching anime on television.
The Ryukyuans and the Ainu both have their own separate cultures, languages and religion.
Armed forces
Education
Cities, regions and territories
The biggest cities in Japan are:
Tokyo (capital city）
Yokohama
Nagoya
Osaka
Kyoto
Kobe
Hiroshima
Fukuoka
Kitakyushu
Sendai
Sapporo
Nagasaki
In Japan there are seven traditional regions:
Hokkaido
Tohoku
Kanto
Chubu
Kansai
Chugoku
Shikoku
Kyushu
Territorial problem
Since Japan is an island nation, Japan has several problems over territory because maritime boundaries can be hard to protect. These days, Japan is competing for at least 4 different territories. It cannot agree with some neighbouring countries on whether the land belongs to Japan or the other country.
Senkaku Islands problem (with China and Taiwan)
Liancourt Rocks island problem (with South Korea)
Southern Chishima Islands problem (with Russia)
Sea of Japan problem (with South Korea and North Korea)
Public transportation
There are several important international airports in Japan. Narita is the major international airport in the Tokyo area. Kansai International Airport serves as the main airport for Osaka, Kobe, and Kyoto. Chūbu Centrair International Airport near Nagoya is the newest of the three. Haneda Airport is close to central Tokyo and is the largest domestic airport in the country.
The Shinkansen is one of the fastest trains in the world and connects cities in Honshu and Kyushu. Networks of public and private railways are almost all over the country. People mostly travel between cities in buses.
Subdivisions
Modern Japan is divided into 47 prefectures. Before the Meiji period (1868-1912), the nation was divided into provinces which were consolidated in the prefectural system.
Sports
Japan has many traditional sports such as sumo, judo, karate, kyudo, aikido, iaido and kendo. Also, there are sports which were imported from the West such as baseball, soccer, rugby, golf and skiing. Baseball is the most popular sport.
Japan has taken part in the Olympic Games since 1912. It hosted the Olympic Games in 1964, 1972, 1998 and 2020. From 1912 until now, Japanese sportspeople have won 398 medals in total.
Professional sports are also popular and many sports such as baseball (see Pacific League and Central League), soccer (see List of Japanese football teams), sumo, American football, basketball and volleyball, are played professionally.
Related pages
Japanese food
Japanese language
Japanese calendar
References
Notes
Other websites
Government
Kantei.go.jp, official prime ministerial and cabinet site
Ministry of Foreign Affairs, papers on Japan's foreign policy, education programs, culture and life
National Diet Library
Sntv24samachar
Shugi-in.go.jp, official site of the House of Representatives
Chief of State and Cabinet Members. .
G7 nations
Current monarchies
Monarchies of Asia
G8 nations |
404 | https://simple.wikipedia.org/wiki/Jargon | Jargon | Jargon is a special way to use words that are shared only by a certain group of people. They may not mean what the dictionary says they mean. They have different meanings to the people using them than their everyday meaning.
For example, the ordinary words boot, net, and web also have special meanings for users of computers, the Internet, and the World Wide Web. These, and to flame, to ping and many acronyms are part of net jargon.
An acronym means that only some of the letters in the word or phrase are used. Often this is the first letter of each word. Other acronyms found online are simply common shorthand.
Usually, more jargon is created over time.
Jargon is common in the military and other complex organisations. It includes phrases like SNAFU.
Jargon can be used by a clique to prevent others from joining or understanding, but it also is often just used because it is shorter.
Terminology |
408 | https://simple.wikipedia.org/wiki/Jupiter | Jupiter | Jupiter is the largest planet in the Solar System. It is the fifth planet from the Sun. Jupiter is a gas giant because it is so large, and made mostly of gas. The other gas giants in the Solar System are Saturn, Uranus, and Neptune.
Jupiter's mass is about 318 times the mass of Earth. This is more than twice the mass of all the other planets in the Solar System put together.
Jupiter can be seen from Earth without using a telescope, in fact, it is the third-brightest object in the night sky. Only the Earth's moon and Venus are brighter. The ancient Romans named the planet after their King of the Gods, Jupiter (Latin: Iuppiter).
Jupiter has 95 known moons. About 75 of them are very small—less than five kilometres wide. The four largest moons of Jupiter are Io, Europa, Ganymede, and Callisto. They are called the Galilean moons because Galileo Galilei discovered them. Ganymede is the largest moon in the Solar System. Its diameter is larger than that of the planet Mercury.
Name and symbol
Jupiter was named for the king of the gods. The Greeks called him Zeus. The Romans called him Jupiter. The symbol for Jupiter, ♃, is from the Greek zeta. It has a horizontal stroke . This stands as an abbreviation for Zeus.
Structure
Jupiter is the biggest planet in the Solar System. Its diameter is 142,984 km. This is eleven times larger than the diameter of Earth. Jupiter is twice as massive as all the other planets in the Solar System put together. Jupiter is 318 times as massive as Earth. The volume of Jupiter is 1,317 times the volume of Earth. In other words, 1,317 Earth-sized objects could fit inside it. It gives off more heat than it gets from the Sun.
Atmosphere
The atmosphere near the surface of Jupiter is about 90% hydrogen, 10% helium, and less than 1% other gases.
The lower atmosphere is so heated and the pressure so high that helium changes to liquid. It rains down onto the planet. Based on spectroscopy, Jupiter seems to be made of the same gases as Saturn. It is different from Neptune or Uranus. Those two planets have much less hydrogen and helium gas.
Core
It is not possible to say exactly what metals are in the core of Jupiter.. However, by measuring the gravity around Jupiter, one can estimate its size. The inner core is dense. It has a lot of heavy elements, probably in the form of rock and ice. The heavy elements in the core have a total mass of 7–25 times that of Earth.
Round the unknown inner core is an outer core. The outer core of Jupiter is thick, liquid hydrogen.
Jupiter is mainly made of the same elements (hydrogen and helium) as the Sun, but it is not large enough to have the internal pressure and temperature necessary to cause hydrogen to fuse to helium, the energy source that powers the Sun and most other stars. If Jupiter had 75 times its mass, it could fuse hydrogen to helium.
Cloud layers
Jupiter has many bands of clouds going horizontally across its surface. The light parts are zones and the darker ones are belts. The zones and belts often interact with each other. This causes huge storms. Wind speeds of 360 kilometres per hour (km/h) are common on Jupiter. To show the difference the strongest tropical storms on Earth are about 100 km/h.
Most of the clouds on Jupiter are made of ammonia. There may also be clouds of water vapor like clouds on Earth. Multiple spacecraft such as Voyager 1 have seen lightning on the surface of the planet. Scientists think it was water vapor because lightning needs water vapor. These lightning bolts have been measured as up to 1,000 times as powerful as those on Earth.
Great Red Spot
One of the biggest features in Jupiter's atmosphere is the Great Red Spot. It is a huge storm that is bigger than the entire Earth. It is on record since at least 1831, and as early as 1665. Images by the Hubble Space Telescope have shown as many as two smaller "red spots" next to the Great Red Spot. Storms can last for hours or as long as hundreds of years in the case of the Great Red Spot.
Magnetic field
Jupiter has a magnetic field like Earth's but 10 times stronger. It also has a magnetosphere much bigger and stronger than Earth's. The field traps radiation belts much stronger than Earth's Van Allen radiation belts, strong enough to endanger any spacecraft travelling near. The magnetic field is probably caused by the large amounts of liquid metallic hydrogen in the core of Jupiter. The four largest moons of Jupiter and many of the smaller ones orbit or go around the planet within the magnetic field. This protects them from the solar wind. Jupiter's magnetic field is so large, it reaches the orbit of Saturn 7.7 million miles (12 million km) away. The Earth's magnetosphere does not even cover its moon, less than a quarter of a million miles (400,000 km) away. Jupiter also experiences large aurorae, which happen when charged particles from the volcanic moon Io land in its atmosphere.
Ring system
Jupiter also has a thin planetary ring system. These rings are difficult to see and were not discovered until 1979 by NASA's Voyager 1 probe. There are four parts to Jupiter's rings. The closest ring to Jupiter is called the Halo Ring. The next ring is called the Main Ring. It is about wide and only thick. The Main and Halo rings of Jupiter are made of small, dark particles. The third and fourth rings, called the Gossamer rings, are transparent and are made from microscopic debris and dust. This dust probably comes from small meteors striking the surface of Jupiter's moons. The third ring is called the Amalthea Gossamer Ring, named after the moon Amalthea. The outer ring, the Thebe Gossamer Ring, is named after the moon Thebe. The outer edge of this ring is about from Jupiter.
Formation
Jupiter and other gas giants probably started as rocky planets, similar to Earth. This theory is called the core accretion model. The rocky core would have formed in the early Solar System, within a disk of gases around the Sun. When the planet reached a critical mass, its gravity started to quickly capture lots of gas. In this way, Jupiter became a giant planet. In order for Jupiter to reach this critical mass before the gas disk disappeared, there must have been lots of ice in the area. Jupiter must have formed outside the snow line, the area that is cold enough for water to freeze.
The disk instability model is another theory. It says that Jupiter was formed by gas clumping together in the disk around the Sun. In this case, a rocky core would not need to form. However, this process would probably create planets that are bigger than Jupiter, so most scientists think Jupiter was formed by core accretion.
Orbit
The orbit of a planet is the time and path it takes to go around the Sun. In the time it takes for Jupiter to orbit the Sun once, the Earth orbits the Sun 11.86 times. One year on Jupiter is equal to 11.86 years on Earth.
The average distance between Jupiter and the Sun is 778 million kilometres. This is five times the distance between Earth and the Sun. Jupiter is not tilted on its axis as much as Earth or Mars. This causes it to have no seasons, for example summer or winter. Jupiter rotates, or spins around very quickly. This causes the planet to bulge in the middle. Jupiter is the fastest spinning planet in the Solar System. It completes one rotation or spin in 10 hours. Because of the bulge, the length of the equator of Jupiter is longer than the length from pole to pole.
Jupiter in the Solar System
Grand tack hypothesis
The orbit of Jupiter is unusual compared to planets in other star systems. It is usual for giant planets to be much nearer to their stars. Because Jupiter is not, this suggests an unusual explanation is needed for the arrangement of the planets in the Solar System. Astronomers have an idea on why this happened. It is called the grand tack hypothesis.
It is suggested that Jupiter formed about 3.5 astronomical units from the Sun. It started migrating inward and scattered the rocky planet-forming materials out beyond its orbit. Saturn formed later than Jupiter and started its own inward migration. When Jupiter reached 1.5 astronomical units, it became locked into an orbital resonance with Saturn. Both planets turned around and moved outward until Jupiter arrived at its current position, 5.2 astronomical units from the Sun. Saturn arrived at about 7 astronomical units.
The grand tack hypothesis explains another mystery of the Solar System. Mars should have been larger than Earth but is instead only of this size. On Jupiter's grand tack, it cleared the area where Mars orbits today. After it left, the material remaining was only enough to form a small planet and a low-mass asteroid belt. Although the hypothesis has not been absolutely proven, there is no other competing explanation why the Solar System's giant should be so far from its star, and Mars so small.
Asteroids and comets
Jupiter's large gravity has had an effect on the Solar System. Jupiter protects the inner planets from comets by pulling them towards itself. Because of this, Jupiter has the most comet impacts in the Solar System.
Two groups of asteroids, called Trojan asteroids, have settled into Jupiter's orbit around the Sun. One group is called the Trojans and the other group is called the Greeks. They go around the Sun at the same time as Jupiter.
Research and exploration
From Earth
Jupiter is the third brightest object in the night sky, after the Moon and Venus. The first person known to really study the planet was Galileo Galilei in 1610. He was the first person to see Jupiter's moons Io, Europa, Ganymede and Callisto. This was because he used a telescope, unlike anyone before him.
No new moons were discovered for more than two hundred years. In 1892, astronomer E.E. Barnard found a new moon using his observatory in California. He called the moon Amalthea. It was the last of Jupiter's 67 moons to be discovered by human observation through a telescope.
In 1994, bits of the comet Shoemaker Levy-9 hit Jupiter. It was the first time a collision between two Solar System objects was seen.
From spacecraft
Seven spacecraft have flown past Jupiter since 1973. These were Pioneer 10 (1973), Pioneer 11 (1974), Voyagers 1 and 2 (1979), Ulysses (1992 and 2004), Cassini (2000) and New Horizons (2007). Two spacecraft have been brought into orbit around Jupiter. These were Galileo (1995) and Juno (2011).
The Pioneer missions were the first spacecraft to take close-up pictures of Jupiter and its moons. Five years later, the two Voyager spacecraft discovered three new moons. They captured photo evidence of lightning on the night side of Jupiter.
The Ulysses probe was sent to study the Sun. It only went to Jupiter after it had finished its main mission. Ulysses had no cameras so it took no photographs.
In 2006, the Cassini spacecraft, on its way to Saturn, took some very good, very clear pictures of the planet. Cassini also found a moon and took a picture of it but it was too far away to show the details.
The Galileo mission in 1995 was the first spacecraft to go into orbit around Jupiter. It flew around the planet for seven years and studied the four biggest moons. It launched a probe into the planet to get information about Jupiter's atmosphere. The probe travelled to a depth of about 150 km before it was crushed by the pressure of all the gas above it. The Galileo spacecraft was also crushed in 2003 when NASA steered the craft into the planet. They did this so that the craft could not crash into Europa, a moon that scientists think might have life.
NASA has sent another spacecraft to Jupiter called Juno. It was launched on August 5, 2011 and arrived at Jupiter on July 4, 2016. NASA published some results from the Juno mission in March 2018.
Several other missions have been planned to send spacecraft to Jupiter's moons, Europa, Callisto, and Ganymede. One called JIMO (Jupiter Icy Moons Orbiter) was cancelled in 2006 because it cost too much money. The European Space Agency launched JUICE (Jupiter Icy Moons Explorer) on April 14, 2023. It will enter orbit around Jupiter in July 2031.
Moons
Jupiter has 95 known moons, as of February 23, 2023. The four largest were seen by Galileo with his primitive telescope and nine more can be seen with modern telescopes. Three moons were identified by the Voyager spacecraft. All other moons were first seen on Earth, using modern telescopes and advanced photography methods. The smallest moon (S/2003 J 12) is only one kilometre across. The largest, Ganymede, has a diameter of 5,262 kilometres. It is bigger than the planet Mercury. The other three Galilean moons are Io, Europa and Callisto. Due to the way they orbit Jupiter, gravity affects three of these moons greatly. The friction caused by the gravity of Europa and Ganymede pulling on Io makes it the most volcanic object in the Solar System. It has over 400 volcanoes, more than three times as many as Earth.
Related pages
List of planets
Comet Shoemaker-Levy 9
References
Notes
Other websites
Jupiter (planet) -Citizendium
Very good articles |
410 | https://simple.wikipedia.org/wiki/King | King | A king is a male monarch who rules a country or territory which is a monarchy. The person usually inherits the title and position. A king comes to power when the previous monarch dies, who is usually a family member of his, most likely a parent. Sometimes a person may become king due to the previous monarch's abdication, for example George VI (who became King of Britain after his brother decided to abdicate).
If a country has a king or a queen, that means it is a monarchy. A country which a king or queen rules is called a kingdom.
For most of history, most countries were ruled in this way, especially in Europe. However, most countries, such as France, decided to become republics. Some, such as the United Kingdom, still have a royal family. In some countries, people chose a new king from other people to decide from.
The wife of a king is called a queen. A woman who becomes a ruler because of inheritance is also called a queen.
In the Muslim world a King would be known as Malik, Sultan or shah.
Shah (Persian: شاه) is a Persian word which means the king or ruler of a country. The term "Shah" often means Mohammad Reza Pahlavi, Shah of Iran from 1949 to 1979.
Some modern kings today include Charles III of the United Kingdom and Felipe VI of Spain.
Related pages
Shah
Emperor
Prince
Queen
Princess
Sultan
Duke |
411 | https://simple.wikipedia.org/wiki/Knowledge | Knowledge | Knowledge means the things which are true, as opposed to opinion. Information which is correct is knowledge. Knowledge can always be supported by evidence. If a statement is not supported by evidence, then it is not knowledge. The evidence makes it justified.
Knowledge can refer to a theoretical or practical understanding of a subject. This was the point of Ryle's distinction between "knowing that" and "knowing how". It can be implicit (as with practical skill or expertise) or explicit (as with the theoretical understanding of a subject); it can be more or less formal or systematic. In philosophy, the study of knowledge is called epistemology. The philosopher Plato defined knowledge as "justified true belief". This definition is the subject of the Gettier problems.
All knowledge is a claim to be true, but the claim can be incorrect. The only claims (propositions) which are certainly true are circular, based on how we use words or terms. We can correctly claim that there are 360 degrees in a circle, since that is part of how circles are defined. The point of Aristotle's syllogism was to show that this kind of reasoning had a machine-like form:
If all swans are white, and this is a swan, then it must be white.
But actually, in the real world, not all swans are white.
The most widely accepted way to find reliable knowledge is the scientific method. Yet one thing all philosophers of science agree is that scientific knowledge is just the best we can do at any one time. All scientific knowledge is provisional, not a claim of absolute truth.
Religion and knowledge
Knowledge in religion is different in that it depends on faith, belief and the authority of religious leaders, not on evidence of a scientific or legal kind. There are differing views on whether religious statements should be regarded as knowledge.
In many expressions of Christianity, such as Catholicism and Anglicanism, knowledge is one of the seven gifts of the Holy Spirit.
In the Garden of Eden knowledge is the factor that made humans greedy and treacherous. But in the Book of Proverbs it states: 'to be wise you must first obey the LORD' (9:10).
In Islam, knowledge has great significance. "The All-Knowing" (al-ʿAlīm) is one of the Names of God, reflecting distinct properties of God in Islam. The Qur'an asserts that knowledge comes from God and various hadith encourage getting knowledge. Muhammad is reported to have said "Seek knowledge from the cradle to the grave" and "Verily the men of knowledge are the inheritors of the prophets". Islamic scholars, theologians and jurists are often given the title alim, meaning 'knowledgeable'.
References
Basic English 850 words |
412 | https://simple.wikipedia.org/wiki/Kauai | Kauai | Kauai (Kaua'i in Hawaiian) is the second oldest (after Ni'ihau) and fourth largest of the main Hawaiian Islands, in the United States. Known also as the "Garden Isle", Kaua'i lies 73 miles (117 kilometers) across the Kauai Channel, northwest of Honolulu on Oahu. It is of volcanic origin. The highest point on the island is Kawaikini. It is located above sea level. The wettest spot on Earth, with average rainfall of a year, is just east of Mount Waialeale. The high yearly rainfall has eroded deep valleys and canyons in the central mountain. The waterfalls that have been created by erosion in canyons are now popular tourist spots.
The city of Lihue, on the island's southeast side, is the seat of Kauai County. It has a population of around 6,500, and is the main city on the island. Waimea, which is located on the island's southwest side and the first capital of Kauai, was the first place visited by Englishexplorer Captain James Cook in 1778. It was also the first capital of Kauai. The city is at the head of one of the most beautiful canyons in the world, Waimea Canyon, whose gorge is 900 meters (3,000 feet) deep.
The island of Kauai was featured in Disney's 2002 animated feature film Lilo & Stitch.
Lihue Airport is the only commercial airport on the island. There are two other general aviation airports on the island: Port Allen Airport, and Princeville Airport.
Islands of Hawaii |
413 | https://simple.wikipedia.org/wiki/Kaho%CA%BBolawe | Kahoʻolawe | Kahoolawe is the smallest of the eight main volcanic islands of Hawaii. It is west of Maui and south of Lanai. It is roughly 11 miles long by across (). The highest point, Lua Makika, is above sea level. The island is dry because its low elevation does not cause much rain (orographic precipitation) to fall from the northeastern trade winds.
Kahoolawe was used as a gunfire and bombing target by the United States military during World War II. It was a defense training area by the United States Navy from around 1941 until May 1994. Popular opinion in the state against this practice brought the end to this use. Navy has since been trying to cleanup unexploded ordnance (bombs and explosive shells) from the island. Ordnance is still buried or lying on the ground. Other items have washed down gullies and still other unexploded ordnance is underwater offshore. In 1981, the entire island was included on the National Register of Historic Places.
The island is planned to be given back to the Hawaiian people. In 1993, the U.S. Congress passed a law that "recognized the cultural importance of the island, required the Navy to return the island to the State, and directed the Navy to do an unexploded ordnance (UXO) cleanup and environmental restoration" . The turnover officially occurred on November 11, 2003, but the cleanup has not yet been completed. The U.S. Navy was given $400 million and 10 years to complete the large cleanup task, but this work has gone much slower than planned.
After the cleanup is finished, the restoration of Kahoolawe will need ways to control erosion, restore the plant life, recharge the water table, and slowly replace alien plants with native ones. Plans will include methods for damming gullies and reducing rainwater runoff. Non-natives will temporarily stabilize some areas before the permanent planting of native plants.
Other websites
http://www.state.hi.us/kirc/main/home.htm
Islands of Hawaii
Volcanoes of Hawaii |
414 | https://simple.wikipedia.org/wiki/Killing | Killing | Killing a living thing is when someone or something ends that life and makes the living thing die. It means causing a death. When a human being kills another human being, it is called murder or homicide, such as manslaughter.
Pesticides and herbicides are poisons for killing bad wild small animals or plants, respectively.
When a soldier kills another in war, it is called "combat". When the state kills a convict sentenced to capital punishment, it is called execution. When someone kills a powerful person it is called assassination. When a person who wants to die kills himself it is suicide, or euthanasia if killed by another. When people kill other people to eat them, it is called cannibalism.
Related pages
Death
Murder
Suicide
Manslaughter
Violence
Death |
417 | https://simple.wikipedia.org/wiki/Kilometre | Kilometre | The kilometre is a common unit used for longer distances on Earth. The international unit for measuring distances is the metre and a kilometre is 1000 metres. It is used in most countries for measuring road and sea distances. In the UK and the USA, the statute mile is used more than kilometres for road distances and the nautical mile for sea distances.
It is often used to measure the speed of cars, planes and boats by saying how many kilometres it can travel in an hour. This is shown as km/h.
It is also spelled kilometer. This spelling is used in American English.
One kilometre is 0.6214 miles (1093 yards or 3280.84 feet). This means that one mile is 1.6093 kilometres.
One kilometre is the approximate distance a healthy adult human being can walk in ten minute
A kilometer is sometimes called a klick
Related pages
Yard (unit of length)
Units of length |
419 | https://simple.wikipedia.org/wiki/Language | Language | Language is the normal way humans communicate. Only humans use language, though other animals communicate through other means. The study of language is called linguistics.
Human language has syntax, a set of rules for connecting words together to make statements and questions. Language can also be changed, by adding new words, for example, to describe new things. Other animals may inherit a set of calls which have pre-set functions.
Language may be done by speech or by writing or by moving the hands to make signs. It follows that language is not just any way of communicating. Even some human communication is not language: see non-verbal communication. Humans also use language for thinking.
When people use the word language, they can also mean:
the language of a community or country
the ability of speech
formal language in mathematics, logic and computing
sign language for deaf people (people who cannot hear)
a type of school subject
UNESCO says that 2,500 languages are at risk of becoming extinct.
Universals of language
All languages share certain things which separate them from all other kinds of communication.
A language has rules which are shared by a community.
All human languages are based on sound and hearing, or in the case of sign language, vision. All the basic sound units, or phonemes, have this in common: they can be spoken by the human voice, and heard by the human ear.
The sounds come out in a sequence, not all at once. This is mimicked in writing, where the marks are put on the paper or screen in the same sequence.
The stream of sounds have little gaps between them, and come in bigger packages. We call the bigger packets sentences or questions or replies or comments.
In most languages, English being one, the syntax or order of the words can change the meaning: "the cat sat on the man" is different from "the man sat on the cat".
Words (which may be made up of more than one phoneme) divide up into two classes: content and non-content. Content words have meaning: nouns, verbs, adjectives, etc.. Non-content words are there to make the language work: and, not, in, out, what, etc. Grammar consists of studying how words fit together to mean something.
All languages have:
sentences with two types of expression: nouns and verbs: Jill is here.
adjectives to modify nouns: good food.
ways of linking: sink or swim.
dummy elements: Jill likes to swim, so do I.
devices to order or ask questions: Get up! Are you ill?
Most of the languages have a written form. Before the invention of audio recording, the writing system was the only way to keep track of spoken information.
All languages constantly evolve. New words appear, new forms of saying things, new accents.
There are many more things in common between languages.
Inheritance
The capacity to learn and use language is inherited. Normally, all humans are born with this capability. Which language is learned by a child depends on which language is spoken by the child's community. The capacity is inherited, but the particular language is learned.
Children have a special period, from about 18 months to about four years, which is critical for learning the language. If this is seriously disrupted, then their language skills will be damaged. Older people learn differently, so they seldom learn a second language as well as they learn their native language.
Types of language
Mathematics and computer science use created languages called formal languages (like computer programming languages), but these may or may not be 'true' languages. Mathematics itself is seen as a language by many. Some people consider musical notation to be a way of writing the musical language.
Chinese is the language with the most native speakers in the world, but Chinese is not really a language. It is a close family of dialects, some of which are as different as Romance languages are from one another.
Greek is one of the world's oldest surviving languages. In its modern form, Greek is the official language of Greece and Cyprus and one of the 24 official languages of the European Union. About 13.5 million people speak the Greek language.
English is often called "the international language", or lingua franca. It is the main second language of the world and the international language of science, travel, technology, business, diplomacy, and entertainment. French had a similar status until the 20th century, and other languages had it at other times.
English as a first language: 380 million.p108
English as an official second language: up to 300 million.
English taught as a second language, but with no official status: anyone's guess, up to 1000 million/1 billion.
Chinese (Mandarin): 390 million native speakers.p96
Hoffish(Swedish Dialect): 176 (smallest spoken language)
Some languages are made up so that a lot of people around the world can learn them, without the new languages being tied to any specific country or place. These are called constructed languages also known as Oral Sects. One of the most popular of these languages is Esperanto, which is sometimes called "La Internacia Lingvo," or "The International Language." Another of these languages is called Volapük, which was popular about a hundred years ago but is much less popular now. It has mostly been replaced by languages like Esperanto, Interlingua, and Ido. Dialects are basically other versions of a language. For example, Hoffish is a dialect of Swedish.
Part of the reason that Volapük became unpopular is that some sounds are hard to say for people who speak Spanish or English, two of the most widely spoken languages in the world.
Some languages are only spoken by closed ethnic groups such as the Romani language, which is an Indo-Aryan language spoken by only gypsies.
Related pages
Alphabet
Basic English
Sign language
English as a foreign language
English language
Historical linguistics
Language education
Language families and languages
Linguistics
List of languages
Orthography
Phonology
Second language
Semantics
Speech therapy
References
Other websites
Language (general) -Citizendium |
423 | https://simple.wikipedia.org/wiki/Leisure | Leisure | Leisure (or free time) is when a person can choose what to do. During a person's leisure time, they do not have an obligation to be at school or work at a job. During leisure time, people can do fun activities, family activities, or other non-work activities, such as hobbies.
Common forms of recreation or leisure are:
Playing sports such as football or hockey
Playing games such as chess or cards
Exercising such as running or lifting weights
Watching television and movies
Listening to music
Hobbies such as playing piano or guitar, knitting, or sewing
Travelling
Reading
Drawing
Painting
A vacation or holiday is the setting aside of time specifically for leisure. During their vacation, some people travel to a different region or country, and stay at a hotel so that they can do things they could not do near home. Other people prefer to spend their vacation time at home in their own community.
In rich industrialized countries such as the US and Canada, as well as in most European countries, workers are allowed to stay home on the weekend (usually Saturday and Sunday), and use it as leisure time. People in poorer developing countries usually have less leisure time, as they have to work longer hours and more days per year. |
424 | https://simple.wikipedia.org/wiki/Live | Live | Live can be a verb. It rhymes with "give". "To live" means "to be alive" (and it is not dead). If you live, then you have life.
It can be used in a general way:
"I live in London".
"I live in a house".
"A person can always live in fear".
Live can be an adjective. It rhymes with "five".
In television, a "live" program is one where what is happening can be seen at the same time as it is happening. Sports program are usually "live".
In music, If a CD is a "live recording" it means a recording which was made at a concert with an audience present. If it is not a live recording it may be a recording made in a studio.
Live album
"Live" can also mean "full of energy" or simply "happening now". Something that is being talked about in the newspapers at the moment can be a "live issue".
VOA Special English words |
425 | https://simple.wikipedia.org/wiki/Life | Life | Life is a concept in biology. It is about the characteristics, state, or mode that separates a living thing from dead matter.
The word itself may refer to a living being or to the processes of which living things are a part. It may refer to the period when a living thing is functional (as between birth and death).
The study of life is called biology: people who study life are called biologists. A lifespan is the average length of life in a species. Most life on Earth is powered by solar energy: the only known exceptions are the chemosynthetic bacteria living around the hydrothermal vents on the ocean floor. All life on Earth is based on the chemistry of carbon compounds, specifically involving long-chain molecules such as proteins and nucleic acid. With water, which all life needs, the long molecules are wrapped inside membranes as cells. This may or may not be true of all possible forms of life in the Universe: it is true of all life on Earth today.
Summary
Living things, or organisms, can be explained as open systems. They are always changing, because they exchange materials and information with their environment. They undergo metabolism, maintain homeostasis, possess a capacity to grow, respond to stimuli and reproduce.
Through natural selection, they adapt to their environment in successive generations. More complex living organisms can communicate through various means. Many life forms can be found on Earth. The properties common to these organisms—plants, animals, fungi, protists, archaea, and bacteria—are a carbon and water-based cellular form with complex organization and heritable genetic information.
The systems that make up life have many levels of organization. From smallest to biggest, they are: molecule, cell, tissue (group of cells with a common purpose), organ (part of the body with a purpose), organ system (group of organs that work together), organism, population (group of organisms of the same species), community (all of the organisms that interact in an area), ecosystem (all of the organisms in an area and the non-living surroundings), and biosphere (all parts of the Earth that have life).
At present, the Earth is the only planet humans have detailed information about. The question of whether life exists elsewhere in the Universe is open. There have been a number of claims of life elsewhere in the Universe. None of these have been confirmed so far. The best evidence of life outside of Earth is are nucleic acids that have been found in certain types of meteorites.
Definitions
One explanation of life is called the cell theory. The cell theory has three basic points: all living things are made up of cells. The cell is the smallest living thing that can do all the things needed for life. All cells must come from pre-existing cells.
Something is often said to be alive if it:
grows,
takes in food, uses the food for energy, and passes waste products (see metabolism),
moves: it must either move itself, or have movement inside itself,
reproduces, either sexually (with another living thing) or asexually, by creating copies of itself,
reacts to its surroundings,
functions
However, not all living things fit every point on this list.
Mules cannot reproduce, and neither can worker ants.
Viruses and spores are not actively alive (metabolising) until the conditions are right.
They do, however, fit the biochemical definitions: they are made of the same kind of chemicals.
The thermodynamic definition of life is any system which can keep its entropy levels below maximum (usually through adaptation and mutations).
A modern approach
A modern definition was given by Humberto Maturana and Francisco Varela in 1980, to which they gave the name autopoiesis:
The production of their own components
The correct assembly of these components
Continuous repair and maintenance of their own existence.
Roth commented that "In short, organisms are self-reproducing and self-maintaining, or 'autopoietic', systems". This approach makes use of molecular biology ideas and systems science ideas.
What life needs
Chemistry
Life on Earth is made from organic compounds—molecules that contain carbon. Four types of long-chain molecules (macromolecules) are important: carbohydrates, lipids, proteins, and nucleic acids.
Simple carbohydrates (sugars) are used for energy, or as a building block. Complex carbohydrates, like starch and cellulose, can keep energy for a long time. They are also used to make a strong structure, like a plant stem.
Lipids can be insulation to keep a living thing warm, such as fat on a penguin, or to stop water from passing in or out, such as waterproof feathers. Two layers of phospholid (a kind of lipid) make up all cell membranes. Some kinds of lipids are hormones, which send messages from one cell to another.
Proteins, long chains of amino acids, have many purposes. They fold into complex shapes because their amino acids interact. Proteins are involved in many chemical reactions, to make them go faster.
Nucleic acids, including DNA and RNA, are long chains of nucleotides. There are only four kinds of nucleotides in each chain, but they are the instructions for life, like a language. Each three nucleotides tell the cell to make one amino acid. One part of a nucleic acid is the code for one protein molecule.
Almost all living things need the chemical elements carbon, hydrogen, oxygen, nitrogen, sulfur, and phosphorus, to build these macromolecules. Living things also need small amounts of other elements, called trace elements. Water is a very important part of all living things. For example, humans are about two-thirds water. Water is a solvent that lets molecules mix and react with other molecules.
Energy sources
All living things need energy to survive, move, grow, and reproduce. Some can get energy from the environment without help from other living things: these are called producers, or autotrophs. Plants, algae, and some bacteria, a group of producers called photoautotrophs, use the sun's light for energy. When producers use light to make and store organic compounds, this is called photosynthesis. Some other producers, called chemoautotrophs, get energy from chemicals that come out of the ocean floor in hydrothermal vents. Other living things get their energy from organic compounds: these are called consumers, or heterotrophs. Animals, fungi, most bacteria, and most protists are consumers. Consumers can eat other living things or dead material.
Both producers and consumers need to break down organic compounds to free energy. The best way to do this is aerobic respiration, which frees the most energy, but living things can only do aerobic respiration if they have oxygen (O2). They can also break down these compounds without oxygen, using anaerobic respiration or fermentation.
Cells
All living things have cells. Every cell has a cell membrane on the outside, and a jelly-like material that fills the inside, called cytoplasm. The membrane is important because it separates the chemicals inside and outside. Some molecules can pass through the membrane, but others cannot. Living cells have genes, made of DNA. Genes say to the cell what to do, like a language. One DNA molecule, with many genes, is called a chromosome. Cells can copy themselves to make two new cells.
There are two main kinds of cells: prokaryotic and eukaryotic. Prokaryotic cells have only a few parts. Their DNA is the shape of a circle, inside the cytoplasm, and they have no membranes inside the cell. Eukaryotic cells are more complex, and they have a cell nucleus. The DNA is inside the nucleus, and a membrane is around the nucleus. Eukaryotic cells also have other parts, called organelles. Some of these other organelles also have membranes.
Types of life
Taxonomy is how lifeforms are put into groups. The smaller groups are more closely related, but the larger classes are more distantly related. The levels, or ranks, of taxonomy are domain, kingdom, phylum, class, order, family, genus, and species. There are many ideas for the meaning of species. One idea, called the biological species concept, is as follows. A species is a group of living things that can mate with each other, and whose children can make their own children.
Taxonomy aims to group together living things with a common ancestor. This can now be done by comparing their DNA. Originally, it was done by comparing their anatomy.
The three domains of life are Bacteria, Archaea, and Eukarya. Bacteria and archaea are prokaryotic and have only one cell. Bacteria range in size from 0.15 cubic micrometres (Mycoplasma) to 200,000,000 cubic micrometres (Thiomargarita namibiensis). Bacteria have shapes which are useful in classification, such as round, long and thin, and spiral. Some bacteria cause diseases. Bacteria in our intestines are part of our gut flora. They break down some of our food. Both bacteria and archaea may live where larger forms of life cannot. Bacteria have a molecule called peptidoglycan in their cell wall, but archaea do not. Archaea have a molecule called isoprene in their cell membrane, but bacteria do not.
Eukarya are living things with eukaryotic cells, and they can have one cell or many cells. Most eukaryotes use sexual reproduction to make new copies of themselves. In sexual reproduction, two sex cells, one from each parent, join to make a new living thing.
Plants are eukaryotes that use the Sun's light for energy. They include algae, which live in water, and land plants. All land plants have two forms during their life cycle, called alternation of generations. One form is diploid, where the cells have two copies of their chromosomes, and the other form is haploid, where the cells have one copy of their chromosomes. In land plants, both diploid and haploid forms have many cells. Two kinds of land plants are vascular plants and bryophytes. Vascular plants have long tissues that stretch from end to end of the plant. These tissues carry water and food. Most plants have roots and leaves.
Animals are eukaryotes with many cells, which have no rigid cell walls. All animals are consumers: they survive by eating other organic material. Almost all animals have neurons, a signalling system. They usually have muscles, which make the body move. Many animals have a head and legs. Most animals are either male or female. They need a mate of the opposite sex to make offspring. Sex cells from the male and female can meet inside or outside the body.
Fungi are eukaryotes which may have one cell, like yeasts, or many cells, like mushrooms. They are saprophytes. Fungi break down living or dead material, so they are decomposers. Only fungi, and a few bacteria, can break down lignin and cellulose, two parts of wood. Some fungi are mycorrhiza. They live under ground and give nutrients to plants, like nitrogen and phosphorus. Eukaryotes that are not plants, animals, or fungi are called protists. Most protists live in water.
Evolution
Over thousands or millions of years, living things can change, through the process of evolution. One kind of evolution is when a species changes over time, such as giraffes growing longer necks. Most of the time, the species becomes better suited to its environment, a process called adaptation. Evolution can also cause one group of living things to split into two groups. This is called speciation if it makes a new species. An example is mockingbirds on the Galapagos Islands—one species of mockingbird lives on each island, but all the species split from a shared ancestor species. Groups that are bigger than species can also split from a shared ancestor—for example, reptiles and mammals. A group of living things and their shared ancestor is called a clade.
Living things can evolve to be quite different from their ancestors. As a result, parts of the body can also change. The same bone structure became the hands of humans, the hooves of horses, and the wings of birds. Different body parts that evolved from the same thing are called homologous.
Extinction is when all members of a species die. About 99.9% of all species that have ever lived are extinct. Extinction can happen at any time, but it is more common in certain time periods called extinction events. The most recent was 65 million years ago, when the dinosaurs went extinct.
Origin of life
By comparing fossils and DNA, we know that all life on Earth today had a shared ancestor, called the last universal common ancestor (LUCA). Other living things may have been alive at the same time as the LUCA, but they died out. A study from 2018 suggests that the LUCA is about 4.5 billion (4,500,000,000) years old, nearly as old as the Earth. The oldest fossil evidence of life is about 3.5 billion years old.
How did non-living material become alive? This is a difficult question. The first step must have been the creation of organic compounds. In 1953, the Miller–Urey experiment made inorganic compounds into organic compounds, such as amino acids, using heat and energy.
Life needs a source of energy for chemical reactions. On the early Earth, the atmosphere did not have oxygen. Oxidation using the Krebs cycle, which is common today, was not possible. The Krebs cycle may have acted backwards, doing reduction instead of oxidation, and the cycle may have made larger molecules. To make life, molecules needed to make copies of themselves. DNA and RNA make copies of themselves, but only if there is a catalyst—a compound which speeds up the chemical reaction. One guess is that RNA itself served as a catalyst. At some time, the molecules were surrounded by membranes, which made cells.
Gallery of images of life
Related pages
Artificial life
Biology
Birth
Death
Earliest known life forms
Evolution
Tree of life
References
Life |
426 | https://simple.wikipedia.org/wiki/Law | Law | Law is a set of rules decided by a particular place or authority meant for the purpose of keeping the peace and security of society.
Courts or police may enforce this system of rules and punish people who break the laws, such as by paying a fine, or other penalty including jail. In ancient societies, laws were written by leaders, to set out rules on how people can live, work and do business with each other. But many times in history when laws have been on a false basis to benefit few at the expense of society, they have resulted in conflict. To prevent this, in most countries today, laws are written and voted on by groups of politicians in a legislature, such as a parliament or congress, elected (chosen) by the governed peoples. Countries today have a constitution for the overall framework of society and make further laws as needed for matters of detail. Members of society generally have enough freedom within all the legal things they can choose to do. An activity is illegal if it breaks a law or does not follow the laws.
A legal code is a written code of laws that are enforced. This may deal with things like police, courts, or punishments. A lawyer, jurist or attorney is a professional who studies and argues the rules of law. In the United States, there are two kinds of attorneys - "transactional" attorneys who write contracts and "litigators" who go to court. In the United Kingdom, these professionals are called solicitors and barristers respectively.
The Rule of Law is the law which says that government can only legally use its power in a way the government and the people agree on. It limits the powers a government has, as agreed in a country's constitution. The Rule of Law prevents dictatorship and protects the rights of the people. When leaders enforce the legal code honestly, even on themselves and their friends, this is an example of the rule of law being followed. "The rule of law", wrote the ancient Greek philosopher Aristotle in 350 BC, "is better than the rule of any individual."
Culture is usually a major source of the principles behind many laws, and people also tend to trust the ideas based on family and social habits. In many countries throughout history, religion and religious books like the Vedas, Bible or the Koran have been a major source of law.
Types of law
Medical law is the body of laws concerning the rights and responsibilities of medical professionals and their patients. The main areas of focus for medical law include confidentiality, negligence and other torts related to medical treatment (especially medical malpractice), and criminal law and ethics.
Physician-Patient Privilege protects the patient's private conversations with a medical physician (doctor), this also extends to their personal information (like their contact details) shared with medical personnel.
Property law states the rights and obligations that a person has when they buy, sell, or rent homes and land (called real property or realty), and objects (called personal property).
Intellectual property (IP) law involves the rights people have over things they create, such as art, music, and literature. This is called copyright. It also protects inventions that people make, by a kind of law called patent. It also covers the rights people have to the names of a company or a distinctive mark or logo. This is called trademark.
Trust law (business Law) sets out the rules for money that is put into an investment, such as pension funds that people save up for their retirement. It involves many different types of law, including administrative and property law.
Tort law helps people to make claims for compensation (repayment) when someone hurts them or hurts their property.
Criminal law is used by the government to prevent people from breaking laws, and punish people who do break them.
Constitutional law deals with the important rights of the government, and its relationship with the people. It mainly involves the interpretation of a constitution, including things like the Separation of powers of the different branches of government.
A court order is an official proclamation by a judge that defines and authorizes the carrying out of certain steps for one or more parties to a case.
Administrative law is used by ordinary citizens who want to challenge decisions made by governments. It also involves things like regulations, and the operation of the administrative agencies.
International law is used to set out rules on how countries can act in areas such as trade, the environment, or military action. The Geneva Conventions on the conduct of war and the Roerich Pact are examples of international law.
Custom and tradition are practices that are widely adopted and agreed upon in a society, thought often not in a written form. Custom and tradition can be enforced in courts and are sometimes considered as part of the legal reasoning in matters decided in courts. In some societies and cultures all law is or was custom and tradition, though this is increasingly rare although there are some parts of the world where custom tradition are still binding or even the predominant form of law, for example tribal lands or failed states.
Civil law and common law
Civil law is the legal system used in most countries around the world today. Civil law is based on legislation that is found in constitutions or statutes passed by government. The secondary part of civil law is the legal approaches that are part of custom. In civil law governments, judges do not generally have much power, and most of the laws and legal precedent are created by Members of Parliament.
Common law is based on the decisions made by judges in past court cases. It comes from England and it became part of almost every country that once belonged to the British Empire, except Malta, Scotland, the U.S. state of Louisiana, and the Canadian province of Quebec. It is also the predominant form of law in the United States, where many laws called statutes are written by Congress, but many more legal rules exist from the decisions of the courts. Common law had its beginnings in the Middle Ages, when King John was forced by his barons to sign a document called the Magna Carta.
Religious law
Religious law is law based on religious beliefs or books. Examples include the Jewish Halakha, Islamic Sharia, and Christian Canon law.
Until the 1700s, Sharia law was the main legal system throughout the Muslim world. In some Muslim countries such as Saudi Arabia and Iran, the whole legal systems still base their law on Sharia law. Islamic law is often criticised because it often has harsh penalties for crimes. A serious criticism is the judgement of the European Court that "sharia is incompatible with the fundamental principles of democracy".
The Turkish Refah Party's sharia-based "plurality of legal systems, grounded on religion" was ruled to contravene the European Convention for the Protection of Human Rights and Fundamental Freedoms. The Court decided Refah's plan would "do away with the State's role as the guarantor of individual rights and freedoms" and "infringe the principle of non-discrimination between individuals as regards their enjoyment of public freedoms, which is one of the fundamental principles of democracy".
History of law
The history of law is closely connected to the development of human civilizations. Ancient Egyptian law developed in 3000 BC. In 1760 BC King Hammurabi, took ancient Babylonian law and organized it, and had it chiseled in stone for the public to see in the marketplace. These laws became known as the Code of Hammurabi.
The Torah from the Old Testament is an old body of law. It was written around 1280 BC. It has moral rules such as the Ten Commandments, which tell people what things are not permitted. Sometimes people try to change the law. For example, if prostitution is illegal, they try to make it legal.
Legislature
In democracies, the people in a country usually choose people called politicians to represent them in a legislature. Examples of legislatures include the Houses of Parliament in London, the Congress in Washington, D.C., the Bundestag in Berlin, the Duma in Moscow and the Assemblée nationale in Paris. Most legislatures have two chambers or houses, a 'lower house' and an 'upper house'. To pass legislation, a majority of Members of Parliament must vote for a bill in each house. The legislature is the branch of government that writes laws, and votes on whether they will be approved.
Judiciary
The judiciary is a group of judges who resolve people's disputes and determine whether people who are charged with crimes are guilty. In some jurisdictions the judge does not find guilt or innocence but instead directs a jury, how to interpret facts from a legal perspective, but the jury determines the facts based on evidence presented to them and finds the guilt or innocences of the charged person. Most countries of common law and civil law systems have a system of appeals courts, up to a supreme authority such as the Supreme Court or the High Court. The highest courts usually have the power to remove laws that are unconstitutional (which go against the constitution).
Executive (government) and Head of State
The executive is the governing center of political authority. In most democratic countries, the executive is elected from people who are in the legislature. This group of elected people is called the cabinet. In France, the US and Russia, the executive branch has a President which exists separately from the legislature.
The executive suggests new laws and deals with other countries. As well, the executive usually controls the military, the police, and the bureaucracy. The executive selects ministers, or secretaries of state to control departments such as the health department or the department of justice.
In many jurisdictions the Head of State does not take part in the day-to-day governance of the jurisdiction and takes a largely ceremonial role. This is the case in many Commonwealth nations where the Head of State, usually a Governor almost exclusively acts "on the advice" of the head of the Executive (e.g. the Prime Minister, First Minister or Premier). The primary legal role of the Head of State in these jurisdictions is to act as a check or balance against the Executive, as the Head of State has the rarely exercised power to dissolve the legislature, call elections and dismiss ministers.
Other parts of the legal system
The police enforce the criminal laws by arresting people suspected of breaking the law. Bureaucrats are the government workers and government organizations that do work for the government. Bureaucrats work within a system of rules, and they make their decisions in writing.
Lawyers are people who have learned about laws. Lawyers give people advice about their legal rights and duties and represent people in court. To become a lawyer, a person has to complete a two- or three-year university program at a law school and pass an entrance examination. Lawyers work in law firms, for the government, for companies, or by themselves.
Civil society is the people and groups that are not part of government that try to protect people against human rights abuses and try to protect freedom of speech and other individual rights. Organizations that are part of civil society include political parties, debating clubs, trade unions, human rights organizations, newspapers and charities.
"Corporations are among the organizations that use the legal system to further their goals. Like the others, they use means such as campaign donations and advertising to persuade people that they are right. Corporations also engage in commerce and make new things such as automobiles, vaporisers/e-cigarettes, and Unmanned aerial vehicles (i.e. "drones") that the old laws are not well equipped to deal with. Corporations also makes use of a set of rules and regulations to ensure their employees remain loyal to them (usually presented in a legal contract), and that any disobedience towards these rules are considered uncivilized and therefore given grounds for immediate dismissal.
Related pages
Constitution
Death penalty
Ethics
Legal code
Legal rights
Parliament
Physical law
Political economy
Further reading
H.L.A. Hart, The Concept of Law, (Penelope A. Bullock & Joseph Raz eds. 2nd ed. 1994) (1961).
Sandro Nielsen: The Bilingual LSP Dictionary. Principles and Practice for Legal Language. Benjamins 1994.
A Companion to Contemporary Political Philosophy. edited by Robert E. Goodin and Philip Pettit. .
Johnson, Alan (1995). The Blackwell Dictionary of Sociology. Blackwells publishers. .
Handbook of Political Institutions. edited by R. A. W. Rhodes, Sarah A. Binder and Bert A. Rockman. Oxford University Press.
An Introduction to IP Law. edited by John Watts. Oxford University Press. Available at Patent Professionals LLC
References
Other websites
Law -Citizendium |
428 | https://simple.wikipedia.org/wiki/L.%20L.%20Zamenhof | L. L. Zamenhof | Ludwik Lejzer Zamenhof (; , ; – ), credited as L. L. Zamenhof and sometimes as the pseudonymous Dr. Esperanto, was an eye doctor, linguist (who creates a language), and scholar who created the international language Esperanto.
Biography
Zamenhof was born in 1859 in the town of Białystok, Poland. At the time, Poland was a part of the Russian Empire. Bialystok contained three major groups: Poles, Belorussians, and Yiddish-speaking Jews. Zamenhof thought that one common language would join these groups and stop fights between them.
His first language was said to be Polish. His parents spoke Russian and Yiddish at home. His father was a German teacher, so Zamenhof learned that language from an early age and spoke the language fluently. Later he learned French, Latin, Greek, Hebrew and English. He also had an interest in Italian, Spanish and Lithuanian.
Zamenhof decided that the international language must have a simple grammar and be easier to learn than Volapük, an earlier international language. He attempted to create the international language with a grammar that was rich, and complex. The basics of Esperanto were published in 1887. He translated the Hebrew Bible into Esperanto.
His grandson, Louis-Christophe Zaleski-Zamenhof, was an engineer.
He was 14 times nominated for the Nobel Peace Prize between 1907 and 1917.
References
1859 births
1917 deaths
Bible translators
Esperantists
Inventors
Jewish scientists
Legion of Honour
Linguists
Polish Jews
Polish scientists
Zionists |
430 | https://simple.wikipedia.org/wiki/List%20of%20countries | List of countries | This is a list of sovereign states. Disputed countries are listed at the bottom.
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431 | https://simple.wikipedia.org/wiki/Provinces%20and%20territories%20of%20Canada | Provinces and territories of Canada | Canada is a country and sovereign state in the north of North America. It is made up of thirteen administrative divisions: ten provinces and three territories.
The different levels of government in Canada are based on the principles of a federation: the governments of each province and territory share power with the federal government. The territories' governments have a more limited set of powers than the federal government.
The provinces are in the south of Canada, near the border with the United States. They go from the Atlantic Ocean in the east to the Pacific Ocean in the west. The territories are to the north, where fewer people live, close to the Arctic Circle and Arctic Ocean.
Here is a list of the provinces and territories, and their standard abbreviations, with their capitals (the cities where their governments are based) and largest cities. Canada's national capital, where the federal government meets, is Ottawa.
References
Canada geography-related lists |
432 | https://simple.wikipedia.org/wiki/Las%20Vegas | Las Vegas | Las Vegas is a city in the American state of Nevada. There were 641,903 people living in the city in 2020, and more than 2,000,000 people living in the metropolitan area. It is the largest city in Nevada. Las Vegas is also the county seat of Clark County.
Las Vegas is famous for its casinos and resort hotels. It is one of the world's most popular places for tourism.
Hispanics (especially Mexicans and Cubans) and white people are the largest racial and ethnic groups in Las Vegas. Las Vegas has many Italians, Germans, English people and Irish people.
Politics
Las Vegas leans to the left. Three of the four congressional districts in Nevada include parts of Las Vegas, and all three congresspeople representing those districts are Democrats from Las Vegas.
History
Native Americans were the first to reside in the area, specifically the Paiute tribe. It was first called Las Vegas (which means The Meadows in the Spanish language) by the Spanish. The city is known for its dry weather, as is the rest of southern Nevada. It is surrounded by desert.
The US Army built Fort Baker there in 1864. Las Vegas has natural springs, where people used to stop for water when they were going to Los Angeles or other places in California.
In 1905, 110 acres owned by William A. Clark, on which he built a railroad to Southern California were auctioned and Las Vegas was founded as a railroad town. Las Vegas officially became a city in 1911.
The Hispanic population in Las Vegas is growing and has rapidly increased. Most Latino Las Vegas residents are of Mexican, Cuban and Salvadoran descent. Las Vegas also has a small Puerto Rican, Guatemalan, Spaniard, Peruvian, Colombian, Honduran, Nicaraguan and Argentine population. The most common European ancestries in Las Vegas are German, Irish, Italian, Polish, French, Scottish, Russian, Swedish, Norwegian, Dutch and Welsh. Filipino, Korean, Vietnamese, Japanese, Indian and Chinese are the most common Asian ancestries.
People
There is a Mexican, Chinese, Greek, German, Korean, Japanese, French, Arab, Italian, Jewish, African-American, Turkish, Croatian, Polish, Filipino, Indian, Ethiopian and Chilean community in Las Vegas.
Las Vegas has a growing Hispanic population. Many Hispanics in Las Vegas are of Mexican, Cuban and Salvadoran ancestry.
Most of the foreign-born population were born in Mexico, the Philippines and El Salvador.
References
County seats in Nevada
1905 establishments in the United States
20th-century establishments in Nevada |
433 | https://simple.wikipedia.org/wiki/Lanai | Lanai | Lanai (or Lānaʻi) is sixth largest of the Hawaiian Islands, in the United States. It is also known as the "Pineapple Island". The island is almost a circle in shape and is 18 miles wide in the longest direction. The land area is 140 sq. miles (367 km2). It is separated from the island of Moloka'i by the Kalohi Channel to the north.
History
Lana'i was first seen by Europeans on 25 February 1779 by Captain Clerke, with HMS Resolution on the James Cook Pacific Ocean trip. Clerke took command of the ship after Capt. Cook was killed at Kealakekua Bay on February 14, and was leaving the islands for the North Pacific.
In 1922, Jim Dole, the president of Dole Pineapple Company, bought the island of Lana'i. He made a large part of it into the world's largest pineapple plantation.
Tourism
Tourism on Lana'i started not long ago. That was when the growing of pineapple was slowly coming to an end in the Islands. On Lana'i, you can be with nature and feel the mood of the Hawaiian countryside. Not like nearby O'ahu, the only town (Lana'i City) is small. It has no traffic or shopping centers. Tourists come mainly to relax.
There are three hotels on Lana'i and several golf courses.
Islands of Hawaii |
434 | https://simple.wikipedia.org/wiki/Leap%20year | Leap year | A leap year is a calendar year in which an extra day is added to the Gregorian calendar, which is used by most of the world. A common year has 365 days, but a leap year has 366 days. The extra day, February 29, is added to the month of February. In a common year, February has 28 days, but in a leap year it has 29 days. The extra day, called a leap day, occurs on the same day of the week as the first day of the month, February 1. Additionally, a leap year does not begin and end on the same day of the week, as a common year does.
Leap years are evenly divisible by 4. The most recent leap year was 2020 and the next leap year will be 2024. However, any year that is evenly divided by 100 would not be a leap year unless it is evenly divided by 400. This is why 1600, 2000, and 2400 are leap years, while 1700, 1800, 1900, 2100, 2200, and 2300 are common years, even though they are all divisible by 4.
We have leap years because instead of 365 days, the Earth really takes a few minutes less than 365-1/4 days (365.24219) to go completely around the Sun. Without leap years, the seasons would start one day earlier on the calendar every four years. After 360 years, spring in the Northern Hemisphere and autumn in the Southern Hemisphere would begin on December 21 (which is when winter in the Northern Hemisphere and summer in the Southern Hemisphere presently begins).
A number of countries use a lunar calendar (based on the Moon, instead of the Sun, like our solar calendar is). They have leap years when they add an extra lunar month. Different calendars add the extra month in different ways. So a year which has 366 days instead of 365 days where the month of February has 29 days is called a leap year.
In a leap year, the corresponding months are January, April, and July, February and August, March and November, and September and December. No month corresponds to May, June, or October.
In the Gregorian calendar, 97 out of every 400 years are leap years. In the outdated Julian calendar, 100 years out of every 400 are leap years. All other years are common years.
Related pages
February 29
Common year
Century leap year
Years |
443 | https://simple.wikipedia.org/wiki/Leather | Leather | Leather is the skin of an animal made into a durable material by tanning. The skins of cows, pigs, and goats are often used to make leather. Skins of snakes, alligators or crocodiles, and ostriches are sometimes used to make fancier leather. Shoes, bags, clothes, and balls are often made of leather. Sometimes people make leather out of whales, ducks, giraffes, and African elephants. All of these ways of making leather are very simple but some are rare.
How leather is made
The way leather is made is divided into three processes. They are preparing the leather, tanning it, and crusting.
In preparing the leather, many things are done to make it ready for tanning. They include soaking it, removing the hair, liming, deliming, bating, bleaching, and pickling.
Tanning is a process that makes the proteins, especially collagen, in the raw hide stable. It increases the thermal and chemical stability of the animal skins. The difference between fresh and tanned animal skin is that fresh animal skin dries to make it hard and stiff. When water is added to it, it becomes bad. But, animal skin that is tanned dries to make it flexible. It does not become bad when water is added to it.
Crusting is a process that makes the leather thin and lubricates it. Chemicals added when crusting must be set in place. Crusting ends with drying and making the leather soft. It may include splitting, shaving, dyeing, whitening or other methods.
From other animals
Today, most leather is made from the skin of cattle, which makes up about 67% of all the leather made. Other animals that are used include sheep (about 12%), pigs (about 11%), and goats (about 10%).
Horse skin is used to make strong leather. Lamb and deerskin are used for soft leather. It is used in work gloves and indoor shoes.
Kangaroo leather is used to make things that must be strong and flexible. It is used in bullwhips.
In Thailand, stingray leather is used in wallets and belts. Stingray leather is tough and durable.
References
Natural materials |
444 | https://simple.wikipedia.org/wiki/License | License | A license (in American English) or licence (in British English) allows someone to do something that they otherwise are not allowed to do. A person usually has to pay some money, and maybe pass a test to get a license. A license is usually written but it does not have to be. Most kinds of licenses can only be used by the person they were given to. Licenses may be temporary or permanent. Some licenses can not be taken away once they are given. A person with a license is called a licensee.
In many countries, if a person tries to do something without the correct license to do it, they might have to pay a fine or go to prison.
Examples of licenses
There are many different types of licenses.
Driver's license
The laws of most countries say that people are only allowed to drive cars if they have a driver's license. If a person does not have a license, they may have to pay a fine if they are caught by the police. In many countries, a person must take a test and pay money to get a license. The test would check that they know the road rules, and have the skill to drive a car.
Hunting license
Other licenses give permission to shoot animals (often called a hunting license). The hunting license usually says when a person may hunt. A hunter may have to pass a test to show that they understand the rules about hunting.
Television licence
In the United Kingdom and the Republic of Ireland, if someone has a television set, they must buy a "television licence" every year.
Copyright licenses
Copyright is a law that gives the owner of a creative work the right to decide what other people can do with it. A person or a company can give a license to a copyright that they own. So in order for another person to use an owner's copyright they need permission from the owner. For example, when someone buys computer software, they also need a license from the creator of the software (a copyright owner) allowing the buyer to use the software.
Difference between license and licence
"License" is a verb and "licence" is a noun. "Licensing sessions" were the meetings of magistrates which decided about giving licences to sell alcohol.
In American English there is no difference in spelling between the verb "to license" meaning to give permission, and the noun "a license" meaning the permission to do something.
Distinction between a licence and a qualification
A degree in medicine is a qualification showing a person has successfully studied medicine. It is awarded for life. A licence to practice medicine is a legal permission to do so within the territory covered by the licensing authority. The licence may be taken away ('revoked') in certain situations.
Related pages
Copyright
Patent
Trademark
References
Law |
445 | https://simple.wikipedia.org/wiki/Link | Link | A link, also hyperlink in computing, is a part of a chain. A chain is made of many pieces of metal; each piece is a link.
Today, people also use the word link in a new way. The World Wide Web on the Internet is made of many different Web pages. The computer software that people use to make these pages (HTML) lets us go to other pages in a very fast and easy way.
The person who makes the web page can tell the computer to show a word or a picture on the Web page as a link. This means that when we click on the link with our computer mouse, the computer will show us the new page we want to see. Most links are blue, but they can be any color.
The color of the link will change to dark blue when clicked as the web browser recognises it in the browser's cache. Unless the cache is cleared, the link will always stay dark blue.
Ways of making links
There are many ways in making a link on a web page. The process is different for different internet software.
Plain HTML
In .htm and .html files, a link can be created using this code:
<a href="http://www.example.com">Text of link</a>
WikiSyntax
WikiSyntax like MediaWiki uses a simpler way of making links. To create a link to another page of the same website:
[[Page name|Link text]] or just [[Page name]].
To link to an external website:
[http://www.example.com Link text], [http://www.example.com], or just http://www.example.com.
BB code
BB code is used in forum software. To create a link:
[url]http://www.example.com[/url], or [url=http://www.example.com]Link text[/url]
Internet |
446 | https://simple.wikipedia.org/wiki/Library | Library | A library is a place where many books are kept. Most libraries are public and let people take the books to use in their home. Most libraries let people borrow books for several weeks. Some belong to institutions, for example, companies, churches, schools, and universities. The people who work in libraries are librarians. Librarians are people who take care of the library.
Other libraries keep famous or rare books. There are a few "Copyright libraries" which have a copy of every book which has been written in that country. Some libraries also have other things that people might like, such as magazines, music on CDs, or computers where people can use the Internet. In school they offer software to learn the alphabet and other details.With the spread of literacy, libraries have become essential tools for learning. Libraries are very important for the progress and development of a society. Libraries are collections of books and other informational materials, however a library can also be a collection of items or media. People come to libraries for reading, study or reference. Libraries contain a variety of materials. They contain printed materials, films, sound and video recordings, maps, photographs, computer software, online databases, and other media.
A library is not a bookstore (a store that sells books).
Importance of a Library
The prime purpose of a library is to provide access to knowledge and information. To fulfil this mission, libraries preserve a valuable record of culture. Then they pass down this to the coming generations. Therefore, they are an essential link between the past, present and future.
People use libraries to work. They also use library resources to learn about personal interests. Sometimes, they get recreational media such as films and music. Students use libraries to study.
Libraries help the students to develop good reading and study habits. Public officials use libraries for research and public issues. The libraries provide information and services that are essential for learning and progress.
Public libraries
Many places have a public library, where anybody can join if they live in the area. With a library card, people can borrow books and take them home for several weeks. It does not cost money to get a library card at most public libraries.
Books are kept on shelves in a special order so they are easy to find. Public libraries have lot of books on various topics including story books and many others. Many public libraries have books and CDs about learning English. Stories are kept in alphabetical order by the last name of the person who wrote them, the writer. Books about other things are often given a special number, that refers to what they are about. They are then put on the shelf in number order. One number system used by many libraries is the Dewey decimal system.
Mobile libraries
In rural areas books may be taken in a bookmobile, or mobile library to remote places.
Academic libraries
Many colleges and universities have large academic libraries. These libraries are for the use of college students, professors, and researchers. Academic libraries are used mainly for doing research like studying the solar system or how earthquakes happen. These libraries do not have the same types of books you would find in a public library. They usually do not have fiction books or books for children (unless they are being studied). Academic libraries can have many books, sometimes more than a million.
Special libraries
Special libraries are those libraries that are not public libraries or academic libraries. They are usually small. Many times a special library holds books on a particular subject or even a special kind of book. Some special libraries keep just old books or books by Shakespeare. A special library can be owned by a business for use only by that business. For example, Disney World in Orlando has its own library that is not open to the public but for the use of the people who work for the company.
Librarians
A librarian is a person who works in a library. Librarians help people find books and information. They can teach people how to find books and use the library. A professional librarian is a person who went to school to study library science. They can earn a degree called a Masters in Library Science.
History
The earliest known library was discovered in Iraq and belonged to the ancient civilization in Sumer. They didn't use paper books but instead wrote everything on clay tablets using a style of writing called cuneiform. These tablets are over 5,000 years old. The Library of Alexandria, in Egypt, was the largest and most important library of the ancient world. It was destroyed when the Romans conquered Egypt in 30 BC. Rome’s first public library was established by Asinius Pollio who was a lieutenant of Julius Caesar. Eventually Rome would build 28 public libraries within the city. When the Roman Empire fell in 330 AD, many books went east to the city of Byzantium where a large library was built. Other libraries were built in monasteries and public homes.
Libraries began to appear in many Islamic cities, where science and philosophy survived after the fall of the Roman Empire. Christian monks and Islamic libraries exchanged books to copy.
Recent times
COVID-19 pandemic has further changed how libraries operate in year 2020 and many of them around the world were faced with really hard choices as to which services to offer and which services to shut down for a limited time.
Related pages
Archive
Bookcase
References |
448 | https://simple.wikipedia.org/wiki/List%20of%20mathematics%20topics | List of mathematics topics | There are a number of topics in mathematics. Some of them include:
Algebra
Analysis
Arithmetic
Calculus
Combinatorial game theory
Cryptography
Differential equations
Partial differential equations
Ordinary differential equation
Discrete mathematics
Geometry
Graph theory
Infinity
Linear algebra
Number theory
Numerical analysis
Numerical integration
Numerical linear algebra
Validated numerics
Order of Operations
Probability
Statistics
Topology
Trigonometry
Related pages
List of mathematicians
Mathematics Genealogy Project
Mathematics Subject Classification
Timeline of women in mathematics
Mathematical societies
American Mathematical Society
Society for Industrial and Applied Mathematics
Other websites
For a much more complete list of mathematics topics, see Math Topics from the Internet Mathematics Library
Topics |
450 | https://simple.wikipedia.org/wiki/Like | Like | Like can mean some different things:
1. We can use to like to say that we find a thing is good:
I like my house. = I think my house is good.
I like Jenny = I think Jenny is an OK person.
2. We can use like for "the same as" or "nearly the same as":
This cheese sandwich feels like rubber = the sandwich is difficult to eat, nearly the same as rubber.
Jenny is like her mother = Jenny has brown hair, and her mother also has brown hair (for example).
Your pen is like my pen = Your pen and my pen are the same sort.
3. We can also use like for "the same way as":
She runs like the wind - she and the wind are both fast.
She talks like a child - she and children speak slowly or with a high voice.
4. In a question, we can use like to ask people to talk about a thing, or to say if they find it good or not:
What's your house like? (Answer: "It has two bedrooms and a big kitchen...")
What was the film like? (Answer: "It was very good!")
5. We can also use like as "for example":
I often go to other countries, like France or Germany = I go to other countries, for example France and Germany.
6. In British and American English young people, when talking, have recently started using like as an extra word in the middle of sentences. Sometimes they use it to report what someone said, especially when mimicking the way they said it. This should never be used in writing:
The teacher was like: "Don't do that!"
As works in the same way as example 2 - comparing two things using either the word "like" or the word "as" is called making a simile (As big as an elephant). It may be better to use the word "as" for this to stop confusion with example 1.
Basic English 850 words |
453 | https://simple.wikipedia.org/wiki/Political%20divisions%20of%20China | Political divisions of China | There are twenty-three provinces, four municipalities, five autonomous regions and two special administrative regions in the People's Republic of China. Provinces are pronounced Shěng in Chinese Pinyin. The island of Taiwan is claimed as a province by the People's Republic of China (PRC), but it is not under their control. Taiwan is an island known as Republic of China (Taiwan).
Provinces and autonomous regions are broken into prefectures and sub-provincial cities.
Provinces
There are 23 provinces in the People's Republic of China.
Anhui
Fujian
Gansu
Guangdong
Guizhou
Hainan
Hebei
Heilongjiang
Henan
Hubei
Hunan
Jiangsu
Jiangxi
Jilin
Liaoning
Qinghai
Shaanxi
Shandong
Shanxi
Sichuan
Taiwan*
Yunnan
Zhejiang
* The island of Taiwan is claimed as a province by the People's Republic of China (PRC), but it is not under their control. Taiwan is an island known as Republic of China (Taiwan).
Municipalities
There are 4 municipalities in the People's Republic of China. "Municipality" is the common English name for the Chinese zhíxiáshì, meaning a city directly controlled by the national government.
Beijing, formerly part of Hebei
Tianjin, formerly part of Hebei
Shanghai, formerly part of Jiangsu
Chongqing, formerly part of Sichuan
Autonomous Regions
There are 5 autonomous regions in the People's Republic of China. "Autonomous region" is the common English name for the Chinese zìzhìqū, meaning an area with greater levels of self-government to accommodate minority groups.
Xinjiang, for the Uygurs and other Turkic peoples
Tibet, for Tibetans
Inner Mongolia, for Mongolians
Guangxi, for the Zhuang
Ningxia, for the Hui
Special Administrative Regions
There are 2 special administrative regions in the People's Republic of China. "Special administrative region" is the common English name for the Chinese tèbié xíngzhèng qū, meaning an area under special administration as a result of treaties that returned former European colonies to Chinese control.
Hong Kong, formerly a British colony
Macau, formerly a Portuguese colony |
454 | https://simple.wikipedia.org/wiki/List%20of%20fruits | List of fruits | Fruits on this list are defined as the word is used in everyday speech. It does not include vegetables, whatever their origin.
The following items are fruits, according to the scientific definition, but are sometimes considered to be vegetables:
Related pages
List of vegetables
Food-related lists
Lists of plants |
457 | https://simple.wikipedia.org/wiki/Legislature | Legislature | Legislature is a word that comes from the Latin language, meaning "those who write the laws." A legislature is therefore a group of people who vote for new laws, for example in a state or country.
Each person in the legislature is usually either elected or appointed. The constitution of that state or country usually tells how a legislature is supposed to work.
In many countries, the legislature is called a Parliament, Congress, or National Assembly. Sometimes there are two groups of members in the legislature. This is called a "bicameral" legislature. A unicameral legislature has only one group of members.
A country, district, city, or other small area may also have something like a legislature. These are often called councils, and they make smaller laws for their areas.
List of titles of legislatures
National
Parliament
Congress
Diet
National Assembly
Althing — Iceland
Assembleia da República — Portugal
Bundestag — Germany
Riksdag — Sweden
Cortes Generales — Spain
Eduskunta — Finland
Federal Assembly — Russia, Switzerland
Folketing — Denmark
Stortinget — Norway
Knesset — Israel
Assembly of Albania — Albania
Legislative Yuan — Republic of China/Taiwan
moganane — Iran
United States Capitol - United States
Sub-National
List of state legislatures of the United States — United States
General Assembly / Assembly
Great and General Court / General Court
House of Delegates
Landtag — Germany, Austria
Canada
Legislative Assembly — All provinces and territories except:
National Assembly — Quebec
House of Assembly — Nova Scotia and Newfoundland and Labrador
Australia
Legislative Assembly - All States and Territories except:
House of Assembly - South Australia and Tasmania
Legislative Council - All States except Queensland
United Kingdom
Scottish Parliament — Scotland
Northern Ireland Assembly — Northern Ireland
National Assembly for Wales — Wales
Houses of Parliament — United Kingdom overall. |
459 | https://simple.wikipedia.org/wiki/Linear%20algebra | Linear algebra | Linear algebra is a branch of mathematics. It came from mathematicians trying to solve systems of linear equations. Vectors and matrices are used to solve these systems. The main objects of study currently are vector spaces and linear mappings between vector spaces. Linear algebra is useful in other branches of mathematics (e.g. differential equations and analytic geometry). It can also be applied to the real world in areas such as engineering, physics and economics.
Linear algebra describes ways to solve and manipulate (rearrange) systems of linear equations.
For example, consider the following equations:
These two equations form a system of linear equations.
It is linear because none of the variables are raised to a power.
The graph of a linear equation in two variables is a straight line.
The solution to this system is:
This is because it makes all of the original equations valid, that is, the value on the left side of the equals sign is exactly the same as the value on the right side for both equations.
Linear algebra uses a system of notation for describing system behavior, called a matrix. For the previous example, the coefficients of the equations can be stored in a coefficient matrix.
Related pages
Abstract algebra
Matrix analysis
Matrix function
Numerical linear algebra
System of linear equations
Further reading
Israel Gelfand (1998), Lectures on linear algebra, Courier Dover Publications.
Linear algebra |
460 | https://simple.wikipedia.org/wiki/London | London | London is the capital of the United Kingdom (UK), and its largest city. It is also the city with the highest population in the UK. The population is just under 9 million. The city is the largest in western Europe by population and area.
On the Thames, London has been a central city since it was founded by the Romans two millennia ago as Londinium. The Romans bridged the river Thames and built a road network to connect Londinium with the rest of the country.
London's original city centre, the City of London is England's smallest city. In 2011 it had 7,375 inhabitants on an area of 1.12 square miles. The term "London" is used for the urban region which developed around this city centre. This area forms the region of London, the Greater London administrative unit led by the Mayor of London and the London Assembly.
London is one of the world's most important political, economic and cultural centres. London was the capital of the British Empire and so for almost three centuries the centre of power for large parts of the world.
The city has about 9.1 million inhabitants (2018). If one counts the entire metropolitan area of London (London Metropolitan Area), it has about 15 million people. The climate is moderate.
History
The Romans built the city of Londinium along the River Thames in AD 43. The name Londinium (and later 'London') came from the Celtic language of the Ancient Britons. In AD 61, the city was attacked and destroyed. Then the Romans rebuilt the city, and London became an important trading hub.
5th century: end of Roman rule to 12th century
After the decline of the Roman Empire, few people remained in London. The Anglo-Saxon people of sub-Roman Britain were mainly agricultural. Once the Romans had gone, trade with Continental Europe dwindled. In the 9th century, more people started living in London again. It became the largest city in England. However, it did not become the capital city of England again until the 12th century. For a long time after the Romans, England was not unified, and so had no capital.
15th/16th century
Trade grew and the East India Company was founded as a monopoly trader. Trade expanded to the New World. London became the main North Sea port, and migrants went from England and abroad. The population rose from about 50,000 in 1530 to about 225,000 in 1605.
17th century
The 17th century saw Londoners suffer from the plague and the fire of London. The century starts with the famous Gunpowder Plot.
In the 17th century the Stuart kings ruled: James I and Charles I. Charles Stuart was defeated by Cromwell, so the century was remarkable in that respect. Cromwell marks the beginning of the modern system whereby Parliament is more important than the monarch. The war between Cromwell and Charles was bitterly fought. London was the key city, and Oxford was also important.
The century also had two great disasters: the Great Plague and the Great Fire of London. The control of London by Cromwell and Parliament was one of the decisive factors in the civil war. Cromwell's victory was followed by his death in 1658, and the country for a time moved back to royal rule under Charles II.
The plague virus, carried by fleas on rats, came to Britain from Europe.
The Great Fire of London broke out at the beginning of September 1666. Unfortunately there were warehouses full of timber, pitch, tallow, wine and tar. These caught fire and, in the end, all the riverfront buildings were destroyed. The fire eventually destroyed about 60% of the city, (mainly the City of London, rather than the large city we have today). Old St Paul's Cathedral was destroyed. Some fires burnt more widely, up to present-day Southwark and even Highgate (which are not in the city, but are in London).
Modern era
Another famous old part of Greater London is Westminster, which was a different city from the City of London. In Westminster is Westminster Abbey (a cathedral), the Palace of Westminster (the Houses of Parliament, and 10 Downing Street (where the Prime Minister lives).
After the railways were built, London grew much larger. Greater London has 33 boroughs (neighbourhoods) and a mayor. The old City of London is only a square mile in size but has its own Lord Mayor.
Expansion of London
In stages, London has several times increased in size by statute in Parliament. The main motive for this has been taxation, and the increase in houses in what was once countryside. Since taxation was paid to the counties surrounding London, there was a motive for absorbing the countryside into London. This happened in several stages.
Outside London, local taxes are paid to the County Councils; inside London they are paid to the Greater London Council. One county has been lost entirely (Middlesex) and all the others have lost land and revenue. The London Boroughs and the GLA (Greater London Authority) both raise taxes, and the representatives are elected. There is a London Plan which sets out the priorities. The number of local authorities which raise local taxes and spend it is 33: 32 London boroughs and the City of London.
Geology
One aspect of its geology had big consequences. North of the Thames London is on chalk, which is easy (with modern equipment) to tunnel through. South of the Thames London is on clay, which was, and still is, much more difficult to dig out. So most of the subterranean engineering is north of the Thames. The road system south of the Thames is also inadequate by modern standards. This difference is reflected in the prices for property, the road transport, the Underground railway and the definition of "London" as a taxable area. The growth of London has been more vigorous North of the Thames, and has included the complete absorption of Middlesex, once a separate county.
Events
AD 43 Londinium is founded by the Romans.
61 – Londinium is sacked by Queen Boudica and the Iceni.
100 – Londinium becomes the capital of Roman Britain.
200 – The population is about 6,000.
410 – the end of Roman rule in Britain
8th century – London is captured by Vikings.
885 – King Alfred the Great recaptures the city and makes peace with the Viking leader Guthrum.
1045/50 – Westminster Abbey is rebuilt by Edward the Confessor who is buried there in January 1066.
1066 – William the Conqueror is crowned in Westminster Abbey.
1100 – The population is about 16,000.
1300 – The population of London has risen to 100,000.
1381 – the Peasants' Revolt – the first poll tax riots
1605 – The Gunpowder Plot is stopped.
1642 – The English Civil War starts.
1647 – London supports Cromwell's army.
1665 – the Great Plague of London
1666 – the Great Fire of London
1700s – the Georgian era (the time of George III)
1780 – the Gordon Riots
1900s – Canals, railways, bridges. British Empire.
1851 – The Great Exhibition is held at the Crystal Palace.
1908 – The Olympic Games take place in London.
1940/1941 – London was bombed by German planes during World War II: explosive and incendiary bombs. This was known as The Blitz.
1944/45 – London bombed by V-1 flying bomb and later the V2 rockets.
1948 – The Summer Olympic Games take place in London for the second time.
1966 – The Football World Cup final took place in London. It was won by England.
1990 – the Second Poll Tax Riots
2005 – The 7 July bombings on the London Underground and a bus. 52 people die and over 700 people are injured.
2012 – The Summer Olympic Games take place in London for a third time.
2017 – There were two terrorist attacks. The first happened in March on Westminster Bridge and Parliament Square. Five people were killed outside the Palace of Westminster, including the attacker and a police officer. 40 more people were injured. Another attack happened on London Bridge in June. Seven people were killed before the Metropolitan Police shot down the three attackers near Borough Market. The Islamic State has said they were responsible for both attacks.
2020 – COVID-19 did not affect London much until the Spring of 2020. From then until mid 2022, every aspect of life was affected. Government regulation of private life was almost unknown except in wartime (WWII). Many aspects of consumer activity have taken time to recover. Education of young people was interrupted, shops closed and all forms of live mass entertainment were banned.
Landmarks
Big Ben (Elizabeth Tower)
Buckingham Palace
Millennium Dome
London Eye
Nelson's Column in Trafalgar Square
Tower Bridge
London Underground
Natural History Museum
St. Paul's Cathedral
Palace of Westminster
The Shard
Alexandra Palace
Tower of London
Business and economy
London has five major business districts: the City, Westminster, Canary Wharf, Camden & Islington and Lambeth & Southwark.
The London Stock Exchange is the most international stock exchange and the largest in Europe.
Financial services
London's largest industry is finance. This includes banks, stock exchanges, investment companies and insurance companies The Bank of England is in the City of London and is the second oldest bank in the world.
Professional services
London has many professional services such as law and accounting firms.
Media
The British Broadcasting Company (BBC), which has many radio and TV stations, is in London.
Tourism
Tourism is one of London's biggest industries. London is the most visited city in the world by international tourists with 18.8 million international visitors per year. Within the UK, London is home to the ten most-visited tourist attractions. Tourism employed about 350,000 full-time workers in London in 2003. Tourists spend about £15 billion per year.
Technology
A growing number of technology companies are based in London.
Retail
London is a major retail centre, and in 2010 had the highest non-food retail sales of any city in the world, with a total spend of around £64.2 billion. The UK's fashion industry, centred on London, contributes tens of billions to the economy.
Manufacturing and construction
For the 19th and much of the 20th centuries London was a major manufacturing centre (see Manufacturing in London), with over 1.5 million industrial workers in 1960. Many products were made in London including ships, electronics and cars. Nowadays, most of these manufacturing companies are closed but some drug companies still make medicine in London.
Transportation (trains, airports and underground)
The city has a huge network of transport systems including trains, underground (metro) and five main airports.
The Victorians built many train systems in the mid-19th century (1850s). Their main stations are in London, and the lines go to every part of Great Britain. There were originally five major companies but the five companies became a national rail network in modern times. Their terminals at King's Cross, St. Pancras, Paddington, Waterloo and Charing Cross are still used as terminals.
There are five airports, though only one is actually in London (London City Airport). The most used airport is Heathrow Airport, although it is actually outside the city. There is the London end of the LondonBirmingham canal, which was important to the industrial 19th century. Really heavy goods can be transported on water by canal or sea.
The London Underground is a system of electric trains which are in London. It is the oldest underground railway in the world. It started running in 1863 as the Metropolitan Railway. Later, the system was copied in other cities, for example Paris, New York, Moscow and Madrid. Even though it is called the London Underground, about half of it is above the ground. The "Tube" is the name used for the London Underground, because the tunnels for some of the lines are semi-round tubes running through the ground. The Underground has 274 stations and over 250 miles (402 km) of track. Over one billion passengers used the underground each year.
With the need for more rail capacity in London, the Elizabeth Line (also known as Crossrail) opened in May 2022. It is a new railway line running east to west through London, with a branch to Heathrow Airport. It is Europe's biggest construction project, with a £15 billion projected cost.
There is a black taxi system regulated by the Metropolitan Police, and various other private enterprise hire car companies. Efforts are being made to make roads safer for cyclists.
Sewage tunnel
London's biggest tunnel has just been completed to take sewage from the capital to the East where it will be processed.
Climate
London has a temperate oceanic climate (Köppen climate classification: Cfb). It is not usually very hot or cold. It is often cloudy.
Summers are generally warm, sometimes hot. Winters are generally cool. Spring and autumn are mild.
London has regular, light rain throughout the year. July is the warmest month, with an average temperature at Greenwich of 13.6 °C to 22.8 °C. The coldest month is January, with an average of 2.4 °C to 7.9 °C. The average annual precipitation is fairly low at 583.6 mm, and February is normally the driest month. Drought is sometimes possible, especially during longer heatwaves in summer. Snow is uncommon but usually falls at least once each winter and heavy snow is rarer and does not happen every winter. While snow is uncommon in central London itself, there is more snow in the outer areas; this is because the "urban heat island" the big city generates makes the city about 5 °C warmer than surrounding areas in winter.
Temperature extremes in London range from at Heathrow Airport on 19 July 2022 down to at Northolt on 1 January 1962.
Twinnings
London has twin and sister city agreements with these cities:
Sister cities:
Berlin, Germany (since 2000)
New York City, USA (since 2001)
Moscow, Russia
Beijing, China (since 2006)
Partner cities:
Paris, France (since 2001)
Rome, Italy
London also has a "partnership" agreement with Tokyo, Japan.
References
Other websites
London City Government
WorldFlicks in London: Photos and interesting places on Google Maps. .
Events in London
Olympic cities |
461 | https://simple.wikipedia.org/wiki/Litre | Litre | A litre (international spelling) or liter (American spelling) is one of the metric units of volume. It is not a basic SI unit, but it is a supplementary unit.
One litre is the volume of 1000 cubic centimetres, that is a cube of 10 × 10 × 10 centimetres (1000 cm3). One litre of water at has the mass of exactly one kilogram. This results from the definition given in 1795, where the gram was defined as the weight of one cubic centimetre of melting ice.
Liters are usually utilized to measure the volume of liquids, this is because the density of liquids can vary a lot. However it can be applied to solids as well, for example 1 liter of Iron is around 7.7 kg. The symbol for litre is l or L. The script letter ℓ is also sometimes used.
For smaller volumes, the decilitre is used: 10 dl = one litre.
For smaller volumes, the centilitre is used: 100 cl = one litre.
For smaller volumes, the millilitre is used: 1000 ml = one litre.
The capital letter "L" is preferred by some people as the small "l" can look like the number one "1".
1 litre = 0.2200 imperial gallons
1 litre = 0.2642 US gallons
1 imperial gallon = 4.5461 litres
1 US gallon = 3.7854 litres
1 litre = 1 dm3
History
The metric system was first introduced in France in 1791. That system did not have its own unit of capacity or volume because volume can be measured in cubic metres. In 1793 work to make the metric system compulsory in France was started by the Temporary Commission of Republican Weights and Measures. Due to public demand, the commission said that the cubic metre was too big for everyday use. They said that a new unit based on the old cadil should be used instead. One cadil was to be 0.001 cubic metres. This was equivalent to a cube with sides 10 cm. The cadil was also known as the pinte or the litron. The pinte had been an old French unit of measure of capacity. In 1795 the definition was revised. The cadil was given the name litre.
In 1795 the kilogram was defined to be exactly one litre of water at 4 °C. In 1799 the kilogram was redefined. The new definition said that the kilogram was the mass of the kilogram des archives. In 1901 scientists measured the volume of one litre of water at 4 °C very carefully. They found that it occupied about dm3. The BIPM redefined the litre as being exactly the volume of one kilogram of water at 4 °C.
In 1960 the SI was introduced. The BIPM changed the definition of the litre back to "one dm3". The litre is not part of SI. The BIPM defined the litre as a "Non-SI unit accepted for use with the SI". This was because it is used in many countries. The BIPM said that the litre should not be used for very accurate work.
According to SI rules, the symbol for the litre should be "l". This is because the litre was not named after somebody whose name was "Litre". However the symbol "l" and the number "1" are easily confused. In 1979 the BIPM made an exception for the symbol for the litre. They said that people could use either "L" or "l" as its symbol.
In Europe, milk is sold in one litre cartons. One litre bottle is also a popular package for soft drinks. Most alcoholic drinks are sold as 1/3 litre (0.33 l), litre (0.5 l) or 3/4 litre (0.75 l) bottles.
Notes
References
Units of volume |
465 | https://simple.wikipedia.org/wiki/Lime | Lime | Lime is a green fruit, and the tree fruit itself. They are citrus fruits similar to lemons. Citrus fruits like limes are rich in vitamin C. Sailors from Britain were given lemon or lime juice to stop them falling ill with scurvy. This is how they got the nickname Limey. There are several citrus trees whose fruits are called limes. They include the key lime Citrus aurantiifolia, the Persian lime, the kaffir lime, and the desert lime Citrus glauca.
Limes are small, round and bright green. If they stay on the tree for a long time they turn yellow. Then they look like small round lemons.
Lime juice is used in cooking and in drinks. Lime oils are often used in perfumes, used for cleaning, and used for aromatherapy.
Lime tastes acidic and bitter. Lime juice is also made from limes.
Different kinds of limes
Persian lime – This lime is most often sold in supermarkets as lime.
Key lime – Smaller than the Persian lime, used to mix Cocktails and make pies.
Kaffir lime – Very small fruits, vegetable oil from the leaves is used for perfumes, leaves are used for cooking.
Other websites
http://aggie-horticulture.tamu.edu/citrus/limes.htm
Citrus |
467 | https://simple.wikipedia.org/wiki/Mathematics | Mathematics | Mathematics is the study of numbers, shapes, and patterns. The word comes from the Greek μάθημα (máthema), meaning "science, knowledge, or learning", and is sometimes shortened to math.
It is the study of:
Numbers: including how things can be counted.
Structure: including how things are organized, but also how they can be or could have been. This subfield is usually called algebra.
Place: where things are, and spatial arrangement, including arrangements of spaces themselves. This subfield is usually called geometry.
Change: how things become different. This subfield is usually called analysis.
Applied math is useful for solving problems in the real world. People working in business, science, engineering, and construction use mathematics.
Problem-solving in mathematics
Mathematics solves problems by using logic. One of the main tools of logic used by mathematicians is deduction. Deduction is a special way of thinking to discover and prove new truths using old truths. To a mathematician, the reason something is true (called a proof) is just as important as the fact that it is true, and this reason is often found using deduction. Using deduction is what makes mathematical thinking different from other kinds of scientific thinking, which might rely on experiments or on interviews.
Logic and reasoning are used by mathematicians to create general rules, which are an important part of mathematics. These rules leave out information that is not important so that a single rule can cover many situations. By finding general rules, mathematics solves many problems at the same time as these rules can be used on other problems. These rules can be called theorems (if they have been proven) or conjectures (if it is not known if they are true yet). Most mathematicians use non-logical and creative reasoning in order to find a logical proof.
Sometimes, mathematics finds and studies rules or ideas that we don't understand yet. Often in mathematics, ideas and rules are chosen because they are considered simple or neat. On the other hand, sometimes these ideas and rules are found in the real world after they are studied in mathematics; this has happened many times in the past. In general, studying the rules and ideas of mathematics can help us understand the world better. Some examples of math problems are addition, subtraction, multiplication, division, calculus, fractions and decimals. Algebra problems are solved by evaluating certain variables. A calculator answers every math problem in the four basic arithmetic operations.
Areas of study in mathematics
Number
Mathematics includes the study of numbers and quantities. It is a branch of science that deals with the logic of shape, quantity, and arrangement. Most of the areas listed below are studied in many different fields of mathematics, including set theory and mathematical logic. The study of number theory usually focuses more on the structure and behavior of the integers rather than on the actual foundations of numbers themselves, and so is not listed in this given subsection.
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| Natural numbers || Integers || Rational numbers || Real numbers || Complex numbers
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|| Ordinal numbers || Cardinal numbers || Arithmetic operations || Arithmetic relations || Functions, see also special functions
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Structure
Structural mathematics studies objects' and constructions' shape and integrity. These are areas of algebra and calculus.
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| Number theory || Abstract algebra || Linear algebra || Order theory || Graph theory
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Shape
Some areas of mathematics study the shapes of things. Most of these areas are part of the study of geometry.
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| Topology || Geometry || Trigonometry || Differential geometry || Fractal geometry
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Change
Some areas of mathematics study the way things change. Most of these areas are part of the study of analysis.
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| Calculus || Vector calculus || Analysis
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|| Differential equations || Dynamical systems || Chaos theory
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Applied mathematics
Applied math uses symbolic logic to solve problems in areas like engineering and physics.
Numerical analysis – Optimization – Probability theory – Statistics – Mathematical finance – Game theory – Mathematical physics – Fluid dynamics - Computational algorithms
Famous theorems
These theorems and conjectures have interested mathematicians and amateurs alike:
Pythagorean theorem – FLT – Goldbach's conjecture – Twin Prime Conjecture – Gödel's incompleteness theorems – Poincaré conjecture – Cantor's diagonal argument – Four color theorem – Zorn's lemma – Euler's Identity – Church-Turing thesis
These theorems and hypotheses have greatly changed mathematics:
Central limit theorem classification theorems of surfaces – Continuum hypothesis – Fourier Theorem – Fundamental theorem of calculus – Fundamental theorem of algebra – Fundamental theorem of arithmetic – Fundamental theorem of projective geometry – Gauss-Bonnet theorem - Kantorovich theorem – P Versus NP – Pythagorean theorem – Riemann hypothesis
These are a few conjectures that have been called "revolutionary":
Beal Conjecture (a generalization of FLT) – Birch and Swinnerton-Dyer Conjecture – Collatz Conjecture – Goldbach's Conjecture –Hodge Conjecture – Poincaré Conjecture
Foundations and methods
Set theory – Symbolic logic – Model theory – Category theory – Logic – Table of mathematical symbols
History and the world of mathematicians
History of mathematics – Timeline of mathematics – Mathematicians – Fields Medal – Abel Prize – Millennium Prize Problems (Clay Math Prize) – International Mathematical Union – Mathematics competitions – Lateral thinking – Mathematics and gender
Awards in mathematics
There is no Nobel Prize in mathematics. Mathematicians can receive the Abel Prize and the Fields Medal for important works.
The Clay Mathematics Institute has said it will give one million dollars to anyone who solves one of the Millennium Prize Problems.
Mathematical tools
There are many tools used to do math or find answers to math problems.
Older tools
Abacus
Napier's bones, Slide rule
Ruler and Compass
Mental calculation
Writing
Newer tools
Graphing calculators, scientific calculators and more complex computer visual tools
Programming languages
Computer algebra systems (listing) and automated matrix analysis
statistics software (for example SPSS)
SAS (programming language)
R (programming language)
References
Related pages
Timeline of women in mathematics
American Mathematical Society
Society for Industrial and Applied Mathematics
EASIAM
International Congress on Industrial and Applied Mathematics
International Congress of Mathematicians
International Mathematical Olympiad
Mathematics Genealogy Project
Mathematics Subject Classification
Other websites
Mathematics Citizendium
Mathematics |
468 | https://simple.wikipedia.org/wiki/March | March | March (Mar.) is the third month of the year in the Gregorian calendar, coming between February and April. It has 31 days. March is named after Mars, the Roman god of war.
March always begins on the same day of the week as November, and additionally, February in common years. March always ends on the same day of the week as June.
The Month
In ancient Rome, March was called Martius. It was named after the war god (Mars) and the Romans thought that it was a lucky time to begin a war. Before Julius Caesar's calendar reform, March was the first month of the year in the Roman calendar, as the winter was considered to be a monthless period. It is one of seven months to have 31 days.
March begins on the same day of the week as February in common years and November every year, as each other's first days are exactly 4 weeks (28 days) and 35 weeks (245 days) apart respectively. March ends on the same day of the week as June every year, as each other's last days are exactly 13 weeks (91 days) apart.
In common years, March starts on the same day of the week as June of the previous year, and in leap years, September and December of the previous year. In common years, March finishes on the same day of the week as September of the previous year, and in leap years, April and December of the previous year.
In years immediately before common years, March starts on the same day of the week as August of the following year, and in years immediately before leap years, May of the following year. In years immediately before common years, March finishes on the same day of the week as August and November of the following year, and in years immediately before leap years, May of the following year.
In leap years, the day before March 1 is February 29. This determines the position of each day of the year from there on. As an example, March 1 is usually the 60th day of the year, but in a leap year is the 61st day.
In terms of seasons, March is one of two months to have an equinox (the other is September, its seasonal equivalent in both hemispheres), with daylight and darkness of roughly the same number of hours, halfway between the December and June solstices. In the Northern Hemisphere, spring starts in this month, while it is autumn in the Southern Hemisphere.
Start of the season
The official start of either season is March 1, though the equinox can fall on March 20 or 21, occasionally on March 19. The northern spring equinox marks the start of the Iranian New Year and Baha'i New Year. It is from the March 21 date that Easter's date is calculated, on the Sunday after the first full moon in spring, meaning it can fall between March 22 and April 25 in Western Christianity.
Events in March
Fixed events
March 1 - Saint David's Day (Wales)
March 1 - March 1st Movement Memorial Day (South Korea)
March 1 - Beer Day (Iceland)
March 1 - Independence Day (Bosnia and Herzegovina)
March 2 - Independence Day (Morocco)
March 2 - Texas Independence Day
March 2 - jana day (Algeria)
March 2 - Peasants Day (Burma)
March 3 - Hinamatsuri, Girls' Day (Japan)
March 3 - Liberation Day (Bulgaria)
March 3 - Mother's Day (Georgia)
March 3 - Sportsmen's Day (Egypt)
March 3 - Martyrs' Day (Malawi)
March 4 - Saint Casimir's Day (Poland and Lithuania)
March 5 - Custom Chief's Day (Vanuatu)
March 5 - Lei Feng Day (China)
March 5 - National Tree Planting Day (Iran)
March 5 - Saint Piran's Day (Cornwall)
March 6 - Independence Day (Ghana)
March 6 - Alamo Day (Texas)
March 6 - Foundation Day (Norfolk Island)
March 7 - Felicity and Perpetua (Roman Catholicism)
March 7 - Teachers' Day (Albania)
March 8 - International Women's Day
March 9 - Teachers' Day (Lebanon)
March 10 - Tibetan Uprising Day (Supporters of Tibetan Independence)
March 11 - Re-establishment of Independence (Lithuania)
March 11 - Moshoeshoe Day (Lesotho)
March 11 - Johnny Appleseed Day (United States)
March 12 - National Day of Mauritius
March 12 - Youth Day (Zambia)
March 14 - Pi Day
March 14 - Mother Tongue Day (Estonia)
March 14 - White Day (Japan and Korea)
March 15 - The Ides of March, and the assassination of Julius Caesar.
March 15 - National Day of Hungary
March 15 - Holiday in Liberia, celebrating its first President, Joseph Jenkins Roberts
March 15 - Honen Matsuri (Japan)
March 16 - Saint Urho's Day (Finnish Communities in Canada and the US)
March 16 - Latvian Legion Day
March 16 - Day of the Book Smugglers (Lithuania)
March 17 - Saint Patrick's Day, celebrating Saint Patrick, the patron saint of Ireland
March 19 - Saint Joseph's Day (Roman Catholicism)
March 19 - Unity Day (Kashubia, northern Poland)
March 20/21 - Equinox, northern Spring, southern Autumn
March 20/21 - Iranian New Year
March 20 - Independence Day (Tunisia)
March 20 - Francophone Day
March 21 - Baha'i New Year
March 21 - Independence Day (Namibia)
March 21 - Benito Juarez' Birthday (Mexico)
March 21 - World Poetry Day
March 21 - Youth Day (Tunisia)
March 21 - Harmony Day (Australia)
March 21 - Human Rights Day (South Africa)
March 21 - World Down syndrome Day
March 22 - World Water Day
March 22 - Emancipation Day (Puerto Rico)
March 22 - Day of the People's Party (Laos)
March 23 - Republic Day (Pakistan)
March 23 - Polish-Hungarian Friendship Day
March 23 - Family Day (South Africa)
March 24 - World Tuberculosis Day
March 24 - Day of Remembrance for Truth and Justice (Argentina)
March 25 - Independence Day (Greece)
March 25 - Maryland Day
March 25 - Mother's Day (Slovenia)
March 25 - Annunciation of the Blessed Virgin Mary (Roman Catholicism), also known as Lady Day, old New Year in some European countries
March 26 - Independence Day (Bangladesh)
March 26 - Prince Kuhio Day (Hawaii)
March 26 - Prophet Zoroaster's Birthday (Zoroastrianism)
March 26 - Day of Democracy (Mali)
March 28 - Serfs Emancipation Day (Tibet)
March 28 - Teachers' Day (Czech Republic and Slovakia)
March 29 - Boganda Day (Central African Republic)
March 29 - Youth Day (Republic of China)
March 31 - Cesar Chavez Day (United States)
March 31 - Freedom Day (Malta)
Moveable events
On a Sunday between March 1 and April 4, Mother's Day is celebrated in the UK.
Lent and Easter-related observances in Western Christianity.
Shrove Monday - between February 2 and March 8
Shrove Tuesday (Pancake Day) - between February 3 and March 9
Ash Wednesday, start of Lent - between February 4 and March 10
Palm Sunday, start of Holy Week - between March 15 and April 18
Maundy Thursday - between March 19 and April 22
Good Friday - between March 20 and April 23
Easter occurs on a Sunday between March 22 and April 25 (note: In Eastern Christianity, Easter falls between April 4 and May 8).
Easter Monday - between March 23 and April 26
Jewish Passover coincides with Christian Holy Week, earliest run is March 15 to March 22, latest run is April 18 to April 25.
Commonwealth Day (second Monday in March)
Canberra Day (Second Monday in March)
Daylight Saving Time
Canada and the United States start Daylight Saving Time on the second Sunday in March. Clocks go forward one hour.
European Summer Time begins on the last Sunday in March. Clocks go forward one hour.
The Winter Paralympics are often held in this month.
Six Nations - rugby union tournament running from early February to mid-March, competing countries are England, France, Ireland, Italy, Scotland and Wales
Start of the Formula One motor racing season
Selection of historical events
March 1, 1872 - Yellowstone National Park becomes the world's first national park.
March 1, 1910 - An avalanche buries a train in northeastern King County, Washington.
March 1, 1919 - The March 1st Movement begins in Korea.
March 1, 1936 - The Hoover Dam is completed.
March 2, 1956 - Morocco declares its independence from France.
March 3, 1845 - Florida becomes the 27th State of the US.
March 3, 1925 - The Mount Rushmore monument is founded, starting work on carving four Presidents' faces into the mountain.
March 5, 1953 - Russian composer Sergei Prokofiev and Soviet leader Joseph Stalin die on the same day as each other.
March 6, 1788 - The first fleet of convicts arrives at Norfolk Island.
March 6, 1957 - Ghana becomes independent from the United Kingdom.
March 7, 1867 - Alexander Graham Bell is granted a patent for the telephone.
March 7, 1912 - Roald Amundsen announces that his Norwegian expedition successfully reached the South Pole on December 14 of the previous year.
March 8, 1911 - First celebration of International Women's Day.
March 8, 1918 - The first cases of the deadly Spanish flu virus are reported.
March 8, 2014 - Malaysia Airlines Flight 370 disappears.
March 9, 1908 - A five-man team climbs to the top of Mount Erebus in Antarctica.
March 9, 1959 - The first Barbie dolls are sold.
March 10, 1906 - A deadly mining disaster in Courrieres, France, kills 1,099 miners.
March 10, 1957 - Osama bin Laden is born.
March 10, 1977 - Astronomers discover rings around the planet Uranus.
March 11, 1985 - Mikhail Gorbachev becomes leader of the Soviet Union.
March 11, 1990 - Lithuania declares its independence from the Soviet Union.
March 11, 2004 - Terrorists bomb rush-hour trains in Madrid, killing 191 people.
March 11, 2011 - The 2011 Sendai earthquake and tsunami disaster kills many thousands of people in northeastern Japan, after a magnitude 9.1 earthquake, tsunamis, and a nuclear disaster at Fukushima.
March 12, 1913 - Canberra is officially named.
March 12, 1930 - Mahatma Gandhi begins his Salt March, as part of the movement for Indian independence.
March 12, 1968 - Mauritius becomes independent.
March 13, 1781 - William Herschel discovers the planet Uranus.
March 13, 1881 - Tsar Alexander II of Russia is murdered when a bomb is thrown at his carriage.
March 13, 2013 - Pope Francis is chosen as Pope. Coming from Argentina, he is the first Latin American Pope.
March 14, 1879 - Albert Einstein is born.
March 14, 1883 - Karl Marx dies at the age of 64 years.
March 14, 2018 - Stephen Hawking dies.
March 15, 44 BC - Julius Caesar is murdered on the Ides of March.
March 15, 1820 - At the easternmost tip of the US, Maine becomes the 23rd State.
March 15, 1848 - Revolution in Pest, Hungary.
March 15, 2019 - A terrorist shooting occurs in Christchurch, killing 49 Muslims.
March 17, 1861 - Italy becomes a Kingdom, making Italy a unified state.
March 17, 1959 - Tenzin Gyatso, 14th Dalai Lama flees to India.
March 17, 1992 - A referendum in South Africa supports the end of Apartheid.
March 18, 1965 - Aleksei Leonov performs the first spacewalk.
March 19, 1932 - Sydney Harbour Bridge is opened.
March 20, 526 - The 526 Antioch earthquake kills around 300,000 people in Syria and southeastern Turkey.
March 20, 1861 - Mendoza, Argentina is destroyed by an earthquake that kills 6,000 people.
March 20, 1956 - Tunisia becomes independent.
March 20, 1995 - The Aum Shinrikyo cult carries out a deadly sarin gas attack on the Tokyo subway.
March 20, 2003 - Iraq War starts.
March 21, 1844 - Start of the Baha'i calendar.
March 21, 1960 - Sharpeville massacre: Police open fire on demonstrators in South Africa, killing 69 people.
March 21, 1990 - Namibia becomes independent.
March 21, 2006 - Twitter is founded.
March 22, 1818 - Most recent occurrence of Easter on its earliest possible date.
March 22, 1957 - The Arab League is founded.
March 22, 1997 - Comet Hale-Bopp makes its closest approach to Earth.
March 23, 1956 - Pakistan becomes an Islamic Republic.
March 24, 1603 - Queen Elizabeth I of England dies aged 69, without children. James VI of Scotland becomes James I of England.
March 24, 1989 - The Exxon Valdez oil tanker runs aground at Prince William Sound in Alaska, causing a devastating oil spill.
March 25, 1655 - Christiaan Huygens discovers Saturn's moon Titan.
March 25, 1821 - Greece declares its independence from the Ottoman Empire.
March 25, 1957 - The European Economic Community is founded.
March 26, 1830 - The Book of Mormon is published in Palmyra, New York.
March 26, 1971 - Bangladesh's war of Independence starts.
March 26, 1997 - Members of the Heaven's Gate cult commit mass suicide.
March 27, 1964 - The Good Friday earthquake strikes south-central Alaska.
March 28, 1939 - Spanish Civil War: Francisco Franco conquers Madrid.
March 29, 1792 - King Gustav III of Sweden dies as a result of being shot at a masquerade ball.
March 30, 1867 - United States Secretary of State agrees to purchase Alaska from Russia for $7.2 million.
March 30, 1981 - John Hinckley shoots at Ronald Reagan in an attempt to kill him.
March 31, 1889 - The Eiffel Tower is opened to the public.
March 31, 1968 - US President Lyndon B. Johnson announces that he intends not to run for re-election.
March 31, 1995 - American singer Selena is shot and killed by her former manager and friend of her boutiques, Yolanda Saldivar.
Trivia
March's flower is the daffodil.
March's birthstones are the bloodstone and aquamarine. The meaning of the bloodstone is courage.
The star signs for March are Pisces (February 20 to March 20) and Aries (March 21 to April 20).
March is one of two months of the year that begin with an 'M' in the English language (May is the other). Both have an 'A' as their second letter, and they come on either side of April.
March 1 is the only day in March to start within the first sixth of the calendar year.
It is less common for Easter to occur in March than in April. Recent occurrences in March were in 2002 (March 31), 2005 (March 27), 2008 (March 23), 2013 (March 31) and 2016 (March 27).
March is named for Mars, the Roman god of war, and is called "mars" in some languages. This is also where the planet Mars gets its name from.
Other meanings
A march is also a type of music, originally written for and performed by marching bands.
March also refers to a certain way of walking.
March is also the name of a place in Germany.
There is an animal known as the March hare.
03 |
469 | https://simple.wikipedia.org/wiki/May | May | May is the fifth month of the year in the Julian and Gregorian calendars, coming between April and June. It has 31 days. The month of May might have been named for the Roman goddess Maia, or more likely the Roman goddess of fertility Bona Dea, whose festival was held in May.
May never begins or ends on the same day of the week as any other month.
May's flower is the Lily of the Valley. Its birthstone is the emerald. The meaning of the emerald is success in love.
The Month
May comes between April and June and is the fifth month of the year in the Gregorian calendar. It is one of the seven months to have 31 days. In the older Roman calendar, May was the third month of the year. It is a spring month in the Northern Hemisphere and an autumn month in the Southern Hemisphere. In each hemisphere, it is the seasonal equivalent of November in the other. May is likely to have been named after the Roman goddess Maia, though there is a theory that May might have its name from the Latin "Maiores", meaning "Seniors". The same theory suggests that June would then be named from "Iuniores", meaning "Juniors".
No other month of any year either begins or ends on the same day of the week as May; this month is the only one that has both of these properties.
In common years, May starts on the same day of the week as August of the previous year, and in leap years, March and November of the previous year. In common years, May finishes on the same day of the week as August and November of the previous year, and in leap years, March and June of the previous year. In leap years and years immediately after that, May starts on the same day of the week as February of the previous year.
Every year, May both starts and finishes on the same day of the week as January of the following year, as each other's first and last days are exactly 35 weeks (245 days) apart. In years immediately before common years, May starts on the same day of the week as October of the following year, and in years immediately before leap years, April and July of the following year. In years immediately before common years, May finishes on the same day of the week as February and October of the following year, and in years immediately before leap years, July of the following year.
In the Northern Hemisphere, May is in late Spring, and May Day on May 1 and Walpurgis Night, during the night of April 30 to May 1, are symbolic of the transition from winter to summer. In the Southern Hemisphere, it is in autumn, and comes just before the Antarctic winter, when emperor penguins breed there.
Events in May
Special devotions to the Virgin Mary take place in May.
Fixed Events
May 1 - May Day in many countries.
May 1 - International Workers' Day
May 1 - Beltane (neo-Pagan culture)
May 1 - Lei Day (Hawaii)
May 1 - Constitution Day in Latvia and the Marshall Islands
May 2 - Flag Day (Poland)
May 2 - National Education Day (Indonesia)
May 2 - Teachers' Day in Iran and Bhutan
May 3 - Constitution Day (Poland, Lithuania)
May 3 - Constitution Memorial Day (Japan)
May 3 - World Press Freedom Day
May 4 - Unofficial Star Wars Day
May 4 - International Firefighters' Day
May 4 - Youth Day in China and Fiji
May 4 - Greenery Day (Japan)
May 4 - Remembrance of the Dead (Netherlands)
May 5 - Children's Day in Japan and South Korea
May 5 - Cinco de Mayo (Mexico and United States)
May 5 - Liberation Day in the Netherlands and Denmark
May 5 - Coronation Day (Thailand)
May 5 - Europe Day
May 6 - International No Diet Day
May 6 - Teacher's Day (Jamaica)
May 6 - Saint George's Day (Eastern Orthodox countries)
May 7 - Radio Day in Russia and Bulgaria
May 8 - Victory in Europe Day, marking end of World War II in Europe
May 8 - International Red Cross and Red Crescent Day
May 8 - Parents' Day (South Korea)
May 8 - Harry S. Truman Day (Missouri)
May 8 - Miguel Hidalgo's Birthday (Mexico)
May 9 - Victory and Peace Day (Armenia)
May 9 - Victory Day (former Soviet Union countries), marking end of World War II in Europe
May 9 - Independence Day (Romania)
May 10 - Confederate Memorial Day (North Carolina and South Carolina)
May 10 - Constitution Day (Federated States of Micronesia)
May 10 - Mother's Day (Mexico, Guatemala, El Salvador)
May 11 - National Technology Day (India)
May 11 - Statehood Day (Minnesota)
May 12 - International Nurses Day, birthday of Florence Nightingale
May 12 - Johan Vilhelm Snellman Day (Finland)
May 16 - National Day (South Sudan)
May 16 - Teachers' Day (Malaysia)
May 17 - Constitution Day, National Day of Norway
May 17 - Constitution Day (Nauru)
May 17 - Liberation Day (Democratic Republic of the Congo)
May 17 - International Day Against Homophobia and Transphobia
May 17 - Navy Day (Argentina)
May 17 - National Famine Memorial Day (Ireland)
May 17 - Galician Literature Day
May 18 - International Museum Day
May 18 - Independence Day (Somaliland)
May 18 - Battle of Las Piedras Day (Uruguay)
May 19 - Youth and Sports Day (Turkey)
May 19 - Genocide Memorial Day (Greece)
May 19 - Ho Chi Minh's Birthday (Vietnam)
May 19 - Malcolm X Day (United States)
May 20 - Independence Day (Cuba)
May 20 - Independence Day (East Timor)
May 21 - Navy Day (Chile)
May 21 - Independence Day (Montenegro)
May 21 - Saint Helena Day
May 21 - Day of Patriots and the Military (Hungary)
May 22 - Republic Day (Sri Lanka)
May 22 - Unity Day (Yemen)
May 22 - National Sovereignty Day (Haiti)
May 22 - International Day of Biological Diversity
May 22 - Harvey Milk Day (California)
May 23 - Birthday of Guru Amar Das (Sikhism)
May 23 - Declaration of the Bab (Baha'i faith)
May 23 - Labour Day (Jamaica)
May 23 - Students' Day (Mexico)
May 23 - World Turtle Day
May 24 - Battle of Pichincha Day (Ecuador)
May 24 - Bermuda Day
May 24 - Commonwealth Day (Belize)
May 24 - Independence Day (Eritrea)
May 24 - Aldersgate Day (Methodism)
May 24 - National Patriots Day (Quebec)
May 25 - Africa Day
May 25 - Geek Pride Day
May 25 - Independence Day (Jordan)
May 25 - Liberation Day (Lebanon)
May 25 - National Day (Argentina)
May 26 - Independence Day (Georgia)
May 26 - Independence Day (Guyana)
May 26 - Crown Prince's Birthday (Denmark)
May 26 - Mother's Day (Poland)
May 26 - National Sorry Day (Australia)
May 28 - Independence Day (Armenia)
May 28 - Independence Day (Azerbaijan)
May 28 - Republic Day (Nepal)
May 28 - Flag Day (Philippines)
May 28 - Armed Forces Day (Croatia)
May 30 - Anguilla Day
May 30 - Canary Islands Day
May 31 - Anti-Tobacco Day
Moveable and Monthlong Events
In the United Kingdom, May Day is May 1, but a public holiday is held on the first Monday in May.
In the United States, Canada and Australia, Mother's Day is the second Sunday in May.
In the United States, Memorial Day, a public holiday, is on May 30, but is observed on the last Monday in May.
Spring Bank Holiday in the United Kingdom, last Monday in May
Eastern Orthodox Easter, between April 4 and May 8
Ascension Day (Western Christianity), between April 30 and June 3
Pentecost, between May 10 and June 13 in Western Christianity and between May 23 and June 26 in Eastern Orthodox Christianity
Corpus Christi (Western Christianity) between May 21 and June 24
Victoria Day (Canada), Monday on or before May 24
Giro d'Italia (Cycling)
World Snooker Championship, late April, early May
Monaco Grand Prix, traditionally the most important race of the Formula One season
French Open (Tennis), late May, early June
The Eurovision Song Contest is generally held in May
Marathon races:
Belfast, Northern Ireland, UK
Cleveland, Ohio, US
Copenhagen, Denmark
Edinburgh, Scotland, UK
Ottawa, Canada
Pittsburgh, Pennsylvania, US
Prague, Czech Republic
Vancouver, British Columbia, Canada
References
Selection of Historical Events
May 1, 1851 - Start of the Great Exhibition in London
May 1, 1931 - The Empire State Building in New York City is officially opened.
May 1, 1994 - Racing driver Ayrton Senna is killed in a crash at the San Marino Grand Prix
May 1, 2004 - Ten countries join the European Union.
May 2, 1519 - Leonardo da Vinci dies.
May 2, 1611 - The King James Bible is published.
May 2, 1945 - Troops of the Soviet Union capture Berlin in the end-phase of World War II.
May 2, 1997 - Tony Blair becomes Prime Minister of the United Kingdom.
May 2, 2011 - Osama bin Laden is killed.
May 3, 1791 - Poland's first Constitution is introduced.
May 3, 1947 - Japan's first post-World War II Constitution enters effect.
May 3, 2008 - Cyclone Nargis kills tens of thousands of people in Burma.
May 4, 1493 - Pope Alexander VI divides the "New World" between Spain and Portugal.
May 4, 1979 - Margaret Thatcher becomes Prime Minister of the United Kingdom.
May 4, 1990 - Latvia declares independence from the Soviet Union.
May 5, 1821 - Napoleon Bonaparte dies on the remote South Atlantic island of Saint Helena.
May 5, 1945 - World War II: Denmark and the Netherlands are liberated.
May 6, 1910 - George V of the United Kingdom becomes King.
May 6, 1937 - The airship LZ 129 Hindenburg catches fire on landing in New Jersey, killing 36 people.
May 7, 1915 - A German U-boat sinks the RMS Lusitania, killing 1,198 people.
May 8, 1902 - Mount Pelee on Martinique erupts, killing 30,000 people.
May 8, 1945 - World War II: Final surrender by Germany, ending the war in Europe.
May 9, 1901 - The first Australian parliament meets in Melbourne. It is later moved to Canberra on this day in 1927.
May 9, 1945 - World War II: The Channel Islands are liberated.
May 10, 1877 - Romania declares independence from Turkey.
May 10, 1940 - Winston Churchill becomes Prime Minister of the United Kingdom on the same day that Germany invades the Netherlands, Belgium and Luxembourg.
May 10, 1994 - Nelson Mandela becomes President of South Africa.
May 11, 1812 - Spencer Perceval becomes the only Prime Minister of the United Kingdom to be assassinated.
May 11, 1949 - Siam changes its name to Thailand.
May 12, 1926 - The Italian airship Norge flies over the North Pole.
May 12, 2008 - A major earthquake strikes Sichuan province, China, killing tens of thousands of people.
May 13, 1830 - Ecuador gains independence.
May 13, 1981 - An assassination attempt is made on Pope John Paul II in Vatican City.
May 14, 1811 - Paraguay gains independence.
May 14, 1948 - The State of Israel is founded.
May 15, 1701 - The War of the Spanish Succession begins.
May 16, 1929 - The first Academy Awards are given out.
May 16, 1975 - Sikkim unites with India.
May 16, 2009 - Alexander Rybak of Norway wins the Eurovision Song Contest with a record points total.
May 17, 1814 - Norway's Constitution is agreed on.
May 18, 1980 - Mount Saint Helens erupts in Washington State, killing 57 people, and changing the surrounding landscape completely.
May 18, 1991 - Somaliland declares independence, though this is not recognized internationally.
May 19, 1536 - Anne Boleyn, second wife of Henry VIII of England, is executed.
May 19, 1991 - Voters in Croatia choose to become independent from Yugoslavia.
May 20, 1883 - Krakatoa starts a series of eruptions that would end violently in August.
May 20, 1902 - Cuba becomes independent from the United States.
May 20, 2002 - East Timor becomes independent from Indonesia.
May 21, 1927 - Charles Lindbergh flies across the Atlantic Ocean, landing in Paris.
May 21, 1932 - Amelia Earhart becomes the first woman to fly across the Atlantic Ocean.
May 21, 1991 - Former Prime Minister of India is assassinated.
May 21, 2006 - Voters in Montenegro choose, by a majority, to separate from Serbia and become independent.
May 22, 1960 - Great Chilean Earthquake
May 22, 1972 - Ceylon changes its name to Sri Lanka and becomes a Republic.
May 22, 1980 - The Pac-man game is released.
May 22, 1990 - Yemen unites.
May 23, 1568 - The Netherlands declare independence from Spain.
May 23, 1949 - The Federal Republic of Germany is founded.
May 24, 1832 - The first Kingdom of Greece is declared.
May 24, 1956 - The first Eurovision Song Contest takes place in Lugano, Switzerland.
May 24, 1993 - Eritrea becomes independent from Ethiopia.
May 25, 1810 - Argentine War of Independence starts.
May 25, 1963 - The African Union is founded.
May 26, 1918 - Georgia declares independence from Russia.
May 26, 1966 - Guyana becomes independent from the United Kingdom.
May 27, 1937 - The Golden Gate Bridge in San Francisco opens to people crossing it on foot, opening to vehicle traffic the next day.
May 28, 1918 - Armenia and Azerbaijan both declare independence on the same day as each other.
May 28, 2008 - Nepal becomes a Republic.
May 29, 1660 - Charles II of England, Scotland and Ireland becomes King, restoring the monarchy there.
May 29, 1953 - Edmund Hillary and Tenzing Norgay become the first people known to have reached the top of Mount Everest, from the Nepalese side.
May 31, 1910 - The Union of South Africa is formed.
May 31, 1911 - The RMS Titanic is launched in Belfast.
May 31, 1970 - A major earthquake strikes Peru, causing several avalanches, the deadliest of which buries the town of Yungay.
Trivia
The floral symbol of May is the Rosa chinensis.
May is the only month that never begins (June is the other) or ends (September is the other) on the same day of the week as any other months within any calendar year.
Along with March, May is one of two months in the English language that start with 'M' and have an 'A' as their second letter. They surround the month of April.
In the English language, May has the shortest name of all the months of the year.
The astrological signs for May are Taurus (April 21 to May 20) and Gemini (May 21 to June 20): Additionally, in the English language, May is the only month of the year whose two astrological signs don't share any letters in common.
May is the second of three months in a row, in the English language, that can also be a female given name, along with April and June.
May 1 is the only day in May to be entirely within the first third of the calendar year.
"May" backwards is "Yam", the name of a vegetable.
Two 20th century US Presidents were born in May - Harry S. Truman (May 8) and John F. Kennedy (May 29).
No President of the United States, to-date, has died in May, though James Buchanan narrowly avoided doing so, dying on the morning of June 1, 1868.
05 |
472 | https://simple.wikipedia.org/wiki/Music | Music | Music is a form of art that uses sound organised in time. Music is also a form of entertainment that puts sounds together in a way that people like, find interesting or dance to. Most music includes people singing with their voices or playing musical instruments, such as the piano, guitar, drums or bass.
The word music comes from the Greek word (mousike), which means "(art) of the Muses". In Ancient Greece the Muses included the goddesses of music, poetry, art, and dance. Someone who makes music is known as a musician.
Definition of music
Music is sound that has been organized by using rhythm, melody or harmony. If someone bangs saucepans while cooking, it makes noise. If a person bangs saucepans or pots in a rhythmic way, they are making a simple type of music.
There are four things which music has most of the time:
Music often has pitch. This means high and low notes. Tunes are made of notes that go up or down or stay on the same pitch.
Music often has rhythm. Rhythm is the way the musical sounds and silences are put together in a sequence. Every tune has a rhythm that can be tapped. Music usually has a regular beat.
Music often has dynamics. This means whether it is quiet or loud or somewhere in between.
Music often has timbre. This is a French word (pronounced: "TAM-br"). The "timbre" of a sound is the way that a sound is interesting. The sort of sound might be harsh, gentle, dry, warm, or something else. Timbre is what makes a clarinet sound different from an oboe, and what makes one person's voice sound different from another person.
Definitions
There is no simple definition of music which covers all cases. It is an art form, and opinions come into play. Music is whatever people think is music. A different approach is to list the qualities music must have, such as, sound which has rhythm, melody, pitch, timbre, etc.
These and other attempts, do not capture all aspects of music, or leave out examples which definitely are music. Music is a special shared relationship between a person, the persons behavior, and a sounding object.p10 Musical experience and the music, together, are called phenomena, and the activity of describing phenomena is called phenomenology.
History
Even in the stone age people made music. The first music was probably made trying to imitate sounds and rhythms that occurred naturally. Human music may echo these phenomena using patterns, repetition and tonality. This kind of music is still here today. Shamans sometimes imitate sounds that are heard in nature. It may also serve as entertainment (games), or have practical uses, like attracting animals when hunting.
Some animals also can use music. Songbirds use song to protect their territory, or to attract a mate. Monkeys have been seen beating hollow logs. This may, of course, also serve to defend the territory.
The first musical instrument used by humans was probably the voice. The human voice can make many different kinds of sounds. The larynx (voice box) is like a wind instrument.
The oldest known Neanderthal hyoid bone with the modern human form was found in 1983, indicating that the Neanderthals had language, because the hyoid supports the voice box in the human throat.
Most likely the first rhythm instruments or percussion instruments involved the clapping of hands, stones hit together, or other things that are useful to keep a beat. There are finds of this type that date back to the paleolithic. Some of these are ambiguous, as they can be used either as a tool or a musical instrument.
The first flutes
The oldest flute ever discovered may be the Divje Babe flute, found in the Slovenian cave Divje Babe I in 1995. It is not certain that it is really a flute. The item in question is a piece of the femur of a young cave bear, and is about 43,000 years old. However, whether it is a musical instrument or just a bone that got chewed on is an ongoing debate.
In 2008, archaeologists discovered a bone flute in the Hohle Fels cave near Ulm, Germany. The five-holed flute has a V-shaped mouthpiece and is made from a vulture wing bone. The discovery is the oldest confirmed find of any musical instrument in history. Other flutes were also found in the cave. This flute was found next to the Venus of Hohle Fels and a short distance from the oldest known human carving. When they announced their discovery in 2009, the scientists suggested that the find showed that there was a well-established musical tradition when humans colonized Europe.
The oldest known wooden pipes were discovered near Greystones, Ireland, in 2004. A wood-lined pit contained a group of six flutes made from yew wood, between 30 and 50 cm long, tapered at one end, but without any finger holes. They may once have been strapped together.
In 1986 several bone flutes were found in Jiahu in Henan Province, China. They date to about 6,000 BC. They have between 5 and 8 holes each and were made from the hollow bones of a bird, the Red-crowned Crane. At the time of the discovery, one was still playable. The bone flute plays both the five- or seven-note scale of Xia Zhi and six-note scale of Qing Shang of the ancient Chinese musical system.
Ancient times
It is not known what the earliest human music was like. Some architecture and paintings are thousands of years old, but old music could not survive until people learned to write it down. The only way we can guess about early music is by looking at very old paintings that show people playing musical instruments, or by finding instruments in archaeological digs (digging underground to find old things). The earliest piece of music that was ever written down and that has not been lost was discovered on a tablet written in Hurrian, a language spoken in and around northern Mesopotamia (where Iraq is today), from about 1500 BC.
Middle Ages
Another surviving piece of early written music was a round called Sumer Is Icumen In. It was written down by a monk around the year 1250. Much of the music in the Middle Ages (roughly 450-1420) was folk music played by working people who wanted to sing or dance. When people played instruments, they were usually playing for dancers. However, most of the music that was written down was for the Catholic church. This music was written for monks to sing in church. It is called Chant (or Gregorian chant).
Renaissance
In the Renaissance (roughly 1400–1550) there was a lot of music, and many composers wrote music that has survived so that it can be performed, played or sung today. Many new types of art and music was made during this time.
Some music was written for use in church services (sacred music) by the Italian composer Giovanni da Palestrina (1525–1594). In Palestrina's music, many singers sing together (this is called a choir). There was also plenty of music not written for the church, such as happy dance music and romantic love songs. Popular instruments during the Renaissance included the viols (a string instrument played with a bow), lutes (a plucked stringed instrument that is a little like a guitar), and the virginal, a small, quiet keyboard instrument.
Baroque
The Baroque (roughly 1600–1740) was a Western cultural era. It emphasised drama and splendor in sculpture, painting, literature, dance, and music. In music, the term 'Baroque' applies to the final period of dominance of imitative counterpoint, where different voices and instruments echo each other but at different pitches, sometimes inverting the echo, and even reversing thematic material.
The popularity and success of the Baroque style was encouraged by the Roman Catholic Church which had decided at the time of the Council of Trent that the arts should communicate religious themes in direct and emotional involvement. The upper class also saw the dramatic style of Baroque architecture and art as a means of impressing visitors and expressing triumphant power and control. Baroque palaces are built around an entrance of courts, grand staircases and reception rooms of sequentially increasing opulence. In similar profusions of detail, art, music, architecture, and literature inspired each other in the Baroque cultural movement as artists explored what they could create from repeated and varied patterns. Some traits and aspects of Baroque paintings that differentiate this style from others are the abundant amount of details, often bright polychromy, less realistic faces of subjects, and an overall sense of awe, which was one of the goals in Baroque art.
The word baroque probably derives from the ancient Portuguese noun "barroco" which is a pearl that is not round but of unpredictable and elaborate shape. Hence, in informal usage, the word baroque can simply mean that something is "elaborate", with many details, without reference to the Baroque styles of the seventeenth and eighteenth centuries.
Classical period
In western music, the classical period means music from about 1750 to 1825. It was the time of composers like Joseph Haydn, Wolfgang Amadeus Mozart and Ludwig van Beethoven. Orchestras became bigger, and composers often wrote longer pieces of music called symphonies that had several sections (called movements). Some movements of a symphony were loud and fast; other movements were quiet and sad. The form of a piece of music was very important at this time. Music had to have a nice 'shape'. They often used a structure which was called sonata form.
Another important type of music was the string quartet, which is a piece of music written for two violins, a viola, and a violoncello. Like symphonies, string quartet music had several sections. Haydn, Mozart and Beethoven each wrote many famous string quartets.
The piano was invented during this time. Composers liked the piano, because it could be used to play dynamics (getting louder or getting softer). Other popular instruments included the violin, the violoncello, the flute, the clarinet, and the oboe.
Romantic period
The 19th century is called the Romantic period. Composers were particularly interested in conveying their emotions through music. An important instrument from the Romantic period was the piano. Some composers, such as Frederic Chopin wrote subdued, expressive, quietly emotional piano pieces. Often music described a feeling or told a story using sounds. Other composers, such as Franz Schubert wrote songs for a singer and a piano player called Lied (the German word for "song"). These Lieder (plural of Lied) told stories by using the lyrics (words) of the song and by the imaginative piano accompaniments. Other composers, like Richard Strauss, and Franz Liszt created narratives and told stories using only music, which is called a tone poem. Composers, such as Franz Liszt and Johannes Brahms used the piano to play loud, dramatic, strongly emotional music.
Many composers began writing music for bigger orchestras, with as many as 100 instruments. It was the period of "Nationalism" (the feeling of being proud of one's country) when many composers made music using folksong or melodies from their country. Lots of famous composers lived at this time such as Franz Schubert, Felix Mendelssohn, Frederic Chopin, Johannes Brahms, Pyotr Tchaikovsky and Richard Wagner.
Modern times
From about 1900 onwards is called the "modern period". Many 20th century composers wanted to compose music that sounded different from the Classical and Romantic music. Modern composers searched for new ideas, such as using new instruments, different forms, different sounds, or different harmonies.
The composer Arnold Schoenberg (1874–1951) wrote pieces which were atonal (meaning that they did not sound as if they were in any clear musical key). Later, Schoenberg invented a new system for writing music called twelve-tone system. Music written with the twelve-tone system sounds strange to some, but is mathematical in nature, often making sense only after careful study. Pure twelve-tone music was popular among academics in the fifties and sixties, but some composers such as Benjamin Britten use it today, when it is necessary to get a certain feel.
One of the most important 20th-century composers, Igor Stravinsky (1882–1971), wrote music with very complicated (difficult) chords (groups of notes that are played together) and rhythms. Some composers thought music was getting too complicated and so they wrote Minimalist pieces which use very simple ideas. In the 1950s and 1960s, composers such as Karlheinz Stockhausen experimented with electronic music, using electronic circuits, amplifiers and loudspeakers. In the 1970s, composers began using electronic synthesizers and musical instruments from rock and roll music, such as the electric guitar. They used these new instruments to make new sounds.
Composers writing in the 1990s and the 2000s, such as John Adams (born 1947) and James MacMillan (born 1959) often use a mixture of all these ideas, but they like to write tonal music with easy tunes as well.
Electronic music
Music can be produced electronically. This is most commonly done by computers, keyboards, electric guitars and disk tables. They can mimic traditional instruments, and also produce very different sounds. 21st-century electronic music is commonly made with computer programs and hardware mixers.
Jazz
Jazz is a type of music that was invented around 1900 in New Orleans in the south of the USA. There were many black musicians living there who played a style of music called blues music. Blues music was influenced by African music (because the black people in the United States had come to the United States as slaves. They were taken from Africa by force). Blues music was a music that was played by singing, using the harmonica, or the acoustic guitar. Many blues songs had sad lyrics about sad emotions (feelings) or sad experiences, such as losing a job, a family member dying, or having to go to jail (prison).
Jazz music mixed together blues music with European music. Some black composers such as Scott Joplin were writing music called ragtime, which had a very different rhythm from standard European music, but used notes that were similar to some European music. Ragtime was a big influence on early jazz, called Dixieland jazz. Jazz musicians used instruments such as the trumpet, saxophone, and clarinet were used for the tunes (melodies), drums for percussion and plucked double bass, piano, banjo and guitar for the background rhythm (rhythmic section). Jazz is usually improvised: the players make up (invent) the music as they play. Even though jazz musicians are making up the music, jazz music still has rules; the musicians play a series of chords (groups of notes) in order.
Jazz music has a swinging rhythm. The word "swing" is hard to explain. For a rhythm to be a "swinging rhythm" it has to feel natural and relaxed. Swing rhythm is not even like a march. There is a long-short feel instead of a same-same feel. A "swinging rhythm" also gets the people who are listening excited, because they like the sound of it. Some people say that a "swinging rhythm" happens when all the jazz musicians start to feel the same pulse and energy from the song. If a jazz band plays very well together, people will say "that is a swinging jazz band" or "that band really swings well."
Jazz influenced other types of music like the Western art music from the 1920s and 1930s. Art music composers such as George Gershwin wrote music that was influenced by jazz. Jazz music influenced pop music songs. In the 1930s and 1940s, many pop music songs began using chords or melodies from jazz songs. One of the best known jazz musicians was Louis Armstrong (1900–1971).
Pop music
"Pop" music is a type of popular music that many people like to listen to. The term "pop music" can be used for all kinds of music that was written to be popular. The word "pop music" was used from about 1880 onwards, when a type of music called music was popular.
Modern pop music grew out of 1950's rock and roll, (for example Chuck Berry, Bo Diddley and Little Richard) and rockabilly (for example Elvis Presley and Buddy Holly). In the 1960s, The Beatles became a famous pop music group. In the 1970s, other styles of music were mixed with pop music, such as funk and soul music. Pop music generally has a heavy (strong) beat, so that it is good for dancing. Pop singers normally sing with microphones that are plugged into an amplifier and a loudspeaker.
Musical notation
"Musical notation" is the way music is written down. Music needs to be written down in order to be saved and remembered for future performances. In this way composers (people who write music) can tell others how to play the musical piece as it was meant to be played.
Solfège
Solfège (sometimes called solfa) is the way tones are named. It was made in order to give a name to the several tones and pitches. For example, the eight basic notes "Do, Re, Mi, Fa, So, La, Ti, Do" are just the names of the eight notes that confirm the major scale.
Written music
Music can be written in several ways. When it is written on a staff (like in the example shown), the pitches (tones) and their duration are represented by symbols called notes. Notes are put on the lines and in the spaces between the lines. Each position says which tone must be played. The higher the note is on the staff, the higher the pitch of the tone. The lower the notes are, the lower the pitch. The duration of the notes (how long they are played for) is shown by making the note "heads" black or white, and by giving them stems and flags.
Music can also be written with letters, naming them as in the solfa "Do, Re, Mi, Fa, So, La, Ti, Do" or representing them by letters. The next table shows how each note of the solfa is represented in the Standard Notation:
The Standard Notation was made to simplify the lecture of music notes, although it is mostly used to represent chords and the names of the music scales.
These ways to represent music ease the way a person reads music. There are more ways to write and represent music, but they are less known and may be more complicated.
How to enjoy music
By listening
People can enjoy music by listening to it. They can go to concerts to hear musicians perform. Classical music is usually performed in concert halls, but sometimes huge festivals are organized in which it is performed outside, in a field or stadium, like pop festivals. People can listen to music on CD's, Computers, iPods, television, the radio, cassette/record-players and even mobile phones.
There is so much music today, in elevators, shopping malls, and stores, that it often becomes a background sound that we do not really hear.
By playing or singing
People can learn to play an instrument. Probably the most common for complete beginners is the piano or keyboard, the guitar, or the recorder (which is certainly the cheapest to buy). After they have learnt to play scales, play simple tunes and read the simplest musical notation, then they can think about which instrument for further development. They should choose an instrument that is practical for their size. For example, a very short child cannot play a full size double bass, because the double bass is over five feet high. People should choose an instrument that they enjoy playing, because playing regularly is the only way to get better. Finally, it helps to have a good teacher.
By composing
Anyone can make up their own pieces of music. It is not difficult to compose simple songs or melodies (tunes). It's easier for people who can play an instrument themselves. All it takes is experimenting with the sounds that an instrument makes. Someone can make up a piece that tells a story, or just find a nice tune and think about ways it can be changed each time it is repeated. The instrument might be someone's own voice.
The fact is, there are tons of instruments in the world.
Related pages
Classical music
Jazz music
Cuban music
Musical instrument
Orchestra
Pop music
Traditional pop
Scale (music)
References
Books
The Oxfords Companion to Music, ed. Percy Scholes, London 1970
The New Groves Dictionary of Music and Musicians, ed. Stanley Sadie, London 1980
Other websites
The Rock and Roll Hall of Fame and Museum
The Rock and Roll Hall of Fame
Music City the free music encyclopedia
Basic English 850 words
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Non-verbal communication |
473 | https://simple.wikipedia.org/wiki/Madrid | Madrid | Madrid (pronounced: “mah-drid or /məˈdrɪd/) is the capital and largest city of Spain. Madrid is in the middle of Spain, in the Community of Madrid. The Community is a large area that includes the city as well as small towns and villages outside the city. 7 million people live in the Community. More than 3 million live in the city itself. It is the largest city of Spain and, at 655 m (2,100 ft) above sea level, the second highest capital in Europe (after the Andorran capital Andorra la Vella). It is the second largest city in the European Union. As it is the capital city, Madrid is where the monarch lives and also where the government meets. Madrid is the financial centre of Spain. Many large businesses have their main offices there. It has four important footballs teams, Real Madrid, Atlético Madrid, Getafe, and Rayo Vallecano. People who live in Madrid are called madrileños.
Madrid was ruled by the Romans from the 2nd century. After AD 711 it was occupied by the Moors. In 1083 Spain was ruled again by Spaniards. Catholic kings ruled the country. By the mid-16th century it had become the capital of a very large empire. Spain was ruled by monarchs from the House of Habsburg, then the House of Bourbon. After the Spanish Civil War it was ruled by a dictator until the mid-1970s when it became a democracy.
Although it is a modern city, a lot of its history can be seen and felt as one walks along the streets and in the large squares of the city. There are beautiful parks, famous buildings, art galleries and concert halls.
History
During the history of Spain many different people have lived there. The Phoenicians came in 1100 BC, followed by Carthaginians, Romans, Vandals, Visigoths and Moors. It was not until 1492, when the Catholic Monarchs got power, that Spain became a united country. Jews and Moors, who had lived happily there for many years, were driven away. Spain became very rich because it conquered many overseas countries, especially in Central and South America. However, Spain fought many wars and lost much of its treasure. It was very poor in 1936 when the Civil War was fought. General Franco became a harsh dictator until 1975 when Juan Carlos I was brought back to Spain and made king. There is now a democratic government.
In prehistoric times people lived in the area which is now Madrid. The Romans lived there for several centuries. The origin of today’s city really starts in the 9th century when Muhammad I had a small palace built where the Palacio Real stands today. The Moors built strong forts in Madrid in 865 and put a wall round the city. These walls stood until 1476 when they were knocked down. In 1561 Felipe I moved the royal court from Toledo to Madrid. Madrid had now become the capital of a very large empire. Over the next years and decades the Plaza Mayor was built and many great buildings and monuments, many of which still stand.
When Ferdinand II of Aragon and Queen Isabella of Castile came to Madrid, Spain had become a very rich country. The 16th and 17th centuries are now known as the “Golden Century”. Their grandson was the famous Charles I of Spain (also known as Charles V, Holy Roman Emperor). He liked his court to be in Seville. His son, Philip II (1527–1598) moved the court to Madrid in 1561.
In the late 1800s there was a revolt, known as the First Spanish Republic. Later the monarchy was restored, but then there was a Second Spanish Republic followed by the Spanish Civil War. The Second Spanish Republic started on 14 April 1931 and was celebrated in La puerta del Sol which is the center of the city. Madrid suffered a lot in this war. It was bombed by airplanes.
During the dictatorship of Francisco Franco, especially during the 1960s, south Madrid became very industrialized, and many people from the rural areas moved to Madrid especially to the south east of the city.
When General Franco died and democracy was restored, Madrid became more prosperous. During the 1980s and 1990s many new buildings were put up.
Madrid has been attacked many times by terrorists. This includes the bombing of a restaurant in 1985, killing 18 people and the of trains in 2004, killing over 190 people.
Geography
Madrid has a borderline cold semi-arid climate (BSk in the Köppen climate classification) and a hot-summer Mediterranean climate (Csa in the Köppen climate classification). Most rain falls in autumn and spring. The winters are cool because it is high up, and occasionally it snows. The summers are hot and dry. Often the temperature is above 30 °C (86 °F) in July and August and can often reach 40 °C (104 °F). At night it is much cooler. This is why many offices and businesses are closed and people have a sleep (siesta) in the afternoon when it is hot. Then they come out again in late afternoon and often eat dinner late at night.
Buildings in Madrid
Spain's Royal Palace is in Madrid. It is one of the largest palaces in all of Western Europe. But the king and his family do not live there anymore; they live in a smaller palace, and only use the Royal Palace for important events, like meeting other kings and other official ceremonies. One can go inside the Royal Palace and learn about the history of Spanish monarchy.
Other famous buildings are: The Prado Museum, the Temple of Debod, the Santiago Bernabeú Stadium and the Cuatro Torres Business Area.
Art galleries
There are a lot of very big and important art museums in Madrid. The most famous ones are the Prado Museum, the Queen Sofia Museum, and the Thyssen-Bornemisza museum. These show off paintings, sculptures, and other works of art from some of the most famous artists in the world.
Many famous, important, and valuable works of art are in these museums. For example, the Queen Sofia museum has a famous painting by Pablo Picasso, called Guernica. Picasso painted this painting to show how sad and angry it made him when the German Nazis destroyed a town in Spain called Guernica in 1937. Picasso had said that the painting should never return to Spain until it was a democracy again. Once that happened, they built the Queen Sofia museum just to have a good place to put it.
Other sights
There are many other sights to see in Madrid. Many people go to see the Plaza Mayor which was a market place. The Plaza de la Villa was another famous market place. There are a lot of shops along the Gran Via. Real Madrid football fans celebrate at the Plaza de Cibeles. Two famous gates to see are the Puerta del Sol and the Puerta de Alcalá. A more recent landmark is the Almudena Cathedral.
Madrid has some lovely parks. The Retiro Park is the most famous. The Cristal Palace can be found in this park.
The Plaza de Toros is visited by many tourists. Bullfights take place there.
References
Other websites
Madrid’s official tourist website
Madrid´s English on line magazine
French wiki entry explaining more about Guernica
WorldFlicks in Madrid: Photos and interesting places on Google Maps
Capital cities in Spain
9th-century establishments in Europe
Establishments in Spain |
474 | https://simple.wikipedia.org/wiki/Montreal | Montreal | Montreal (, spelled Montréal in French) is a city in the country of Canada. It is the largest city in the province of Quebec and the second-largest city in Canada. It is the second-largest French-speaking city in the world after Paris.
Montreal is built on an island sitting in the Saint Lawrence River. More than three million people live in the Montreal region. At the centre of Montreal is a mountain called Mount Royal. The suburb of Westmount is a very rich suburb on the island of Montreal.
Most of the people who live in Montreal speak French.
History
The name 'Montréal' comes from Mont Royal, which means 'Royal Mountain' in French. It was originally called Ville-Marie, or City of Mary.
Montreal has always played a very important part in the history and development of Canada. It continues to be a large Canadian industrial and commercial centre, as well as a major seaport (via the Saint Lawrence River). It once was the largest city in Canada, before Toronto grew to be larger.
Tourists visit Montreal for its historical and cultural interest. One can visit the Old City in horse-drawn carriages, where many buildings from the earliest years stand and remind of the way of life that started in the New World, when Montreal was just a fur trading outpost belonging to France over 350 years ago.
Geography
Montreal is in the southwest of Quebec, 530 kilometres north of New York City. The city itself is located on an island, the Island of Montreal. Near the downtown area, there is a hill called Mount Royal (Mont Royal in French).
Economy
Montreal's economy is the second largest in Canada. The city's port is the biggest inland port (a port that is not on the sea) in the world. Many large corporations have their main offices in Montreal. It also hosts many international organizations like ICAO, the World Anti-Doping Agency, and IATA. The city is home to four major Universities, welcoming students from all parts of Canada and from all over the world.
Montreal is also known for its cultural production sector. Because the city has many different buildings, movies are easy to film there. The circus troupe (group) Cirque du Soleil is from Montreal. The city is also known for its festivals, like the Montreal Jazz Festival and Just For Laughs.
Some video game companies like Ubisoft also have studios in Montreal.
Culture
Montreal is the cultural capital of Quebec and French-speaking Canada.
Montreal has many beautiful churches (Montreal is referred to locally as 'the city of a hundred churches'), including the largest church in Canada, and also many important art, history, and science museums. You can also visit the location of the 1967 World's Fair, where today, as well as many other attractions, one will find the Circuit Gilles Villeneuve Formula One automobile race course. Also of interest is the site where the 1976 Summer Olympic Games were held, and the modern architecture of the Olympic stadium (the 'Big O') and its tall inclined observation tower (the highest inclined tower in the world); now a landmark of Montreal.
Ice hockey was invented in Montreal. A lot of Montrealers are interested in the sport, and the city is home to its own ice hockey team called the Montreal Canadiens who play in the National Hockey League (NHL).
Media
CKAC 730
CBFT SRC
CFTM TVA
CIVM Tele-Quebec
CFJP TQS
CFTU Canal Savoir
References
Other websites
Official website
Montreal -Citizendium
Olympic cities |
476 | https://simple.wikipedia.org/wiki/Macadamia%20nut | Macadamia nut | The macadamia nut is the fruit of a tree that first came from the east coast of Australia. There is
more than one kind of Macadamia tree. Only two kinds are grown for food.
The tree is an evergreen (stays green all year long). It grows up to high. It has groups of small white flowers. It grows best in subtropical (wet and always warm) climates. It needs well-drained soil (water can flow away easily) and of rain a year.
The nutmeat (the soft part inside the shell that can be eaten) is mostly a creamy white color. Sometimes it looks a bit yellow. It has a flavor that many people like. Macadamias are eaten roasted (cooked) by themselves. They are used in cookies, cakes, pastries, and candies. People use them like almonds and cashews as part of cooked meals. This is an Oriental style of cooking.
The first commercial orchard was started in Australia in the late 1880s. Commercial production started in Hawaii during the 1920s. Production later spread to California, Mexico, and other places with warm climate.
Macadamias are poisonous to dogs. A dog usually needs 24 to 48 hours to recover fully after eating macadamias.The plant is in the Proteaceae family of flowering plants.
References
Edible nuts and seeds |
477 | https://simple.wikipedia.org/wiki/Maui | Maui | Maui is the second largest of the Hawaiian Islands, in the United States.
It has a population of just over 100,000 and is 727 square miles (1883 km²) in size. Maui is part of Maui County, Hawaii. The larger (or better known) towns include Kahului, Wailuku, Lahaina, Hana, and Wailea. Main industries are agriculture and tourism.
Maui was named for the demi-god Maui. In Hawaiian legend, he raised all the islands from the sea. Maui is also known as the "Valley Isle" for the large fertile isthmus (narrow land connection) between two volcanoes.
Geography
Maui is a volcanic doublet: an island formed from two volcanic mountains that are joined. The older volcano, Mauna Kahalawai, is much older and has been very worn down. In common talk it is called the West Maui Mountain. The larger volcano, Haleakala, rises above 10,000 feet (3,050 m). The last eruption of Haleakala happened over 200 years ago, and this lava flow can be seen between Ahihi Bay and La Perouse Bay on the southeast shore.
Places
Other places on Maui popular with visitors include:
Ī'ao Valley.
Haleakala crater
Road to Hāna
Wai'ānapanapa
Golf courses on Maui include:
Grand Waikapu Country Club
Ka'anapali Golf Course
Kapalua Golf Club
Makena Golf Club
Maui Country Club
Pukalani Country Club
Sandalwood Country Club
Silversword Golf Course
Wai'ehu Municipal Golf Course
Wailea Golf Club
Islands of Hawaii |
478 | https://simple.wikipedia.org/wiki/Molokai | Molokai | Molokai (sometimes mistakenly called Molokaʻi) is the fifth largest island in the U.S. Hawaiian Islands. The island is 38 miles long and 10 miles across. Its land area is 261 square miles. The highest mountain is named Kamakou, and it is 4,970 feet (1,514 meters) high.
Molokai has many local indigenous names including Molokai 'Aina Momona (land of abundance), Molokai Pule O'o (land of powerful prayer), and Molokai Nui A Hina (of the goddess Hina). It is one of the least developed of the Hawaiian islands.
The only big town is named Kaunakakai, which is also the main or chief port on the island. The airport is in Central Molokai. Also on the island is Kalaupapa, which is a place for people who have a diease called leprosy.
Molokai has many Hawaiian fish ponds along its south shore. Many of these have been cleaned and fixed.
Islands of Hawaii |
479 | https://simple.wikipedia.org/wiki/Money | Money | Money, also sometimes called currency, can be defined as anything that people use to buy goods and services. Money is what many people receive for selling their own things or services.
There are lots of different kinds of money in the world. Most countries have their own kind of money, such as the United States dollar or the British pound.
History
The idea of bartering things is very old. A long time ago, people did not buy or sell with money. Instead, they traded one thing for another to get what they wanted or needed. One person who owned many cows could trade with another person who had a lot of wheat. Each would trade a little of what he had with the other. This would support the people on his farm. Other things that were easier to carry around than cows also came to be held as valuable. This gave rise to trade items such as jewelry and spices.
When people changed from trading in things like, for example, cows and wheat to using money instead, they needed things that would last a long time. They must still have a known value, and could be carried around. The first country in the world to make metal coins was called Lydia. These first appeared during the 7th century BC, in the western part of what is now Turkey. The Lydian coins were made of a weighed amount of precious metal and were stamped with a picture of a lion. This idea soon spread to Greece, the rest of the Mediterranean, and the rest of the world. Coins were all made to the same size and shape. In some parts of the world, different things have been used as money, like clam shells or blocks of salt.
Besides being easier to carry than cows, using money had many other advantages. Money is easier to divide than many trade goods. If someone own cows, and wants to trade for only "half a cow's worth" of wheat, he probably does not want to cut his cow in half. But if he sells his cow for money, and buys wheat with money, he can get exactly the amount he wants.
Cows die, and wheat rots. But money lasts longer than most trade goods. If someone sells a cow for money, he can save that money away until he needs it. He can always leave it to his children when he dies. It can last a very long time, and he can use it at any time.
Not every cow is as good as another cow. Some cows are sick and old, and others are healthy and young. Some wheat is good and other wheat is moldy or stale. So if a person trades cows for wheat, he might have a hard time arguing over how much wheat each cow is worth. However, money is standard. That means one dollar is worth the same as another dollar. It is easier to add up and count money, than to add up the value of different cows or amounts of wheat.
Later, after coins had been used for hundreds of years, paper money started out as a promise to pay in coin, much like an "I.O.U." note. The first true paper money was used in China in the 10th century AD. Paper money was also printed in Sweden between 1660 and 1664. Both times, it did not work well, and had to be stopped because the banks kept running out of coins to pay on the notes. Massachusetts Bay Colony printed paper money in the 1690s. This time, the use became more common.
Today, most of what people think of as money is not even things you can hold. It is numbers in bank accounts, saved in computer memories. Many people still feel more comfortable using coins and paper, and do not totally trust using electronic money on a computer memory.
Kinds
Many types of money have been used at different times in history. These are:
Cowry shells
Commodity money
Convertible paper money
Inconvertible money
Bank deposits
Electronic money
Commodity money can be used for other purposes besides serving as a medium of exchange. We say it possesses intrinsic value, because it is useful or valuable by itself. Some examples of commodity money are cattle, silk, gold and silver. Convertible paper money is money that is convertible into gold and silver. Gold and Silver certificates are convertible paper money as they can be fully convertible into gold and silver.
Inconvertible money is money that cannot be converted into gold and silver. Notes and coins are inconvertible money. They are inconvertible and are declared by the government money. Such fiat money is a country's legal tender. Today, notes and coins are the currencies used in bank deposits.
Types of bank deposits:
Demand deposits
Savings deposits
Time deposits
Negotiable certificate
More reading
Ferguson, Niall (2008). The Ascent of Money: A Financial History of the World. Allen Lane.
Davies, Glyn (2010). History of Money: From Ancient Times to the Present Day (Fourth ed.). University of Wales Press.
References
Other websites
Linguistic and Commodity Exchanges by Elmer G. Wiens. Examines the structural differences between barter and monetary commodity exchanges and oral and written linguistic exchanges.
Basic English 850 words |
482 | https://simple.wikipedia.org/wiki/Multiplication | Multiplication | Multiplication is the inverse of division, and has many uses, one of them being checking your division work.
Multiplication is an arithmetic operation for finding the product of two numbers in mathematics. It is often represented by symbols such as and . Multiplication is the third operation in math, after addition which is the first, and subtraction which is the second. It can also be defined on number mathematical objects as well.
With natural numbers, multiplication gives the number of tiles in a rectangle, where one of the two numbers equals the number of tiles on one side, and the other number equals the number of tiles on the other side.
With real numbers, multiplication gives the area of a rectangle where the first number is the same as the size of one side, and the second number is the same as the size of the other side.
For example, three multiplied by five is the total of five threes added together, or the total of three fives. This can be written as 3 × 5 = 15, or spoken as "three times five equals fifteen." Mathematicians refer to the two numbers to be multiplied as "coefficients", or "multiplicand" and "multiplicator" separately (where Multiplicand × multiplicator = product).
Multiplication between numbers is said to be commutative—when the order of the numbers does not influence the value of the product. This is true for the integers (whole numbers), e.g. 4 × 6 is the same as 6 × 4, and also for the rational numbers (fractions), and for all the other real numbers (representable as a field in the continuous line), and also for complex numbers (numbers representable as a field in the plane). However, it is not true for quaternions (numbers representable as a ring in the four-dimensional space), vectors or matrices.
The definition of multiplication as repeated addition provides a way to arrive at a set-theoretic interpretation of multiplication of cardinal numbers. A more accurate representation is to think of it as scaling quantities. This animation illustrates 3 being multiplied by 2, giving 6 as a result. Notice that the blue dot in the blue segment of length 3 is placed at position 1, and the blue segment is scaled so that this dot is placed at the end of the red segment (of length 2). For multiplication by any X, the blue dot will always start at 1 and end at X. This works even if X is smaller than 1, or negative.
The opposite of multiplication is division.
Multiplication table
Teachers usually require their pupils to memorize the table of the first 9 numbers when teaching multiplication, so that more complex multiplication tasks can be performed.
Related pages
Addition
Division (mathematics)
Square number
Subtraction
References
Arithmetics
Hyperoperations |
483 | https://simple.wikipedia.org/wiki/Microsoft | Microsoft | Microsoft Corporation is a company that makes computer software and video games. Bill Gates and Paul Allen started the company in 1975. Microsoft makes Microsoft Windows, Microsoft Office (including Microsoft Word), Edge, MSN and Xbox, among others. Most Microsoft programs cannot be downloaded for free–people have to buy them in a shop or online. Some products (like the Windows operating system) are often already installed when people buy a new computer.
Software
Microsoft Windows is an operating system, which means that it is the basic software that makes people's computers work and lets other programs work. The majority of desktop and laptop computers run Windows, and so do some tablet computers and a few smartphones. The latest version of Windows is Windows 11. The latest server version is Windows Server 2022.
Microsoft Office is an office suite. It lets people write documents on their computer with Microsoft Word, make charts and graphs with Microsoft Excel, make presentations with Microsoft PowerPoint, and send email with Microsoft Outlook. Microsoft SharePoint is a server tool included in Microsoft Office (2007, 2013). Microsoft Expression series was a web development tool.
Internet Explorer is a piece of software that lets people look at things online (known as browsing) and download things from the Internet. In 2015, it was replaced by Microsoft Edge.
Microsoft also makes other programs for the Internet. Many of them are called Windows Live services, with the name Windows Live put in front of the old name of the service, like Windows Live Hotmail. After 2012, the Windows Live name was less used.
Microsoft Bing is an internet search engine for finding things online. Bing Maps shows maps.
Microsoft BASIC is the very first product made by Microsoft. It was created in 1975.
Xenix is the first operating system licensed and then developed by Microsoft in the late 1970s.
MS-DOS is the second operating system acquired and then developed by Microsoft in 1981, used for primitive computers and terminals.
Minecraft and many other programs have been bought by Microsoft and developed further.
Services
Although Microsoft is best known for its software products, the company also runs a number of web services. They include:
Outlook.com is a webmail service. When Microsoft created this service in 1996, it was called Hotmail. It is used to send and receive email, manage a calendar of events and tasks, and a list of contacts (such as phone numbers and email addresses).
OneDrive is a file hosting service. It was started in 2007 and was called "SkyDrive" at the time. Users can upload files to a web server and get them on a variety of devices, including PCs and mobile devices.
Skype is a VoIP and social media service. It was not created by Microsoft, but by a company called Skype SARL, which was later bought out by Microsoft. The Skype program or mobile app lets people make phone calls through the Internet to other Skype users for free and, for a fee, landline phones.
LinkedIn is a social networking service for people with professional jobs. Like Skype, it was not created by Microsoft but by another company which Microsoft later bought. The site lets people post information about their jobs and skills to help employers look for new people to hire.
MSN is a web portal where people can read news and get information about different topics. It was created in 1995 and at one point its services were made under the brand name of "Windows Live". MSN used to have an instant messaging service, MSN Messenger, but that has since become part of Skype.
Bing is a search engine similar to Google. It used to be under the MSN brand and was later known as Live Search, but became its own service in 2009. Bing is known for the different images that appear on the background of its home page.
Hardware
Microsoft has also made a wide variety of hardware over the years. Among them are computer accessories like mice, keyboards, and webcams.
The company also makes and promotes a video game console, Xbox. It lets people play video games on their televisions. The games were first stored on CDs, but many recent games are downloaded from the Internet. There have been three generations of Xbox. The first generation came out in 2001 and was just called Xbox, while the second, the Xbox 360, was released in 2005. The third model is the Xbox One in May 2013. In 2020, Microsoft introduced Xbox Series X and Xbox Series S. Beginning with the Xbox 360, Microsoft introduced Xbox Live, which lets people play games online against other people anywhere in the world. The Xbox has become very popular and more than 150 million units have been sold worldwide. Because of this, Microsoft is considered one of the three big companies that make video game consoles, along with Nintendo and Sony.
Most recently, Microsoft has also started to make its own PCs, called the Surface. The first model was announced in 2012 and the Surface line now includes tablets that use either ARM or Intel processors, two models of laptops called the Surface Book and Surface Laptop, an all-in-one PC called the Surface Studio, and an interactive whiteboard, the Surface Hub.
In 2014, Microsoft bought the mobile phone division of Nokia, a Finnish company, which then became Microsoft Mobile. The sale included the Lumia family of smartphones, which use Microsoft's own Windows Phone platform. From 2014 to 2016, Microsoft Mobile also made feature phones with the Nokia brand. Then the feature phone business was sold to HMD global, which continues to produce both feature phones and Android smartphones under license from Nokia.
References
Other websites
Main Microsoft Website
1975 establishments in the United States
Bill Gates |
485 | https://simple.wikipedia.org/wiki/Islamic%20world | Islamic world | The Islamic world or Muslim world consists of all people who believe in Islam. It is not an exact location, but rather a community. When they do things together as Muslims, they are the "umma", which means "community" referring to all of the believers. The faith emphasizes unity and defense of fellow Muslims, so it is common for these nations to cooperate. Recent conflicts in the Muslim World have sometimes spread because of this desire to cooperate (see below). It is also likely that some have been made shorter and less damaging because of it. Some might even have never started.
Demographics
Muslims are in many countries. In 52 nations, Muslims are the majority. Almost all are Sunni. They speak about 60 languages and come from all ethnic backgrounds.
10.4 million Muslims in Canada and the United States
2.2 million Muslims in Latin and Central America
10.0 million Muslims in the European Union plus Bosnia-Herzegovina and Albania
few or none in Eastern Europe, Norway
62.4 million Muslims in Turkey
284.4 million Muslims in the Arab League including Iraq (with about 15 million Shia, 60% of the population)
254.0 Muslims in Sub-Saharan Africa
65.4 million Muslims (90% Shia) in Iran
48.5 million Muslims in Central Asia - in Azerbaijan, Uzebekistan, Tajikistan, Kazakhstan, Kyrgyzstan, Turkmenistan - formerly republics of the Soviet Union.
26.7 million Muslims in Russia
22.7 million Muslims in Afghanistan
230.0 million Muslims in Pakistan and Bangladesh (formerly East Bengal provincial region).
133.3 million Muslims in India (included Jammu and Kashmir) - the world's largest minority population
133.1 million Muslims in China - a close second
34.6 million Muslims in Somalia
196.3 million Muslims in Indonesia
30.0 million Muslims in the rest of South-East Asia, especially Malaysia
few or none in Japan, Australia, New Zealand, Mongolia, or the South Pacific
1.5 billion people total
Media
The Al-Jazeera satellite TV network in the Arabic language is a news source many Muslims watch.
In most Muslim nations, the government is the main source of news. This sometimes makes it very difficult or dangerous to make anti-government statements.
There are, however, many other news programmes and websites in the Muslim world.
Islam in law and ethics
Islamic law exists in many variations - in Arabic it is called shariah - five schools of which were created centuries ago. These are the classical fiqh: the Hanafi school from India, Pakistan and Bangaladesh, West Africa, Egypt, the Maliki in North Africa and West Africa, the Shafi in Malaysia and Indonesia, the Hanbali in Arabia, and Jaferi in Iran and Iraq - where the majority is Shia. All five are very old and many Muslims feel a new fiqh must be created for modern society. Islam has a method for doing this, al-urf and ijtihad are the words to describe this method, but they have not been used in a long time, and few people are trusted enough to use them to make new laws.
So, in most of the Muslim world, people are very conservative, especially about alcohol, adultery, abortion and women working in jobs where they are used to lure customers.
Muslim women often dress extremely modestly, and many do so by choice. But in some countries they have been forced to do so against their will. This is one of the things that causes tension between the Western World and that of Muslims.
Islamic economics bans debt but in most Muslim countries Western banking is allowed. This is another issue that many Muslims have with the Western world.
Islam in politics
One quarter of the world population share Islam as an ethical tradition.
Many people in these countries also see Islam as a political movement. In democratic countries there is usually at least one Islamic party.
Political Islam is powerful in all Muslim-majority countries. Islamic parties in Pakistan and Algeria have taken power.
Many in these movements call themselves Islamists, which also sometimes describes more militant Islamic groups. The relationships between these groups and their views of democracy are complex.
Some of these groups are called terrorists because they attack civilians of other non-Muslim nations, to make a political point.
Conflicts with Israel and the US
Israel is very unpopular in the Muslim world, because of the Israeli-Palestinian conflict and the way that the state of Israel came into being in 1948 which many Arabs thought was unfair.
Some Muslims see this as a fight against Judaism or Jews, but not all. In Morocco for instance, the Islamists recently invited Jews to join the party. Jewish groups also cooperate with Arabs in the West Bank, where Neturei Karta (anti-Zionist orthodox Jewish) leader Rabbi Mosche Hirsch served as the Minister for Jewish Affairs in the Fatah before there was a Palestinian Authority. Like the Arabs, this small group of Jews thought the way Israel was created was not right. However, very few Jews believe this, and most support Israel as a state.
In 1979 there was a big shift in the way the Muslim world dealt with the rest of the world. In that year, Egypt made peace with Israel, Iran became an Islamic state after a revolution, and there was an invasion of Afghanistan by the Soviet Union. A lot of things changed in that year. By 2001 the Soviet Union was gone, Jordan had also made peace with Israel, and on September 11, 2001 there were major attacks on the U.S. - which most people believe were made to drive the United States out of the Muslim world, especially Saudi Arabia. In many ways the events of 1979 led to the events of 2001.
The 2001 invasion of Afghanistan and 2003 invasion of Iraq are called part of a War on Terrorism by the United States. Many or most Muslims see it as a War on Islam. After the invasion, the Islamic parties won more seats, and a majority of Muslims polled in many nations expressed support for Osama bin Laden and said he would "do the right thing". Olivier Roy is a French scholar who thinks that this does not express support for al-Qaeda or militant Islam but opposing colonialism and what many Muslims call racism - favourable treatment for Jews especially those living in West Bank settlements, many of whom have American or British passport, and which the United Nations says have no right to live there.
The situation is very complicated and there are many different views of it.
Organization
The Organization of Islamic Conference formed in 1969 lets the Muslim nations work as a group. Russia joined in 2003.
The Arab League is a smaller group of only the Arab countries.
OPEC is another forum where issues between the Muslim and non-Muslim world come up. In 1973 to protest U.S. support for Israel there was an oil embargo which caused the 1973 energy crisis.
Related pages
History of Islam
Hajj
World |
487 | https://simple.wikipedia.org/wiki/Multiverse | Multiverse | A multiverse is the theory of a conjectured set of multiple possible universes, including ours, which make up reality. These universes are sometimes called parallel universes. A number of different versions have been considered.
The word "multiverse" was created in 1895 by psychologist William James as a philosophical concept.
The cosmological multiverse
The cosmological multiverse tries to explain why the universe we can see sometimes called ''our universe'' is one that life can exist in. Even small changes to the way physics works would make life impossible. In a multiverse a large number of universes are randomly created and some happen to favour life emerging there. Many inhospitable universes would also have been created, but there would be no life there to observe their existence.
The quantum multiverse
The quantum multiverse is another version in which our universe splits into alternative futures with every quantum event. This is called many-worlds interpretation of quantum mechanics.
Related pages
Quantum immortality
Further reading
References
Cosmology
Physics
Astrophysics
Universe |
490 | https://simple.wikipedia.org/wiki/Mechanistic%20paradigm | Mechanistic paradigm | The mechanistic paradigm, also known as the Newtonian paradigm, assumes that things in the environment around humans are more like machines than like life. It was more common in the 19th century. This is a set of loosely related beliefs that affects all sciences:
In physics it presents atoms as made of particles in preference to say the wave theory of light. In fact, both the particle and wave view are required to explain everything light does, but are rarely presented as equals. Many physics students graduate fully understanding the hydrogen bomb but having no clear idea of how musical instruments work.
In astrophysics it assumes that the universe is like clockwork and works on its own without our choice making any difference - this fits relativity but is not easy to combine with quantum mechanics.
In cosmology it accepts models of our universe more easily if reject the continuous creation of matter, energy or any new "other universes".
In chemistry it assumes that molecules are like building blocks, and have no unpredictable or strange and unique effects when combined. This is the basic assumption of mechanosynthesis which some scientists think will create a molecular assembler.
In biology it assumes that everything about life - all of biochemistry - is predictable from chemistry and physics.
Believers tend to regard ecology and psychology as "less scientific" than physics, chemistry and biology.
Believers may reject ideas like psychoneuroimmunology, Gaia philosophy or Fecund universes for no scientific reason, simply because these theories assume "higher level phenomena" sometimes drive lower levels.
Greedy Reductionism may be more likely among believers in mechanistic ideas. For instance, they may want to always see things as made of smaller, even invisible, parts that no one can see or prove is real - like in string theory.
For this reason, when they work in psychology, they may prefer theories like behaviorism that deny free will and try to explain human behaviour as a function of biology.
The philosophy of mathematics of most believers is a form of Platonism. This assumes there is a perfect or ideal form that theories only approximate. This lets them explain inaccuracies in mechanistic theories as being due to an imperfection in human ability to reason, instead of imperfections in math itself.
Believers in this paradigm sometimes say that those who do not believe in it are following a cognitive paradigm - but almost no one uses this term, since it is redundant - cognitive science is already accepted as the most basic idea in the philosophy of science. But mechanists reject some of the ideas of cognitive scientists, like cognitive science of mathematics.
Mechanistic thinking also assumes that philosophy of perception is much less important than cognitive scientists say it is - that humans and their beliefs and equipment do not generally add a lot of bias to a scientific theory. Thomas Kuhn said otherwise, that these things matter, and that the major assumptions of science, can shift drastically. This he called a paradigm shift. The shift from mechanistic to cognitive paradigm is an example of this.
Later he used other words to describe the assumptions and beliefs, like mind-set, but the word "paradigm" is still used. Some say it is much over-used.
Economics is often said to "suffer from" assumptions of the mechanistic paradigm. Sometimes those who believe in neoclassical economics and also in the mechanistic paradigm say they "seek to unify physics and economics," as if people and particles behaved as two examples of the same kind of thing.
Technology is often easier to make if people accept a mechanistic paradigm - but it may be harder to say why it does not work, if one believes in these ideas. For instance, creating diagnostic trees might be easier if one works from experience, not from an idea of how a technology should or must work.
A controversial idea is that mechanistic ideas are just an older idea called scholasticism, with more mathematics. Both tried to work from what should or must be, instead of what experiment seemed to show.
Another controversial idea is that scientism, belief in science as if it were a religion or ethical tradition, comes from this paradigm. Most scientists who are mechanistic do not say they see science as a guide to ethics, but try to keep them separate.
Physics
Chemistry
Biology
Philosophy of science |
495 | https://simple.wikipedia.org/wiki/MediaWiki | MediaWiki | MediaWiki is the name of the software that runs all of the Wikimedia projects and many more. MediaWiki was released in 2003. It is a free server-based software which is licensed under the GNU General Public License (GPL). This means it is free content, or open source.
MediaWiki is designed to be run on a large web server farm for a website that gets millions of hits per day. MediaWiki is a very powerful, scalable software and a feature-rich wiki implementation. It uses PHP to process and display data stored in its MySQL database. Pages use MediaWiki's Wikitext format, so that users without knowledge of XHTML or CSS can edit them easily.
When a user submits an edit to a page, MediaWiki writes it to the database, but without deleting the previous versions of the page, thus allowing easy reverts in case of vandalism or spamming. MediaWiki can manage image and multimedia files, too, which are stored in the filesystem. For large wikis with lots of users, MediaWiki supports caching and can be easily coupled with Squid proxy server software.
All Wikimedia projects run on MediaWiki version .
Usage
Because MediaWiki is flexible, many websites that want people to contribute information use MediaWiki rather than other types of wiki software. Those operated by Fandom are among them.
There are also some websites that use MediaWiki as a content management system.
Extensions
In MediaWiki, a system administrator can choose to install extensions which are provided on the main MediaWiki website. Some are from the MediaWiki developers, while others are from programmers from all around the world.
Most extensions can be download from Wikimedia's Subversion repository. However, there are some other extensions that other people host themselves.
Some extensions had been added to the main software along the development of MediaWiki. For example, the Makesysop extension is an extension to promote a user into an administrator or a bureaucrat.
There were a total of 2124 extensions as of October 4, 2013.
Namespaces
In the default installation of MediaWiki, the software has 17 namespaces(18 actually, but one does not have a namespace), namely:
Article (No namespace, like this page)
Talk – for main namespace talk page
User – the user page, also from Special:MyPage
User talk – the user talk page, also from Special:MyTalk
Project – The project namespace (like on this wiki, is Wikipedia)
Project talk – The project page talk page
File – Page for images and sounds
File talk – Talk about the media
MediaWiki – Software pages, can only be changed from an administrator
MediaWiki talk – Talk about the software page, anyone can write in this namespace
Template – for templates
Template talk – talk about the template
Help – Help pages (like Help:Contents)
Help talk – talk about the help page
Category - Categorising pages
Category talk – talk about the category
Special – Special pages of the MediaWiki software
Media – Namespace to directly link to the file
Additional namespaces can be added using the settings file from the installation of MediaWiki.
Bugs
As MediaWiki is a complex software, there would always be bugs in the software, especially for new extensions. Therefore, Wikimedia has created a Bugzilla website for people who see a bug to tell the developers of MediaWiki.
Some extensions of MediaWiki use the Wikimedia Bugzilla, while some just use the talk pages of the extension page.
Skins
Users can change MediaWiki's appearance. They may use one of the several "skins". At different times different skins have been default. For example, Wikipedia once used Monobook before adopting the new Vector skin in version 1.16.
A survey done by Wikimedia showed that more people prefer the Vector skin.
More information
More information about the software:
Main MediaWiki website
MediaWiki on Meta Wiki
MediaWiki User's Guide on Meta Wiki
PHP script FAQ
PHP script automatic wikification (former feature)
How to become a MediaWiki hacker (installation advice)
References
Other websites
Wikitech-L mailing list (technical discussions regarding the development)
Sites using MediaWiki
Sourceforge: MediaWiki Project page Now changed to MediaWiki.org.
Sourceforge: MediaWiki Bug reports Now changed to Wikimedia Bugzilla.
Sourceforge: MediaWiki Feature requests Now changed to Wikimedia Bugzilla.
Translatewiki.net – The place to translate MediaWiki messages.
Wiki software
Wikimedia
Websites established in 2002
Cross-platform software |
497 | https://simple.wikipedia.org/wiki/First%20language | First language | A first language (also mother language, mother tongue, native language, arterial language, or L1) often means the language that a person learns first. It helps one understand words and concepts in the style of that language.
Sometimes, but not often, first language means the language that a person speaks best (the second language is then spoken less well than the first language, etc.). In that sense, a person could have more than one first or second language.
The first languages of national majority usually are to be recognized as national language of the nation.
References
Related pages
Soweto Uprising
Language |
500 | https://simple.wikipedia.org/wiki/Mustache | Mustache | The hair that grows on the upper lip of some men is called a mustache. The hair that grows on the sides of the face and the chin of some men is called a beard. Some men have a lot of hair and a big mustache, and some have very little. In the modern world, many men shave part or all of their mustaches, or cut their mustache so it does not get very long. A chin beard with no mustache is called a goatee, whilst a chin beard with a mustache is known as a Van Dyke.
The earliest facial hair above the lip, as a style, is credited to the Iron Age Celts. Diodorus Siculus, a Greek historian,wrote this about the Celtic people:
Mustache in United Kingdom and Commonwealth of Nations is spelled moustache.
Some animals such as walruses also have hair like this, and people sometimes also call this hair a mustache.
Facial hair |
501 | https://simple.wikipedia.org/wiki/Mile | Mile | A mile is a unit of length. There are many different kinds of mile but mile on its own usually means the statute mile.
Statute mile
In the US and the UK the word mile usually means the statute mile.
Nautical mile
The nautical mile is used for sea or air travel.
The nautical mile was originally defined as one minute of arc along a line of longitude of the Earth. There are 60 minutes of arc in one degree or arc (60' = 1°). So there were 10,800 nautical miles from the North Pole to the South Pole.
Now the nautical mile is defined as 1,852 metres.
{|
|-
|1 nautical mile||= 1,852 metres (by definition)
|-
|||≈ feet
|-
|||≈ statute miles
|}
The speed of a ship that travels one nautical mile in one hour is called one knot
Roman mile
The mile was first used by the Romans. It comes from the Latin phrase mille passus (plural: milia passuum). This means "one thousand paces". A pace is the distance each foot moves when taking one step.
{|
|-
|1 Roman mile||= 1,000 Roman paces (by definition)
|-
|||≈ 1,479 metres
|-
|||≈ 4,852 feet
|}
Other miles
Different miles have been used throughout history in various parts of the world. In Norway and Sweden, for example, a mil is a unit of length which is equal to 10 kilometres.
Idioms
Even in English-speaking countries that use the metric system (for example, Australia, Canada, and New Zealand), the mile is still used in many idioms. These include:
A country mile is used colloquially to mean a very long distance.
"A miss is as good as a mile" (failure by a narrow margin is no better than any other failure)
"Give him an inch and he'll take a mile" – a corruption of "Give him an inch and he'll take an ell" (the person in question will become greedy if shown generosity)
"Missed by a mile" (missed by a wide margin)
"Go a mile a minute" (move very fast)
"Talk a mile a minute" (speak very fast)
"To go the extra mile" (to put in extra effort)
"Miles away" (lost in thought, or daydreaming)
"Milestone" (an event showing a lot of progress)
References
Imperial units
Units of length |
504 | https://simple.wikipedia.org/wiki/Margarine | Margarine | Margarine is an artificial butter. It can be made from vegetable oil, or animal fat. It may also contain skimmed milk, salt and emulsifiers. Margarine is used in many baked products. It contains less fat than butter, so is often chosen instead of it. There are also "low fat" margarines, which contain even less fat. However, many types of margarine are made with hydrogenated oils. Products with hydrogenated oil have trans fats, which are unhealthy and can cause heart disease. Other fats, like olive oil, and butter, are a better choice for cooking.
Spreads |
505 | https://simple.wikipedia.org/wiki/Milky%20Way | Milky Way | The Milky Way is our home galaxy. It contains around 400 billion stars, including our Sun.
The Milky Way has a diameter of about 170,000 or 200,000 light years, and is a barred spiral galaxy. The idea that the Milky Way is made of stars goes back to the Ancient Greek philosopher Democritus.
The Milky Way has three main parts: a disk, where the Solar System is, a bulge at the core, and an outer halo all around it. Although the word "disk" suggests it is flat, the Milky Way is actually not quite flat. It is slightly warped and twisted.
This galaxy belongs to the Local Group of three large galaxies and over 50 smaller galaxies. The Milky Way is one of the largest galaxies in the group, second to the Andromeda Galaxy. Its closest neighbour is the Canis Major Dwarf Galaxy, which is about 25,000 light years away from the Earth. The Andromeda Galaxy is moving towards the Milky Way Galaxy and will collide with it in about 3.75 billion years. The Andromeda Galaxy moves with a speed of about 1,800 kilometres per minute.
Size
The stellar disk of the Milky Way Galaxy is about 200,000 light-years (9×1017 km) in diameter, and is considered to be, on average, about 1000 light years thick.
It is estimated to contain at least 100 billion stars, and possibly up to 400 billion stars. The figure depends on the number of very low-mass, or dwarf stars, which are hard to detect, especially more than 300 light years from our sun. Therefore, present estimates of the total number are uncertain. This can be compared to the one trillion (1012) stars of the neighbouring Andromeda Galaxy.
The stellar disc of the Milky Way does not have a sharp edge, a radius beyond which there are no stars. Rather, the number of stars drops smoothly with distance from the centre of the Galaxy. Beyond a radius of about 40,000 light years, the number of stars drops much faster, for reasons that are not understood.
Extending beyond the stellar disk is a much thicker disk of gas. Observations indicate that the gaseous disk of the Milky Way has a thickness of around 12000 light years–twice the previously accepted value.
At 220 kilometers per second it takes the Solar System about 240 million years to complete one orbit of the Galaxy (a galactic year).
The Galactic halo extends outward but is limited in size by the orbits of two Milky Way satellites, the Large and the Small Magellanic Clouds, whose closest approach is at about 180,000 light years. At this distance or beyond, the orbits of most halo objects would be disrupted by the Magellanic Clouds, and the objects would likely be ejected from the vicinity of the Milky Way.
As a guide to the relative physical scale of the Milky Way, if the Solar System out to the orbit of Pluto were reduced to the size of a US quarter (about an inch or 25 mm in diameter), the Milky Way would have a diameter of 2,000 kilometers.
Galactic center
The galactic disc, which bulges outward at the galactic center, has a diameter of 170–200,000 light years.
The exact distance from the Sun to the galactic center is debated. The latest estimates give distances to the Galactic center of 25–28,000 light years.
The movement of material around the galactic center shows that it has a compact object of very large mass. The intense radio source named Sagittarius A*, thought to mark the center of the Milky Way, is now confirmed to be a supermassive black hole. Most galaxies are believed to have a supermassive black hole at their center.
Most galaxies have a central bar-shaped structure composed of stars. The nature of the Milky Way's bar is actively debated, with estimates for its half-length and orientation spanning from 3,300 to 16,000 light years (short or a long bar) and 10–50 degrees. Viewed from the Andromeda Galaxy, it would be the brightest feature of our own galaxy.
Mythology
In Greek mythology, Zeus places his son (the baby Heracles) whose mother was a mortal woman on Hera's breast while she is sleeping so that the baby will drink her divine milk and become immortal. However, Hera wakes up while she is breastfeeding the baby and realizes she is nursing a baby she does not know. According to Greek mythology, she then pushes the baby away and a stream of her milk sprays the night sky, making a faint band of light known as the Milky Way.
Related pages
Galaxy
Local Group
List of galaxies
References |
508 | https://simple.wikipedia.org/wiki/Movement | Movement | Movement, or motion, is the state of changing something's position or changing where something is. A bird that is flying is moving. So is a person who is walking. This is, because they change where they are. They "move" from one place to another. There are many forms of science and mathematics that are related to movement.
Because of the work of scientists including Galilei and Newton, we know that position is relative. This means that an object's position depends on where it exists in relation to other objects. For example, a ball can be away from a box, from a chair and away from a table. Here, the box, chair and the table helped to define the position of the ball. They acted as the reference points for the observation of the ball. By telling someone how far the ball was from other objects, they were told its relative position.
The motion of an object is also relative. It depends on how its position changes in relation to other objects. For example:
A person is sitting inside a train (Train A). The train has not started moving yet. When that person looks out the window, they see another train (Train B) . Both trains are facing the same direction. If Train B moves backwards, it appears to the person on Train A that they are moving toward Train B. If a reference point it added this can be changed. If the person can also see a pole next to the trains they will see that train A did not move and train B moved backwards.
From this, it is shown that what the movement is can not bo known without a frame of reference. In this example the pole is the frame of reference.
The study of motion without considering its cause is called kinematics. Kinematics deals with terms like speed, velocity, and acceleration. Dynamics is the branch of physics that focuses on the causes and effects of motion. It deals with force, inertia, work, energy and momentum.
Animal movement
The movement of animals is controlled by the nervous system, especially the brain and spinal cord.
The muscles that control the eye are driven by the optic tectum in the midbrain. All the voluntary muscles in the body are controlled by motor neurons in the spinal cord and hindbrain. Spinal motor neurons are controlled by neural circuits of the spinal cord, and by inputs from the brain. The spinal circuits do many reflex responses, and also do rhythmic movements such as walking or swimming. The descending connections from the brain give more sophisticated control.
The brain has several areas that project directly to the spinal cord. At the highest level is the primary motor cortex. This is a strip of tissue at the back of the frontal lobe. This tissue sends a massive projection directly to the spinal cord, through the pyramidal tract. This allows for precise voluntary control of the fine details of movements. There are other brain areas which affect movement. Among the most important secondary areas are the premotor cortex, basal ganglia, and cerebellum.
In addition, the brain and spinal cord controls the autonomic nervous system. this system works by secreting hormones and by modulating the "smooth" muscles of the gut. The autonomic nervous system affects heart rate, digestion, respiration rate, salivation, perspiration, urination, sexual arousal and several other processes. Most of its functions are not under direct voluntary control. Several of them, such as respiration, can be controlled directly as well.
Related pages
Newton's laws of motion
Transportation
Navigation
References
Mechanics |
510 | https://simple.wikipedia.org/wiki/Metaphor | Metaphor | Metaphor is a term for a figure of speech. It does not use a word in its basic literal sense. Instead, it uses a word in a kind of comparison. We run, and we also say rivers run. We may run into trouble, especially if we run up a bill at the bar.
So a metaphor uses words to make a picture in our mind. It takes a word from its original context, and uses it in another.
"I beat him with a stick" = literal meaning of 'beat'.
"I beat him in an argument" = metaphorical meaning of 'beat'.
Metaphors are an essential part of language: it is not possible to speak or write without them. A simple example is the word "run". This has a basic meaning of "moving quickly" or "go with quick steps on alternate feet, never having both feet on the ground at the same time". The Concise Oxford Dictionary then gives
34 other uses as a verb; 21 uses as a noun; about 50 uses in short phrases. All of these are metaphors, although we do not usually notice this.
We use metaphors to make indirect comparisons, but without using 'like' or 'as' – because that would be a simile. A simile is a direct comparison: "Jane is like a child".
A metaphor very often uses the verb 'to be': "love is war", for example, not "love is like war" (that is a simile).
Poetry includes much metaphor, usually more than prose.
Spam is an example that any email user knows about – this word was originally a metaphor, from 'Spam', a type of canned meat. Servers putting unwanted email into somebody's inbox was similar to waiters putting unwanted Spam into food. This was originally suggested by a Monty Python scene. When we use a metaphor very often and we forget the old meaning, or forget that the two meanings are connected, this is a 'dead metaphor'.
Originally metaphor was a Greek word for 'transfer'. It came from meta ('beyond') and pherein ('carry'). So the word metaphor in English was a metaphor, too. Today in Greek, metaphor is a trolley (a thing that is pushed for carrying shopping or bags).
Most metaphors are concepts: see conceptual metaphor.
Idioms use metaphors, or are metaphors: for example, the English phrase to kick the bucket means to die.
Simple metaphors
Description
A simple metaphor has a single link between the subject and the metaphoric vehicle. The vehicle thus has a single meaning which is transferred directly to the subject.
Examples
Cool down! [Cool = temperature]
He was mad. [mad = anger]
I'll chew on it. [chew = think]
It was raining cats and dogs. [cats and dogs = rain]
Max was an angel. [angel = lovely person]
In the simple metaphor, the effort to understand what the author or speaker intends is relatively low, and hence it may easily be used with a wider and less sophisticated audience.
Complex metaphors
Description
A complex metaphor happens where a simple metaphor is based on a secondary metaphoric element. For example, using a metaphor of 'light' for 'understanding' may be complexified by saying 'throwing light' rather than 'shining light'. 'Throwing' is an extra metaphor for how light arrives.
Examples
That lends weight to the argument.
They stood alone, frozen statues on the plain.
The ball happily danced into the net.
"But at my back I always hear / Time's wingèd chariot hurrying near / And yonder all before us lie / Deserts of vast eternity".From 17th century English poet Andrew Marvell's poem To His Coy Mistress.
Compound metaphors
Description
A compound metaphor is one where there are multiple parts in the metaphor that are used to snag the listener. These parts may be enhancement words such as adverbs, adjectives, etc.
Each part in the compound metaphor may be used to signify an additional item of meaning.
Examples
Awake! for Morning in the Bowl of NightHas flung the stone that puts the stars to flight. An aged man is but a paltry thing,
A tattered coat upon a stick..."
Thick, primal, blind fog descended before his eyes.
The car screeched in hated anguish, its flesh laid bare in the raucous collision.
Compound metaphors are like a multiple punch, hitting the listener repeatedly with metaphoric elements. Where the complex metaphor uses stacked layers to enhance the metaphor, the compound metaphor uses sequential words. The compound metaphor is also known as a loose metaphor.
Live and dead metaphors
A live metaphor is one which a reader notices. A dead metaphor is one no-one notices because it has become so common in the language.
Examples
Two people walk off a tennis court. Someone asks the loser: "What happened?"."He won". Literal truth."He beat me". Obviously a dead metaphor."He thrashed me". This one is slightly alive.The river runs. Dead, and many variations on this theme.Electricity is a fluid. Nearly dead.All our efforts are running into the sand''. Live.
Related pages
Trope
References
Other websites
A short history of metaphor.
Rhetorical figures in sound: |
511 | https://simple.wikipedia.org/wiki/Metabolism | Metabolism | Metabolism is the chemical reactions which keep us alive. It happens in the cells of living organisms.
The chemical reactions are catalyzed by enzymes. Metabolism allows organisms to grow, reproduce, maintain their structures, and respond to their environments. The word ‘metabolism’ can also refer to digestion and the transport of substances into and between different cells.
Metabolism is usually divided into two categories:
Catabolism breaks down organic matter and harvests energy by way of cellular respiration.
Anabolism uses energy to build molecules such as proteins and nucleic acids.
The chemical reactions of metabolism are organized into metabolic pathways, or cycles, like the Krebs cycle. One chemical is transformed through a series of steps into another chemical by a series of enzymes.
The metabolic system of an organism decides which substances it finds nutritious and which poisonous. For example, some prokaryotes use hydrogen sulfide as a nutrient, yet this gas is poisonous to animals. The speed of metabolism, called the metabolic rate, influences how much food an organism will need, and how it is able to get that food.
A striking feature of metabolism is the similarity of the basic metabolic pathways and components between even vastly different species. For example, the set of carboxylic acids that are best known as the intermediates in the citric acid cycle are present in all known organisms, being found in species as diverse as the unicellular bacterium Escherichia coli and huge multicellular organisms like elephants. These striking similarities in metabolic pathways are likely due to their early appearance in the evolution of life, and kept because of their efficiency.
Related pages
Catabolism
Anabolism
Metabolic rate
Metabolic syndrome
References |
512 | https://simple.wikipedia.org/wiki/Microscope | Microscope | A microscope is a scientific instrument. It makes small objects look larger. This lets people see the small things. People who use microscopes frequently in their jobs include doctors and scientists. Students in science classes such as biology also use microscopes to study small things.
The earliest microscopes had only one lens and are called simple microscopes. Compound microscopes have at least two lenses. In a compound microscope, the lens closer to the eye is called the eyepiece. The lens at the other end is called the objective. The lenses multiply up, so a 10x eyepiece and a 40x objective together give 400x magnification.
Microscopes make things seem larger than they are, to about 1000 times larger. This is much stronger than a magnifying glass which works as a simple microscope.
Types of microscopes
There are many types of microscopes. The most common kind of microscope is the compound light microscope. In a compound light microscope, the object is illuminated: light is thrown on it. The user looks at the image formed by the object. Light passes through two lenses and makes the image bigger.
The second most common kind are a few kinds of electron microscopes. Transmission electron microscopes (TEMs) fire cathode rays into the object being looked at. This carries information about how the object looks into a magnetic "lens". The image is then magnified onto a television screen. Scanning electron microscopes also fire electrons at the object, but in a single beam. These lose their power when they strike the object, and the loss of power results in something else being generated—usually an X-ray. This is sensed and magnified onto a screen. Scanning tunneling microscopes were invented in 1984.
A fluorescence microscope is a special kind of light microscope. In 2014, the Nobel Prize in Chemistry was awarded to Eric Betzig, William Moerner, and Stefan Hell for "the development of super-resolved fluorescence microscopy". The citation says it brings "optical microscopy into the nanodimension".
References
Other websites
Microscopy Information Information relating to optics, techniques and specimen preparation for teachers, students, amateur scientists.
Scanning electron microscope |
513 | https://simple.wikipedia.org/wiki/Mass | Mass | The mass of an object is a measure of the amount of matter in a body. A mountain has typically more mass than a rock, for instance. Mass should not be confused with the related but quite different concept of weight.
We can measure the mass of an object if a force acts on the object. If the mass is greater, the object will have less acceleration (change in its motion). This measure of mass is called inertial mass because it measures inertia.
A large mass like the Earth will attract a small mass like a human being with enough force to keep the human being from floating away. "Mass attraction" is another word for gravity, a force that exists between all matter. When we measure the force of gravity from an object, we can find its gravitational mass. Tests of inertial and gravitational mass show that they are the same or almost the same.
Units of mass
The unit of mass in the International System of Units is the kilogram, which is represented by the symbol 'kg'. Fractions and multiples of this basic unit include the gram (one thousandth of a kg, symbol 'g') and the tonne (one thousand kg), amongst many others.
In some fields or applications, it is convenient to use different units to simplify the discussions or writings. For instance,
Atomic physicists deal with the tiny masses of individual atoms and measure them in atomic mass units.
Jewelers normally work with small jewels and precious stones where masses are traditionally measured in carats, which correspond to 200 mg or 0.2 g.
The masses of stars are very large and are sometimes expressed in units of solar masses.
Traditional units are still in encountered in some countries: imperial units such as the ounce or the pound were in widespread use within the British Empire. Some of them are still popular in the United States, which also uses units like the short ton (2,000 pounds, 907 kg) and the long ton (2,240 pounds, 1010 kg), not to be confused with the metric ton (1,000 kg).
Conservation of mass and relativity
Mass is an intrinsic property of the object: it does not depend on its volume, or position in space, for instance. For a long time (at least since the works of Antoine Lavoisier in the second half of the eighteen century), it has been known that the sum of the masses of objects that interact or of the chemicals that react remain conserved throughout these processes. This remains an excellent approximation for everyday life and even most laboratory work.
However, Einstein has shown through his special theory of relativity that the mass m of an object moving at speed v with respect to an observer must be higher than the mass of the same object observed at rest m0 with respect to the observer. The applicable formula is
where c stands for the speed of light. This change in mass is only important when the speed of the object with respect to the observer becomes a large fraction of c.
The Quantum Concept of Mass
For further reference,see the :en:Gluon field and :en:Higgs boson
In atomic nuclei,i.e in :en:Protons and :en:Neutrons,the residual mass comes from the binding kinetic and potential energy of the quarks and gluon field. An analogy to go along with is to think of the 3 :en:quarks as balls with the gluons as a spring connecting the quarks. This mass accounts for ~99% of the mass of these :en:baryons with the remaining ~1% coming from the individual quarks which comes from quantum interactions with the Higgs field.
References
Related pages
Mass versus weight
Center of mass
Gravity
Density
Body mass index
Advanced topics:
Standard Model
Higgs field.
Physical quantity
Matter
Mechanics
Basic physics ideas |
514 | https://simple.wikipedia.org/wiki/Mercury%20%28planet%29 | Mercury (planet) | Mercury is the smallest planet in the Solar System. It is the closest planet to the sun. It makes one trip around the Sun once every 87.969 days.
Mercury is bright when we can see it from Earth. It has an apparent magnitude ranging from −2.0 to 5.5. It cannot be seen easily because it is usually too close to the Sun. Because of this, Mercury can only be seen in the morning or evening twilight or when there is a solar eclipse.
Less is known about Mercury than about other planets of our Solar System. Even with telescopes only a small, bright crescent can be seen. It is also hard to put a satellite in orbit around it. Two spacecraft have visited Mercury. The first one was Mariner 10. It only made a map of about 45% of the Mercury's surface from 1974 to 1975. The second is the MESSENGER spacecraft, which finished mapping Mercury in March 2013.
Mercury looks like Earth's Moon. It has many craters and smooth plains. It has no moons and little atmosphere as we know it. However, Mercury does have an extremely thin atmosphere, known as an exosphere. Mercury has a large iron core. Because of this Mercury has a magnetic field about 1% as strong as that of the Earth. It is a very dense planet because its core is large.
Temperature at the surface can be anywhere from about 90 to (−183 °C to 427 °C, −297 °F to 801 °F), with the subsolar point being the hottest and the bottoms of craters near the poles being the coldest.
Known sightings of Mercury date back to at least the first millennium BC. Before the 4th century BC, Greek astronomers thought that Mercury was two different objects: The one that they were only able at sunrise, they called Apollo; the other one that they were only able to see at sunset, they called Hermes. The English name for the planet is from the Romans, who named it after the Roman god Mercury. The symbol for Mercury is based on Hermes' staff.
Even though Mercury is the closest planet to the Sun, it is not the hottest. This is because it has no greenhouse effect. The heat that the Sun gives it, quickly escapes into space. The hottest planet is Venus.
Inside Mercury
Mercury is one of four inner planets in the Solar System. It is a terrestrial planet like Earth. It is the smallest planet in the Solar System. It has a radius of . Mercury is even smaller than some of the largest moons in the solar system, such as Ganymede, the largest moon of Jupiter and Titan, the largest moon of Saturn. However, it has in 2.2 times greater mass than Ganymede and around 2 times heavier than Titan. Mercury is made of about 70% metallic and 30% silicate material. Mercury has the second highest density in the Solar System at 5.427 g/cm³, only a little bit less than Earth’s.
Surface of Mercury
Mercury's surface looks like the surface of the Moon. It has plains that look like mares and has lots of craters. Mercury was hit by a lot of comets and asteroids 4.6 billion years ago. Mercury was also hit during a period called the Late Heavy Bombardment. Mercury has many craters because its atmosphere is too faint to slow objects down. Images from MESSENGER have shown that Mercury may have shield volcanoes.
The surface temperature of Mercury ranges from 100 to 700 K (−173 to 427 °C; −280 to 800 °F) at the most extreme places. Even though the temperature at the surface of Mercury in the day is very high, observations suggest that there is frozen water on Mercury.
Mercury is too small and hot for its gravity to keep any thick atmosphere for a long time. It does have a thin exosphere that is made up of hydrogen, helium, oxygen, sodium, calcium, potassium. This exosphere is blown away and replenished from lots of sources. Hydrogen and helium may come from the solar wind. Radioactive decay of elements inside the crust of Mercury is another source of helium, and also sodium and potassium.
Orbit and rotation
Mercury has the most eccentric orbit of all the planets in the Solar System. It has an eccentricity of 0.21. It ranges from 46,000,000 to 70,000,000 km (29,000,000 to 43,000,000 mi) away from the Sun. Mercury takes 87.969 Earth days to go around the Sun. Mercury's axial tilt is 0.027 degrees.
In the future, because Mercury's orbit's is very eccentric and Jupiter's huge gravity, its orbit may become unstable and the following things may happen:
It crashes into the Sun
It enters the Sun's Roche limit slowly and is torn apart
It crashes into Venus
It crashes into Earth
It is flung out of the Solar System and becomes a rogue planet
List of satellites sent to Mercury
Many man-made satellites have been sent to Mercury to study it. They are:
Mariner 10
The first spacecraft to visit Mercury was NASA's Mariner 10. It stayed in Mercury's orbit from 1974 to 1975. Mariner 10 took the first close-up pictures of Mercury's surface. It showed many features, such as the craters. Unfortunately, the same side of Mercury was day each time Mariner 10 flew close to Mercury. This made observing of both sides of Mercury impossible. In the end, less than 45% of the Mercury's surface was mapped.
Mariner 10 came close to Mercury three times. At the first time, it found a magnetic field, which surprised planetary geologists because Mercury's rotation was too slow to create a magnetic field. The second time was mainly used to take pictures of Mercury's surface. At the third time, it got more information about the magnetic field. It showed that the Mercury's magnetic field is like the Earth's magnetic field.
On March 24, 1975, eight days after its last close fly by, Mariner 10 ran out of fuel. Because its orbit could no longer be controlled, mission controllers shut down the probe . Mariner 10 is thought to still be orbiting the Sun.
MESSENGER
The second satellite to visit Mercury is NASA's MESSENGER. It stands for MErcury Surface, Space ENvironment, GEochemistry, and Ranging. It was launched on August 3, 2004. It made a fly-by of Earth in August 2005. It made another fly-by of Venus in October 2006. It made its first fly-by of Mercury happened on January 14, 2008, a second on October 6, 2008, and a third on September 29, 2009. It made a map of most of Mercury that Mariner 10 didn't map. The first image of Mercury orbiting the Sun was gotten on March 29, 2011.
MESSENGER was made to study Mercury's high density, the history of Mercury's geology, its magnetic field, the structure of its core, if it has ice at its poles, and where its thin atmosphere comes from. MESSENGER crashed into Mercury's surface on April 30, 2015.
Bepicolombo
The European Space Agency and the Japanese Space Agency made and launched a spacecraft called BepiColombo. It will orbit Mercury with two probes: one to map the planet and the other to study its magnetosphere. It was launched on October 20, 2018. BepiColombo is expected to reach Mercury in 2025. It will release the probe that will study the magnetosphere into an elliptical orbit. It will then release the probe the will make a map of Mercury into a circular orbit.
Related pages
List of planets
References
Other websites
SolarViews.Com
www.planetfacts.net |
515 | https://simple.wikipedia.org/wiki/Mars | Mars | Mars is the fourth planet from the Sun in the Solar System and the second-smallest planet. Mars is a terrestrial planet with polar ice caps of frozen water and carbon dioxide. It has the largest volcano in the Solar System, and some very large impact craters. Mars is named after the mythological Roman god of war because it appears of red color.
Space probes such as the Viking program landers are the main tools for the exploration of Mars.
Appearance
Mars is a terrestrial planet and made of rock. The ground there is red because of iron oxide (rust) in the rocks and dust. The planet's atmosphere is very thin. It is mostly carbon dioxide with some argon and nitrogen and tiny amounts of other gases including oxygen. The temperatures on Mars are colder than on Earth, because it is farther away from the Sun and has less air to keep heat in. There is water ice and frozen carbon dioxide at the north and south poles. Mars does not have any liquid water on the surface now, but signs of run-off on the surface were probably caused by water.
The average thickness of the planet's crust is about 50 km (31 mi), with a maximum thickness of 125 km (78 mi).
Moons
Mars has two small moons, called Phobos and Deimos.
The origin of Mars' moons is unknown and controversial. One theory is that the moons are captured asteroids. However, the moons' near circular orbits and low inclination relative to the Martian equator are not in agreement with the capture hypothesis.
Estimates of the mass ejected by a large Borealis-size impact vary. Simulations suggest that a body about 0.02 of Mars mass (~0.002 Earth mass) in size can produce a sizable debris disk in Martian orbit. Much of the material would stay close to Mars. There are several other large impact basins on Mars that could also have ejected enough debris to form the moons.
Physical geography
Lack of magnetic field
Mars does not have a global magnetic field. Despite this, observations show that parts of the planet's crust have been magnetized. This suggests that polarity reversals have occurred in the past. This paleomagnetism is similar to the magnetic striping found on Earth's ocean floors. One theory is that these bands suggest plate tectonic activity on Mars four billion years ago, before the planetary dynamo stopped working and the planet's magnetic field faded.
Rotation
A Martian day is called a sol, and is a little longer than an Earth day. Mars rotates in 24 hours and 37 minutes. It rotates on a tilted axis, just like the Earth does, so it has four different seasons. Of all the planets in the Solar System, the seasons of Mars are the most Earth-like, due to their similar axial tilt. The lengths of the Martian seasons are almost twice those of Earth's, as Mars's greater distance from the Sun leads to the Martian year being almost two Earth years long.
Martian surface temperatures vary from lows of about (at the winter polar caps) to highs of up to (in equatorial summer). The wide range in temperatures is due mostly to the thin atmosphere which cannot store much solar heat. The planet is also 1.52 times as far from the Sun as Earth, resulting in just 43% of the amount of sunlight.
Water
A 2015 report says Martian dark streaks on the surface were affected by water.
Liquid water cannot exist on the surface of Mars due to its low atmospheric pressure (there's not enough air to hold it in), except at the lowest elevations for short periods. The two polar ice caps appear to be made largely of frozen water. The amount of ice in the south polar ice cap, if melted, would be enough to cover the entire planet's surface 11 meters deep. A permafrost mantle stretches from the pole to latitudes of about 60°.
Geological evidence gathered by unmanned missions suggest that Mars once had much liquid water on its surface. In 2005, radar data revealed the presence of large quantities of water ice at the poles, and at mid-latitudes. The Mars rover Spirit sampled chemical compounds containing water molecules in March 2007. The Phoenix lander found water ice in shallow Martian soil in July 2008.
Landforms seen on Mars strongly suggest that liquid water at some time existed on the planet's surface. Huge areas of ground have been scraped and eroded.
Polar caps
Mars has two permanent polar ice caps. During a pole's winter, it lies in continuous darkness, chilling the surface and causing the deposition of 25–30% of the atmosphere into slabs of CO2 ice (dry ice). When the poles are again exposed to sunlight, the frozen CO2 sublimes (turns to vapor), creating enormous winds that sweep off the poles as fast as 400 km/h. Each season this moves large amounts of dust and water vapor, giving rise to Earth-like frost and large cirrus clouds and dust storms. Clouds of water-ice were photographed by the Opportunity rover in 2004.
The polar caps at both poles consist primarily of water ice.
Atmosphere
Mars has a very thin atmosphere with barely any oxygen (it is mostly carbon dioxide). Because there is an atmosphere, however thin it is, the sky does change colour when the sun rises and sets. The dust in the Martian atmosphere makes Martian sunsets somewhat blue. Mars's atmosphere is too thin to protect Mars from meteors, which is part of the reason why Mars has so many craters.
Meteorite craters
After the formation of the planets, all experienced the "Late Heavy Bombardment". About 60% of the surface of Mars shows a record of impacts from that era. Much of the remaining surface is probably lying over the immense impact basins caused by those events. There is evidence of an enormous impact basin in the northern hemisphere of Mars, spanning , or roughly four times larger than the largest impact basin previously known. This suggests that Mars was struck by a Pluto-sized body about four billion years ago. The event is thought to be the cause of the difference between the Martian hemispheres. It made the smooth Borealis Basin that covers 40% of the planet.
Some meteorites hit Mars with so much force a few pieces of Mars went flying into space even to Earth! Rocks on Earth are sometimes found which have chemicals that are exactly like the ones in Martian rocks. These rocks also look like they fell really quickly through the atmosphere, so it is reasonable to think they came from Mars.
Recent hits
Spacecraft Insight detected seismic waves made by the biggest meteorite impacts ever seen on Mars.
Geography
Mars is home to the highest known mountain in the Solar System, Olympus Mons. Olympus Mons is about 17 miles (or 27 kilometers) high. This is more than three times the height of Earth's tallest mountain, Mount Everest. It is also home to Valles Marineris, the third largest rift system (canyon) in the Solar System, 4,000 km long.
Observation of Mars
Our records of watching and recording Mars start with ancient Egyptian astronomers in the 2nd millennium BC.
Detailed observations of the location of Mars were made by Babylonian astronomers who developed methods using math to predict the future position of the planet. The ancient Greek philosophers and astronomers developed a model of the solar system with the Earth at the center ('geocentric'), instead of the sun. They used this model to explain the planet's motions. Vedic and Islamic astronomers estimated the size of Mars and its distance from Earth. Similar work was done by Chinese astronomers.
In the 16th century, Nicholas Copernicus proposed a model for the Solar System in which the planets follow circular orbits about the Sun. This 'heliocentric' model was the beginning of modern astronomy. It was revised by Johannes Kepler, who gave an elliptical orbit for Mars which better fit the data from our observations.
The first observations of Mars by telescope was by Galileo Galilei in 1610. Within a century, astronomers discovered distinct albedo features (changes in brightness) on the planet, including the dark patch and polar ice caps. They were able to find the planet's day (rotation period) and axial tilt.
Better telescopes developed early in the 19th century allowed permanent Martian albedo features to be mapped in detail. The first crude map of Mars was published in 1840, followed by better maps from 1877 onward. Astronomers mistakenly thought they had detected the spectroscopic mark of water in the Martian atmosphere, and the idea of life on Mars became popular among the public.
Yellow clouds on Mars have been observed since the 1870s, which were windblown sand or dust. During the 1920s, the range of Martian surface temperature was measured; it ranged from 85 to 7 oC. The planetary atmosphere was found to be arid with only traces of oxygen and water. In 1947, Gerard Kuiper showed that the thin Martian atmosphere contained extensive carbon dioxide; roughly double the quantity found in Earth's atmosphere. The first standard naming of Mars surface features was set in 1960 by the International Astronomical Union.
Since the 1960s, multiple robotic spacecraft and rovers have been sent to explore Mars from orbit and the surface. The planet has remained under observation by ground and space-based instruments across a broad range of the electromagnetic spectrum (visible light, infrared and others). The discovery of meteorites on Earth that came from Mars has allowed laboratory examination of the chemical conditions on the planet.
Martian 'canals'
During the 1877 opposition, Italian astronomer Giovanni Schiaparelli in Milan used a telescope to help produce the first detailed map of Mars. What caught people's attention was that the maps had features he called canali. These were later shown to be an optical illusion (not real). These canali were supposedly long straight lines on the surface of Mars to which he gave names of famous rivers on Earth. His term canali was popularly mistranslated in English as canals, and thought to be made by intelligent beings.
Other astronomers thought they could see the canals too, especially the American astronomer Percival Lowell who drew maps of an artificial network of canals on Mars.
Although these results were widely accepted, they were contested. Greek astronomer Eugène M. Antoniadi and English naturalist Alfred Russel Wallace were against the idea; Wallace was extremely outspoken. As bigger and better telescopes were used, fewer long, straight canali were observed. During an observation in 1909 by Flammarion with a telescope, irregular patterns were observed, but no canali were seen.
Life on Mars
Because Mars is the one of the closest planets to Earth in the Solar System, many have wondered if there is any kind of life on Mars. Today we know that the kind of life, if any, would be some simple bacteria-type organism.
Meteorites
NASA maintains a catalog of 34 Mars meteorites, that is, meteorites which originally came from Mars. These assets are highly valuable since they are the only physical samples available of Mars.
Studies at NASA's Johnson Space Center show that at least three of the meteorites contain possible evidence of past life on Mars, in the form of microscopic structures resembling fossilized bacteria (so-called biomorphs). Although the scientific evidence collected is reliable, and the rocks are correctly described, what made the rocks look like they do is not clear. To date, scientists are still trying to agree if it really is evidence of simple life on Mars.
Over the past few decades, scientists have agreed that when using meteorites from other planets found on Earth (or rocks brought back to Earth), various things are needed to be sure of life. Those things include:
Did the rock comes from the right time and place on the planet for life to exist?
Does the sample contain evidence of bacterial cells (does it show fossils of some kind, even if very tiny)?
Is there any evidence of biominerals? (minerals usually caused by living things)
Is there any evidence of isotopes typical of life?
Are the features part of the meteorite, and not contamination from Earth?
For people to agree on past life in a geologic sample, most or all of these things must be met. This has not happened yet, but investigations are still in progress. Reexaminations of the biomorphs found in the three Martian meteorites are underway.
The significance of water
Liquid water is necessary for life and metabolism, so if water was present on Mars, the chances of life evolving is improved. The Viking orbiters found evidence of possible river valleys in many areas, erosion and, in the southern hemisphere, branched streams. Since then, rovers and orbiters have also looked closely and eventually proved water was on the surface at one time, and is still found as ice in the polar ice caps and underground.
Today
So far, scientists have not found life on Mars, either living or extinct. Several space probes have gone to Mars to study it. Some have orbited (gone around) the planet, and some have landed on it. There are pictures of the surface of Mars that were sent back to Earth by the probes. Some people are interested in sending astronauts to visit Mars. They could do a better search, but getting astronauts there would be difficult and expensive. The astronauts would be in space for many years, and it could be very dangerous because of radiation from the sun. So far we have only sent unmanned probes.
The most recent probe to the planet is the Mars Science Laboratory. It landed on Aeolis Palus in Gale Crater on Mars on 6 August 2012. It brought with it a mobile explorer called 'Curiosity'. It is the most advanced space probe ever. Curiosity has dug up Martian soil and studied it in its laboratory. It has found sulfur, chlorine, and water molecules.
Popular culture
Some famous stories were written about this idea. The writers used the name "Martians" for intelligent beings from Mars. In 1898, H. G. Wells wrote The War of the Worlds, a famous novel about Martians attacking the Earth. In 1938, Orson Welles broadcast a radio version of this story in the United States, and many people thought it was really happening and were very afraid. Beginning in 1912, Edgar Rice Burroughs wrote several novels about adventures on Mars.
References
Notes
Other websites
Mars at Space Wiki
Mars at ESA/Hubble
Mars Profile by NASA's Solar System Exploration
Mars - http://space.about.com
NASA's Mars fact sheet
Mars Research News on https://www.sciencedaily.com
Planets - Mars A children's guide to Mars.
Mars - http://stevechallis.net
Canals of Mars
New Papers about Martian Geomorphology
Mars (planet) -Citizendium |
516 | https://simple.wikipedia.org/wiki/Classic%20Mac%20OS | Classic Mac OS | The Macintosh Operating System (Mac OS) is a program that allows a Macintosh computer to operate and be used. Mac OS was first made by Apple Inc. in 1984. In those days Mac OS was called Macintosh System Software – which was shortened to System or SSW (System Software). The term "Mac OS" first appeared in the splash screen for System 7.5.1, but was not adopted as the new name until the release of Mac OS 7.6.
Related pages
Apple Macintosh
References
Operating systems
MacOS |
517 | https://simple.wikipedia.org/wiki/Apple%20Macintosh | Apple Macintosh | The Apple Macintosh or just Mac is a line of personal computers made by the American company Apple Inc. The Macintosh was one of the first computers in which the people could use a mouse for pointing on a screen which had icons. This new way of working with a computer (interface) was known as graphical user interface. It was this feature of the Macintosh that made it so popular.
History
Processor history
The Apple–Intel transition was when Apple changed the CPU of Macintosh computers from PowerPC processors to Intel x86 processors. It was announced at the 2005 World Wide Developers Conference. Steve Jobs announced it.
Macintoshes were different than other personal computers for many years based on their central processor unit (CPU). At the start, Macs used Motorola 68000 chips instead of Intel chips. Later, Macs used PowerPC chips. In 2006, Macs started to use Intel chips. In 2020, Macs started to use Apple Silicon chips. Today, Macs are sold with Apple M1 chips.
Macintoshes
Software
The Mac does not have the Windows operating system installed on it. It has its own range of operating systems, known as macOS. The newest operating system is known as “Big Sur". Macs can run both Windows and macOS at the same time with help of a program called “Boot Camp”, which comes on every Mac.
In general, Macintosh computers cost more than other computers of the same speed.
Related pages
iMac
MacBook
MacBook Air
MacBook Pro
Other popular products of Apple include iPod, iPhone and iPad.
References
Macintosh |
518 | https://simple.wikipedia.org/wiki/Metre | Metre | A metre (US spelling, meter) is the basic unit of length in the SI measurement system. The symbol for the metre is m. The first meaning (in the French Revolution) was one ten-millionth of the distance between the Earth's equator and the North Pole along the Paris meridian. The metre is now defined as the distance light travels in a vacuum in 1/299,792,458 of a second.
In the imperial system of measurement, one yard is 0.9144 metres (after international agreement in 1959), so a metre is very near to 39.37 inches: about 3.281 feet, or 1.0936 yards.
Units multiples
0.000 000 000 000 000 000 000 001 Ym (yotametre) = 1 m
0.000 000 000 000 000 000 001 Zm (zetametre) = 1 m
0.000 000 000 000 000 001 Em (exametre) = 1 m
0.000 000 000 000 001 Pm (petametre) = 1 m
0.000 000 000 001 Tm (terametre) = 1 m
0.000 000 001 Gm (gigametre) = 1 m
0.000 001 Mm (megametre) = 1 m
0.001 km (kilometre) = 1 m
0.01 hm (hectometre) = 1 m
0.1 dam(decametre) = 1 m
1 m (metre)
10 dm (decimetres) = 1 m
100 cm (centimetres) = 1 m
1000 mm (millimetres) = 1 m
1 000 000 μm (micrometres) = 1 m
1 000 000 000 nm (nanometres) = 1 m
1 000 000 000 000 pm (picometres) = 1 m
1 000 000 000 000 000 fm (fermi or femtometres) = 1 m
1 000 000 000 000 000 000 am (attometres) = 1 m
1 000 000 000 000 000 000 000 zm (zeptometres) = 1 m
1 000 000 000 000 000 000 000 000 ym (yoctometres) = 1 m
Related pages
Metre Convention
References
SI units
Units of length |
519 | https://simple.wikipedia.org/wiki/Magnifying%20glass | Magnifying glass | A magnifying glass is a lens through which can be used to make things appear bigger, so you can see them better. It is used in many applications and manual operations, e.g., for examining postage stamps in philately.
The magnifying glass consists of a piece of convex-shaped glass or plastic. It has to be held at the right distance between the eye and the object for the object to be in focus. The magnifying glass usually comes with a handle. A telescope is a more advanced kind of magnifying glass and consists of at least two glass lenses.
A pair of binoculars is like a telescope for each eye. Spectacles or eyeglasses also use lenses to correct a person's vision.
Related pages
Binoculars
Stamp album
Telescope
References
Other websites
Tools
Philately |
520 | https://simple.wikipedia.org/wiki/Molecule | Molecule | A molecule is the smallest amount of a chemical substance that can exist. If a molecule were split into smaller pieces, it would be a different substance.
Molecules are made up of atoms that are stuck together in a particular shape or form. Not all combinations of atoms are equally possible; atoms make certain shapes in preference to others. Also, they have different valency. For example, oxygen atoms always have two bonds with other atoms, carbon atoms always have four bonds with other atoms, and nitrogen atoms always have three bonds with other atoms.
In the kinetic theory of gases, the term molecule is often used for any gaseous particle regardless of its composition. According to this definition, noble gas atoms are considered molecules as they are in fact monoatomic molecules.
In gases like air, the molecules are just flying around. In liquids like water, the molecules are stuck together but they can still move. In solids like sugar, the molecules can only vibrate. In the fourth state of matter known as plasma, the atoms are ionized and cannot form molecules.
With a molecular formula, you can write down the numbers of all atoms in a molecule. For example, the molecular formula of glucose is C6H12O6. That means that one molecule of glucose is made up of six carbon atoms, twelve hydrogen atoms and six oxygen atoms.
Bonding
For a molecule to exist, atoms have to stick together. This happens when two atoms share electrons. Instead of circling just one atom, the electron now circles around two. This is called a covalent bond. Sometimes, more than one electron is shared. The more electrons are shared, the stronger the bond gets and the stronger the atoms stick together.
Bonds can also be broken apart. Since most bonds require energy to form, they also give off energy when they are broken. But before most bonds break, the molecule has to be heated. Then the atoms start to move, and when they move too much, the bond breaks. Molecules that require less energy to break than they give off when broken are called fuels. For example, a candle will just sit there and nothing happens. But when you use a match to light it, it will burn for a long time. The match brings the energy to break the first bonds, which release enough energy to break the bonds below them, until the candle has burned down. There are also ionic bonds.
References
Other websites
Molecule of the Month - School of Chemistry, University of Bristol
Antibody Molecule - The National Health Museum
Data Book of Molecules - Home Page for Learning Environmental Chemistry
Chemistry |
522 | https://simple.wikipedia.org/wiki/Moral%20reasoning | Moral reasoning | Moral reasoning is a topic studied in psychology and in moral philosophy. It studies how people think about moral issues, problems, and questions. Psychologists who have studied it include Lawrence Kohlberg and Elliot Turiel. Kohlberg said that moral understanding develops in three main stages as a person gets older, but Turiel said that there are three domains of moral understanding that develop at the same time as a person gets older.
Moral philosophy, or ethics, is a major branch of philosophy. It is the study of value or quality. It covers the analysis and use of concepts such as right, wrong, good, evil, and responsibility.
ethics
psychology
philosophy |
524 | https://simple.wikipedia.org/wiki/Mosque | Mosque | A mosque is a place where Muslims worship. The word mosque comes from the Arabic word masjid. A larger, 'collective', mosque is called a masjid jāmi. Larger mosques offer more services to their community.
For many Muslim people, a mosque is more than a place of worship. Muslims worship, study and discuss Islam, and do many other things in a mosque and its compounds. In the United Kingdom, many mosques are used as community centres. They are also used to teach about Islam. Religious festivals and gatherings are held in mosques. Weddings are one example. Mosques have rules to control what people do inside. One of these is that it is disrespectful to disturb another person who is worshipping.
Many mosques are known for their Islamic architecture. The earliest mosques, opened in 7th century were open-air spaces. They are the Quba Mosque and Masjid al-Nabawi. Later Mosques were buildings that were specially designed. Nowadays, mosques are in every continent, except Antarctica.
Architecture
Many mosques are famous works of architecture. They are often built in a style that has stayed the same for many centuries. Many mosques have prayer halls, domes, and minarets. They may also have a courtyard. Mosques are often built with patterned walls.
Mosques were first built on the Arabian Peninsula. The Muslims who built them used old architectural styles. They also combined these styles in new ways. A major influence was the palaces built during the Parthian and Sassanid dynasties of Persia. The Sarvestan palace from the Sassanid era is a good example of this. It has an arched entrance and a central dome. These features already existed in Persia before Islam.
After the Arab invasion of Persia, the new style, with its Sassanid influence, was used for the new Islamic world. Many forms of mosques have developed in different regions of the Islamic world. Important mosque types include the early Abbasid mosques, T-type mosques, and the central-dome mosques of Anatolia. In the 20th century, many countries that grew rich from oil paid for the building of many new mosques. The rulers of these countries often hired leading architects to design these mosques. They included non-Muslims.
Arab plan
Many early mosques have a square or rectangular plan. They also have a prayer hall and an enclosed courtyard. This is known as Arab-plan. The first mosques of this type were built during the Umayyad Dynasty.
The flat roof of the prayer hall was supported by columns. Many rows of columns were needed to support such roofs; this is called "hypostyle architecture". One of the most famous hypostyle mosques is the Mezquita de Córdoba in Spain. It is supported by over 850 columns.
In the warm Mediterranean and Middle Eastern climates, the courtyard served to hold the large number of worshippers during Friday prayers. Often, hypostyle mosques have outer arcades. They allow the visitors to enjoy the shade. Arab-plan mosques were built mostly during the Umayyad and Abbasid dynasties. The Arab plan was very simple, which did not allow for much further development. This caused that style of mosque to fall out of favour.
Central dome
The Ottomans began building central dome mosques in the fifteenth century. These mosques have a large dome centered over the prayer hall. There may also be smaller domes, which are off-center over the prayer hall or the rest of the mosque. This style was heavily influenced by the Byzantine religious architecture with its use of central domes.
Iwan
Iwan mosques are famous for their domed rooms and iwans. Iwans are spaces with an arched roof. They have an opening at one end. One or more iwans face a central courtyard that serves as the prayer hall. The style borrows from pre-Islamic Iranian architecture. Most mosques with this style are in Iran.
Parts of Mosques
Minarets
Most mosques have minarets. Minarets are tall towers. Usually they are at one of the corners of the mosque. The top of the minaret is the highest point in the mosque, and usually the highest point in the area around the mosque. The tallest minaret in the world is in the Hassan II Mosque in Casablanca, Morocco.
The first mosques had no minarets. The most conservative Islamic groups, like Wahhabis, still avoid building minarets. They see them as simply a fancy decoration and unnecessary. The first minaret was built in 665 in Basra during the reign of the Umayyad caliph Muawiyah I. Muawiyah encouraged the building of minarets, as they were supposed to be the same as bell towers on Christian churches. Because of this, mosque architects used the shape of the bell tower for their minarets. Both the minaret and the bell tower serve the same purpose — to call the faithful to prayer.
Before the five required daily prayers, a muezzin calls the worshippers to prayer from the minaret. In many countries like Singapore where Muslims are not the majority, mosques are stopped from loudly playing the call to prayer. The main problem is the use of electronic amplification of the call, which is now widely used by mosques.
Domes
The domes were often placed directly above the main prayer hall. They represent the universe that Allah created. At first, these domes were small. They only took up a small part of the roof near the mihrab. Later, they took the whole roof above the prayer hall.
Domes normally have the shape of a hemisphere. The Mughals in India popularized onion-shaped domes in South Asia and Persia. Some mosques have several domes, as well as the main large dome. The other domes are often smaller.
Domes would help the imam be heard, as the sound waves would bounce in and then out of the dome making the voice louder.
Prayer hall
All mosques have a prayer hall, which is also called musalla. Normally, there is no furniture in it except for prayer mats or rugs. These are necessary, as Islamic prayer is usually done kneeling.
Some mosques have Arabic calligraphy and Qur'anic verses on the walls to help worshipers focus on the beauty of Islam and its holiest book, the Qur'an, as well as for decoration.
The qiblah wall is usually at the other side of the entrance to the prayer hall. This wall is specially decorated. In a properly sited mosque, it will be set perpendicular to a line leading to Mecca. People pray in rows parallel to the qiblah wall. They arrange themselves so they face Mecca. In the qiblah wall, usually at its center, is the mihrab, a niche or depression showing the direction of Mecca. The mihrab serves as the place where the imam leads the five daily prayers.
Washing (wudhu)
All people must wash themselves before they pray. Mosques often have fountains or other facilities for washing in their entrances or courtyards, so that people can perform the washing ritual before prayer.
At very small mosques, worshippers may use restrooms for their ritual washing, or wu'du. In traditional mosques, there is often a building specially for washing. This is often in the center of the courtyard. In the prayer halls, people must not wear shoes for much the same reason.
Modern features
Modern mosques should appeal to the community they serve. For this reason, other facilities may also be available at the mosque, like health clinics, libraries, and sports halls.
The inside of mosques
There may be decorative tiles, plaster or coloured mosaics on the walls. There are no pictures or statues.
Religious functions
Prayers
Adult Muslims are expected to pray five times a day. Most mosques have formal prayers for each of these times. If performing the prayer is difficult, for example for ill people, then exceptions are made.
Mosques also hold a special prayer service, called jumuah. This is done once a week. It is a form of Sabbath and replaces the Friday prayers at the mosque. Daily prayers can be done anywhere. However, Muslims are expected to do their Friday prayer at the mosque.
When a Muslim dies, a funeral prayer is normally held. It is held outdoors in a courtyard or square close to the mosque. The prayers have all the worshippers present, including the imam, taking part. During eclipses, mosques will host special prayers called eclipse prayers.
There are two large holidays (Eids) in the Islamic calendar. During these days, there are special prayers at mosques in the morning. Larger mosques will normally hold them for their own communities as well as the people from smaller local mosques. Mosques, especially those in countries where Muslims are the majority, will also host Eid prayers outside in courtyards or town squares.
Ramadan events
There are many events in Ramadan, Islam's holiest month. During Ramadan, Muslims must fast during the day. Mosques organise iftar dinners after sunset. These are done after the fourth required prayer of the day. Part of the food is given by members of the community, which creates nightly potluck dinners. The community contribution to these dinners is required. For this reason, mosques with smaller communities may not be able to hold the iftar dinners daily.
Some mosques will also hold meals in the morning before dawn. Mosques will often invite poorer members of the community to these meals. Islam sees giving charity during Ramadan as good acts.
Larger mosques sometimes offer special, optional prayers. They are done after the last required prayer of the day. During each night of prayers, one member of the community who has memorized the entire Qur’an will recite a part of the book. It can last for up to two hours. Sometimes, several such people (not necessarily of the local community) take turns to do this. During the last ten days of Ramadan, larger mosques will host all-night programs to observe Laylat al-Qadr. It is the night Muslims believe that the Islamic prophet Muhammad first received Qur'anic revelations. On that night, between sunset and sunrise, mosques employ speakers to teach the worshipers about Islam. Mosques or the community usually provide meals at times through the night.
Political functions
During the late twentieth century, more and more mosques have been used for political purposes. Modern-day mosques in the Western world want to educate good citizens. The details differ greatly from mosque to mosque and from country to country.
Advocacy
Countries with small Muslim populations use mosques as a way to support civic participation. They are more likely to do this than Muslim-majority countries of the Greater Middle East. American mosques host voter registration and civic participation drives. In the United States, Muslims are often immigrants, or the children of immigrants. Mosques want to interest these people for politics. They also want to keep them informed about issues that concern the Muslim community. People who attend the services at the mosque regularly are more likely to take part in protests, to sign petitions, and to involve themselves in political matters.
A link between political views and mosque attendance can still be seen in other parts of the world. After the al-Askari Mosque bombing in February 2006, imams and other Islamic leaders used mosques and Friday prayers to call for calm and peace during the widespread violence.
Beginning in the late twentieth century and continuing into the early twenty-first century, a small number of mosques have also become a base for extremist imams to support terrorism and extreme Islamic ideals. Finsbury Park Mosque in London is a mosque that has been used in this manner.
Social conflict
Like other places of worship, mosques can be at the center of social conflicts.
Babri Mosque was the centre of such a conflict up until the early 1990s when it was demolished. Before a solution could be found, the mosque was destroyed by about 200,000 Hindus. It took place on 6 December 1992. The mosque was built by Babur to mark the birthplace of Ram. It was believed to be on a site of an earlier Hindu temple. The conflict over the mosque was directly linked to rioting in Bombay (present-day Mumbai) as well as bombings in 1993 that killed 257 people.
In February 2006, a bombing seriously damaged Iraq's al-Askari Mosque. This increased the existing tensions. The conflict between two Muslim groups in Iraq had already led to other bombings. However mosque bombings are not limited to Iraq. In June 2005, a suicide bomber killed at least 19 people at an Afghan mosque. In April 2006, there were two explosions at India's Jama Masjid.
After the September 11 attacks, several American mosques were targets of attacks. These ranged from simple vandalism to arson.
The Jewish Defense League was suspected of plotting to bomb the King Fahd Mosque in Culver City, California. There were similar attacks in the United Kingdom after the 7 July 2005 London bombings. Outside the Western world, in June 2001, the Hassan Bek Mosque was the target of attacks. The attacks involved hundreds of Israelis angry at Arabs for a previous attack.
Saudi influence
Saudi involvement in building mosques around the world only goes back to the 1960s.
In the 1980s, the Saudi Arabian government began to pay for the building of mosques in countries around the world. An estimated US$45 billion has been spent by the Saudi Arabian government for mosques and Islamic schools in foreign countries. Ain al-Yaqeen, a Saudi newspaper, reported in 2002 that Saudi money may have helped to build as many as 1,500 mosques and 2,000 other Islamic centers. Saudi citizens have also given a lot of money to mosques in the Islamic world, especially in countries where they see Muslims as poor and oppressed. Following the fall of the Soviet Union, in 1992, mosques in Afghanistan received money from Saudi citizens. The King Fahd Mosque in Culver City, California and the Islamic Cultural Center of Italy in Rome are two of Saudi Arabia's largest investments in foreign mosques as former Saudi king Fahd bin Abdul Aziz al-Saud gave US$8 million and US$50 million to the two mosques, respectively.
Rules and behaviour in mosques
In a mosque, people should keep focused on worshiping Allah. For this reason, there are a number of rules about the correct behaviour in a mosque. Some of these rules are the same all over the world, such as no shoes should be worn in the prayer hall. Other rules are different from mosque to mosque.
Prayer leader
It is generally seen as good to have someone who leads the prayers, though this is not strictly necessary. The person who usually leads the prayers is called imam. He must be a free and honest man. He should also be an authority when it comes to answering questions on religion. In mosques that were built or that are kept up by the government, the imam is selected by the ruler. In private mosques, the community selects the imam, through majority voting.
Only men may lead prayers for men. Women are allowed to lead prayers for congregations where there are only women.
Attending a mosque
In addition to washing, there are other rules that also apply to those who enter the mosque, even if they do not wish to pray there. It is forbidden to wear shoes in the carpeted area of the prayer hall. Some mosques also do not allow wearing shoes in other parts, even though these may not be devoted to praying.
Islam requires that its believers wear clothes that show modesty. As a result, both men and women must follow this rule when they attend a mosque (though mosques may not always enforce the rules). Men are supposed to come to the mosque wearing loose and clean clothes that do not show the shape of the body. Similarly, women who come to the mosque are expected to wear loose clothing, shirts, pants that cover to the wrists and ankles and cover their heads such as with a hijab. Many Muslims, regardless of their ethnic background, wear Middle eastern clothing associated with Arabic Islam to special occasions and prayers at mosques.
Mosques are places of worship. For this reason, those inside the mosque should be respectful to those who are praying. Loud talking or discussion of topics that could be disrespectful, is forbidden in areas where people are praying. It is also considered as rude to walk in front of Muslims in prayer or otherwise disturb them.
Men and women pray in different parts
Islamic law requires men and women to be separated in the prayer hall. Ideally, women should pray behind men. The second caliph Umar at one time stopped women from attending mosques, especially at night, because he feared they may be teased by males, so he made them to pray at home. Sometimes a special part of the mosque was railed off for women; for example, the governor of Mecca in 870 had ropes tied between the columns to make a separate place for women.
Many mosques today will put the women behind a barrier or partition or in another room. Mosques in South and Southeast Asia put men and women in separate rooms, as the divisions were built into them centuries ago. In nearly two-thirds of American mosques, women pray behind partitions or in separate areas, not in the main prayer hall; some mosques do not admit women at all. Although there are sections only for women and children, the Grand Mosque in Mecca is desegregated.
Non-Muslims in mosques
A few scholars of Islamic law believe that non-Muslims may be allowed into mosques, as long as they do not sleep or eat there. Followers of the Maliki school of Islamic jurisprudence disagree. They say that non-Muslims may not be allowed into mosques at all.
Different countries have different opinions on the question. Nearly all the mosques in the Arabian Peninsula as well as Morocco do not allow non-Muslims. The Hassan II Mosque in Casablanca is one of only two mosques in Morocco currently open to non-Muslims.
In modern-day Saudi Arabia, the Grand Mosque and all of Mecca are open only to Muslims. Likewise, the Masjid al-Nabawi and the city of Medina that surrounds it are also off-limits to those who do not practice Islam. For mosques in other areas, it has most commonly been taken that non-Muslims may only enter mosques if granted permission to do so by Muslims and if they have a proper reason.
In modern Turkey non-Muslim tourists are allowed to enter any mosque, but must obey the rules of decorum. Visiting a mosque is allowed only between prayers; visitors must wear long trousers and take off their shoes; women must cover their heads; no photos; no loud talk is allowed. No references to other religions are allowed (no crosses on necklaces, no cross gestures etc.).
However, there are also many other places in the west as well as the Islamic world where non-Muslims are welcome to enter mosques. Most mosques in the United States, for example, report receiving non-Muslim visitors every month. Many Mosques throughout the United States welcome non-Muslims as a sign of openness to the rest of the community and to encourage conversions to Islam.
Dogs
Dogs are usually banned from entering mosques, but on 24 September 2008, the Muslim Law Council UK made special ruling, called a fatwa, which granted a blind Muslim permission to take his guide dog into the mosque.
Mosques as hostels
It is common for a smaller mosque to serve as a hostel for Muslims on haj (pilgrimage to Mecca). Sometimes mosques are used for refugees, or as temporary homes for homeless people. Obligations to neighbours in Islam are very strict, and specific. In the Qur'an Mohammed said that a person who helps others in the hour of need, and who helps the oppressed; that person God will help on the Day of Travail (agony). There are other commands, such as helping the poor and being nice to people. An important part of being Muslim, or just being part of the mosque, is taking care of people who need help. A mosque is a social, as well as a religious, group.
A madrassa is a little different from a mosque. A madrassa focuses on teaching Islam, usually to children and young people.
Mosques in Spain
When Spain was under Muslim control, some of the most beautiful buildings were mosques. After 1491, Spain was under Christian control. However, the Christians did not tear down the mosques. They simply put a crucifix in them to make them into churches. These mosques influenced the Renaissance architecture (way of building) in Europe.
References |
525 | https://simple.wikipedia.org/wiki/Mammal | Mammal | Mammals are animals which form the class Mammalia (from Latin , 'breast'). They are a group of vertebrate animals. They have fur or hair and a very precise kind of temperature regulation.
With the exception of the monotremes, all mammals bear live young. Unlike other vertebrates, they are the only animals that produce milk for their young through their mammary glands. Parental care of the young is universal among mammals, sometimes for extended periods.
Mammals became the dominant land animals after non-bird dinosaurs were eliminated. Recent work helped to explain their success: epigenetics seems to have started in early mammals.
Main characteristics
Reproductive cycle
Most marsupial and eutherian mammals have a reproductive cycle known as the oestrous cycle (U.S: estrous cycle). Females are sexually active only during the oestrous stage, when they are 'on heat' for a few days each month. If an ovum is not fertilized, the endometrium (uterus lining) is resorbed. Oestrus cycles may occur once or twice a year, or many times a year. Each group of mammals has its own frequency.
Humans and primates, are quite different. They have a menstrual cycle. In this case, females are sexually receptive at any time, but only fertile when an ovum is released from an ovary. In this case, the endometrium (if not needed for an fertilised egg) is discarded. The endometrium is shed, and takes with it a certain amount of blood. In this system, eggs are released from the ovaries mostly in the middle of the cycle, away from the menstrual period. This ovulation is 'concealed', meaning, it is not obvious when it occurs. This process, so it is thought, tends to keep the male and female together, which is unusual in mammals with the oestrous cycle. Keeping males and females together is related to the long learning period of primates.
Skeleton
One diagnostic feature of mammals is the lower jaw. Unlike earlier forms, it is a single bone, the dentary. This is one feature which can be seen in fossils, or at least those which are complete enough to have the lower jaw. Another diagnostic feature is the ear ossicles. Mammals have three little bones in their inner ear. These ear ossicles are bones which were, long ago, part of the lower jaw in early proto-mammals.
There are quite a number of other features in the skull and limbs, so that it is usually possible to identify and describe a mammal from its skeleton alone, or even a partial skeleton.
Neocortex and behavior
Another diagnostic feature is the neocortex of the brain, which no other vertebrate has. This is involved in the kind of flexible behavior and learning typical of mammals. Reptiles and birds have much of their behavior controlled by "inherited behavior chains", which roughly translates as "instincts". Almost all animals can do some learning, but mammals do far more than other vertebrates. Their behavior is much more flexible than lizards, for example, and that is made possible by their neocortex.
Other things in the life of mammals seem to be connected with this flexibility and learning. Play is a kind of early learning period in which, according to one theory, mammals develop skills which they will need in life. All mammalian young play, and this is very obvious in the more intelligent mammals (primates, cats).
The emotions of mammals are very noticeable, and rather similar to ours. It is possible, and quite common, for humans to have a friendly relationship with another mammal. It is quite impossible for a human to have any kind of relationship with a snake or a gecko (for example). This is because the reptile simply does not have the same basic emotions as a human.
Other items
There are about 50 characters which are typical of mammals: some of the most important are discussed above. A few more examples will make it clear that mammals are very different from reptiles and birds:
Sweat glands
Tooth replacement: two sets, and no continuous replacement. Enamel on the tooth surface. Reptile teeth are all alike (apart from size); mammal teeth follow a set pattern (starting at the front): incisors, canines, premolars and molars.
Occipital condyles. Two knobs at the base of the skull fit into the topmost neck vertebra; most tetrapods have only one such knob.
With the exception of the five monotreme species, all other mammals have an outlet for food waste which is separate from the urinogenital outlet. Monotremes, reptiles and birds have a common cloaca at the rear.
Mammals excrete urea; reptiles and birds excrete uric acid.
Colour vision is defective or absent in almost all mammals. Primates are the exception, but we know their colour vision re-evolved from ancestors which lacked it.
In reptiles and birds the blood vessel which carries oxygenated blood from the left ventricle of the heart is on the right side of the body; but in mammals it is on the left side.
There are many features of the skeleton that mammals share:
Their neck almost always has seven vertebrae, no matter how long it is.
Their lower jaw is made of just a single bone on each side, the dentary.
Their inner ear has three tiny bones, the ossicles: malleus, incus and stapes.
In the language of cladistics, the 50 unique characters are apomorphies which prove that mammals are a clade descended from a common ancestor.
Main groups
All mammals feed milk to their young, and protect and look after them.
The vast majority of mammal species give birth to live young, these are the placental mammals, most of which are classified as Eutheria and a small number are classified as marsupials.
Marsupials are mammals with pouches to carry young in, like the kangaroo.
There are only five species (the monotreme mammals) that lay eggs, the duck-billed platypus Ornithorhynchus, and four species of spiny anteater Echidna. The monotremes are confined to Australia and New Guinea, and are the sole survivors of an earlier group of mammals.
Modes of life
By number of species, mammals (with 5488 species), are not the most successful vertebrates. Birds, with about 10,000 species have nearly twice as many, and reptiles have just as many as birds. Fish have even more species. There are 27,000 species of fish, of which nearly 26,000 are bony fish.
Despite this, many zoologists do regard mammals as a successful group of animals. One reason is that they are successful in all habitats on Earth. In the air, in the water, in forests, in the colder regions of the world, and above all on grasslands, where they are outstandingly successful.
In the air, the bats (Chiroptera) are the mammalian order with the most species. They 'own' the nighttime, since birds are largely diurnal (daytime) animals. Bats are hugely successful, mostly as nighttime predators of insects.
Seagoing mammals, the Cetacea and the pinnipeds, are very successful and significant predators. This includes the whales, seals, walrus, dolphins and others.
The terrestrial mammals are fewer in number of species than lizards, but they are huge in individual numbers, and far more important in the life of the terrestrial biomes. Their ability to move from place to place and adapt has made them a most effective group. Many mammals live in cold places. These mammals have thick hair or blubber to keep them warm. Others may live in rainforests. On land the rodents (rats, mice) are hugely successful, more common in numbers than any other mammals. Large mammals on land have been hunted to extinction in some parts of the world, but the ones which remain are now better protected.
Last, but certainly not least, are the primates. Their natural habitat, with few exceptions, are the forests. Most live in the trees, with hands that grasp, good colour vision, and intelligence. In the Pliocene period some moved out onto the savannas as grassland replaced forests. Mankind is the result of this shift into the savannas.
Taxonomy
The evolutionary relationships among land vertebrates is as follows:
Tetrapoda (land vertebrates)
Amphibia (lay eggs in water)
Amniota (lay cleidoic eggs)
Sauropsida (all true 'reptiles')
Synapsida (all 'mammal-like amniotes')
Pelycosauria
Therapsida (in particular, the Cynodontia)
Mammalia (bear live young; milk; raise their young etc.)
This sort of classification is not traditional, but it does reflect our knowledge of palaeontology and evolution.
Standardized textbook classification
A somewhat standardized classification system has been adopted by most current mammalogy classroom textbooks. It is based on living animals. The following taxonomy of extant and recently extinct mammals is from Vaughan et al. 2000.
Class Mammalia
Subclass Prototheria: monotremes: platypuses and echidnas
Subclass Theria: live-bearing mammals
Infraclass Metatheria: marsupials
Infraclass Eutheria: placentals
List of living orders
Mammals can be divided in a number of orders:
Monotremes (monotremata)
Marsupials (marsupialia)
Eutheria
Superorder Xenarthra
Order Pilosa
Order Cingulata
Superorder Afrotheria
Order Proboscidea
Superorder Laurasiatheria
Insectivora (no longer used)
Order Eulipotyphla
Order Chiroptera
Order Carnivora
Order Perissodactyla
Order Artiodactyla
Order Cetacea
Superorder Euarchontoglires
Order Rodentia
Order Lagomorpha
Order Primates
Debate on the meaning of "mammalia"
Because two quite different dates are given in the taxobox, an explanation is needed. Rowe defines mammals as "the taxon originating with the most recent common ancestor of extant (living) Monotremata and Theria". That puts the emphasis heavily on living mammals, where, as Rowe points out, the database of characters is extensive.
Kemp explains the problem with that approach: "If the definition of a mammal is based rigorously upon possession of all the characters of living mammals, then some fossil forms that are extremely mammalian in anatomy... are excluded".
"An altogether different perspective on defining Mammalia is based on traditional palaeobiological practice. An arbitrary decision is made about which characters to select as defining characters... Characters deemed appropriate are those reflecting the... fundamental mammalian biology. The essence of mammalian life is to be found in their endothermic temperature physiology, greatly enlarged brain, dentition capable of chewing food, highly agile, energetic locomotion, and so on. The organisms that achieved this grade of overall organisation are deemed to be Mammalia... Around the end of the Triassic period, about 205 mya, a number of fossils are found of very small animals that have [most] of the skeletal characters of modern mammals".
This difference in outlook explains the difference in the two dates given in the taxobox.
Gallery
Related pages
Mammalia (taxonomy)
References |
528 | https://simple.wikipedia.org/wiki/Number | Number | A number is a concept from mathematics, used to count or measure. Depending on the field of mathematics, where numbers are used, there are different definitions:
People use symbols to represent numbers; they call them numerals. Common places where numerals are used are for labeling, as in telephone numbers, for ordering, as in serial numbers, or to put a unique identifier, as in an ISBN, a unique number that can identify a book.
Cardinal numbers are used to measure how many items are in a set. For example, {A,B,C} has size "3".
Ordinal numbers are used to specify a certain element in a set or sequence (first, second, third).
Numbers are also used for other things like counting. Numbers are used when things are measured. Numbers are used to study how the world works. Mathematics is a way to use numbers to learn about the world and make things. The study of the rules of the natural world is called science. The work that uses numbers to make things is called engineering.
Numbering methods
Numbers for people
There are different ways of giving symbols to numbers. These methods are called number systems. The most common number system that people use is the base ten number system. The base ten number system is also called the decimal number system. The base ten number system is common because people have ten fingers and ten toes. There are 10 different symbols (0, 1, 2, 3, 4, 5, 6, 7, 8, and 9) used in the base ten number system. These ten symbols are called digits.
A symbol for a number is made up of these ten digits. The position of the digits shows how big the number is. For example, the number 23 in the decimal number system really means (2 times 10) plus 3. Similarly, 101 means 1 times a hundred (=100) plus 0 times 10 (=0) plus 1 times 1 (=1).
Numbers for machines
Another number system is more common for machines. The machine number system is called the binary number system. The binary number system is also called the base two number system. There are two different symbols (0 and 1) used in the base two number system. These two symbols are called bits.
A symbol for a binary number is made up of these two bit symbols. The position of the bit symbols shows how big the number is. For example, the number 10 in the binary number system really means 1 times 2 plus 0, and 101 means 1 times four (=4) plus 0 times two (=0) plus 1 times 1 (=1). The binary number 10 is the same as the decimal number 2. The binary number 101 is the same as the decimal number 5.
Names of numbers
English has special names for some of the numbers in the decimal number system that are "powers of ten". All of these power of ten numbers in the decimal number system use just the symbol "1" and the symbol "0". For example, ten tens is the same as ten times ten, or one hundred. In symbols, this is "10 × 10 = 100". Also, ten hundreds is the same as ten times one hundred, or one thousand. In symbols, this is "10 × 100 = 10 × 10 × 10 = 1000". Some other powers of ten also have special names:
1 – one
10 – ten
100 – one hundred
1,000 – one thousand
1,000,000 – one million
When dealing with larger numbers than this, there are two different ways of naming the numbers in English. Under the "long scale", a new name is given every time the number is a million times larger than the last named number. It is also called the "British Standard". This scale used to be common in Britain, but is not often used in English-speaking countries today. It is still used in some other European nations.
Another scale is the "short scale", under which a new name is given every time a number is a thousand times larger than the last named number. This scale is a lot more common in most English-speaking nations today.
1,000,000,000 – one billion (short scale), one milliard (long scale)
1,000,000,000,000 – one trillion (short scale), one billion (long scale)
1,000,000,000,000,000 – one quadrillion (short scale), one billiard (long scale)
Types of numbers
Natural numbers
Natural numbers are the numbers which we normally use for counting: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, etc. Some people say that 0 is a natural number, too. The set of all natural numbers is written as .
Another name for these numbers is positive numbers. These numbers are sometimes written as +1 to show that they are different from the negative numbers. But not all positive numbers are natural (for example, is positive, but not natural).
If 0 is called a natural number, then the natural numbers are the same as the whole numbers. If 0 is not called a natural number, then the natural numbers are the same as the counting numbers. So if the words "natural numbers" are not used, then there will be less confusion about whether zero is included or not. But unfortunately, some say that zero is not a whole number, while others say that whole numbers can be negative. "Positive integers" and "non-negative integers" are another way to include zero or exclude zero, but only if people know those words.
Negative numbers
Negative numbers are numbers less than zero.
One way to think of negative numbers is to use a number line. We call one point on this line zero. Then we will label (write the name of) every position on the line by how far to the right of the zero point is. For example, the point one is one centimeter to the right, and the point two is two centimeters to the right.
However, the point one centimeter to the left of the zero point cannot be point one, since there is already a point called one. We therefore call this point minus one (−1, as it is one centimeter away but in the opposite direction).
A drawing of a number line is below.
All the normal operations of mathematics can be done with negative numbers:
Adding a negative number to another is the same as taking away the positive number with the same numerals. For example, 5 + (−3) is the same as 5 − 3, and equals 2.
Taking away a negative number from another is the same as adding the positive number with the same numerals. For example, 5 − (−3) is the same as 5 + 3, and equals 8.
Multiplying two negative numbers together produces a positive number. For example, −5 times −3 is 15.
Multiplying a negative number by a positive number, or multiply a positive number by a negative number, produces a negative result. For example, 5 times −3 is −15.
Since finding the square root of a negative number is impossible for real numbers (as negative times negative equals positive for real numbers), the square root of -1 is given a special name: i. This is also called the imaginary unit.
Integers
Integers are all the natural numbers, all their opposites, and the number zero. Decimal numbers and fractions are not integers.
Rational numbers
Rational numbers are numbers which can be written as fractions. This means that they can be written as a divided by b, where the numbers a and b are integers, and b is not zero.
Some rational numbers, such as 1/10, need a finite number of digits after the decimal point to write them in decimal form. The number one tenth is written in decimal form as 0.1. Numbers written with a finite decimal form are rational. Some rational numbers, such as 1/11, need an infinite number of digits after the decimal point to write them in decimal form. There is a repeating pattern to the digits following the decimal point. The number one eleventh is written in decimal form as 0.0909090909 ... .
A percentage could be called a rational number, because a percentage like 7% can be written as the fraction 7/100. It can also be written as the decimal 0.07. Sometimes, a ratio is considered as a rational number.
Irrational numbers
Irrational numbers are numbers which cannot be written as a fraction, but do not have imaginary parts (explained later).
Irrational numbers often occur in geometry. For example, if we have a square which has sides of 1 meter, the distance between opposite corners is the square root of two, which equals 1.414213 ... . This is an irrational number. Mathematicians have proved that the square root of every natural number is either an integer or an irrational number.
One well-known irrational number is pi. This is the circumference (distance around) of a circle divided by its diameter (distance across). This number is the same for every circle. The number pi is approximately 3.1415926535 ... .
An irrational number cannot be fully written down in decimal form. It would have an infinite number of digits after the decimal point, and unlike 0.333333 ..., these digits would not repeat forever.
Real numbers
Real numbers is a name for all the sets of numbers listed above:
The rational numbers, including integers
The irrational numbers
The real numbers form the real line. This is all the numbers that do not involve imaginary numbers.
Imaginary numbers
Imaginary numbers are formed by real numbers multiplied by the number i. This number is the square root of minus one (−1).
There is no number in the real numbers which when squared, makes the number −1. Therefore, mathematicians invented a number. They called this number i, or the imaginary unit.
Imaginary numbers operate under the same rules as real numbers:
The sum of two imaginary numbers is found by pulling out (factoring out) the i. For example, 2i + 3i = (2 + 3)i = 5i.
The difference of two imaginary numbers is found similarly. For example, 5i − 3i = (5 − 3)i = 2i.
When multiplying two imaginary numbers, remember that i × i (i2) is −1. For example, 5i × 3i = ( 5 × 3 ) × ( i × i ) = 15 × (−1) = −15.
Imaginary numbers were called imaginary because when they were first found, many mathematicians did not think they existed. The person who discovered imaginary numbers was Gerolamo Cardano in the 1500s. The first to use the words imaginary number was René Descartes. The first people to use these numbers were Leonard Euler and Carl Friedrich Gauss. Both lived in the 18th century.
Complex numbers
Complex numbers are numbers which have two parts; a real part and an imaginary part. Every type of number written above is also a complex number.
Complex numbers are a more general form of numbers. The complex numbers can be drawn on a number plane. This is composed of a real number line, and an imaginary number line.
3i|_
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2i|_ . 2+2i
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i|_
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|_|_|_|_|_|_|_|_|
−2 −1 0 1 2 3 4 5 6
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−i|_ .3−i
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.−2−2i −2i|_
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−3i|_
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All of normal mathematics can be done with complex numbers:
To add two complex numbers, add the real and imaginary parts separately. For example, (2 + 3i) + (3 + 2i) = (2 + 3) + (3 + 2)i= 5 + 5i.
To subtract one complex number from another, subtract the real and imaginary parts separately. For example, (7 + 5i) − (3 + 3i) = (7 − 3) + (5 − 3)i = 4 + 2i.
To multiply two complex numbers is more complicated. It is easiest to describe in general terms, with two complex numbers a + bi and c + di.
For example, (4 + 5i) × (3 + 2i) = (4 × 3 − 5 × 2) + (4 × 2 + 5 × 3)i = (12 − 10) + (8 + 15)i = 2 + 23i.
Transcendental numbers
A real or complex number is called a transcendental number if it can not be obtained as a result of an algebraic equation with integer coefficients.
Proving that a certain number is transcendental can be extremely difficult. Each transcendental number is also an irrational number. The first people to see that there were transcendental numbers were Gottfried Wilhelm Leibniz and Leonhard Euler. The first to actually prove there were transcendental numbers was Joseph Liouville. He did this in 1844.
Some well-known transcendental numbers include:
e
π
ea for algebraic a ≠ 0
Related pages
Names of numbers in English
Notes
Basic English 850 words |
530 | https://simple.wikipedia.org/wiki/November | November | November (Nov.) is the eleventh month of the year in the Gregorian calendar, coming between October and December. It has 30 days. Its name is from the Latin word novem, which means "nine". It was the ninth month of the year before January and February were added to the Roman Calendar.
November always begins on the same day of the week as March, and additionally, February in common years. November always ends on the same day of the week as August.
The Month
November is the eleventh month of the year in the Gregorian calendar, after October and before December, which is the last month. November has 30 days. It was the ninth month in the old Roman calendar, which is where its name comes from. It kept its name when January and February were added to the beginning of the year, despite becoming the eleventh month. The ninth month is now September.
November begins on the same day of the week as February in common years and March every year, as each other's first days are exactly 39 weeks (273 days) and 35 weeks (245 days) apart respectively. November ends on the same day of the week as August every year, as each other's last days are exactly 13 weeks (91 days) apart.
In common years, November starts on the same day of the week as June of the previous year, and in leap years, September and December of the previous year. In common years, November finishes on the same day of the week as March and June of the previous year, and in leap years, September of the previous year.
In years immediately before common years, November starts on the same day of the week as August of the following year, and in years immediately before leap years, May of the following year. In years immediately before common years, November finishes on the same day of the week as May of the following year, and in years immediately before leap years, February and October of the following year.
In the Northern Hemisphere, November is an Autumn (Fall) month, and the further north in the hemisphere, the more likely it is to get colder as December approaches. In the Southern Hemisphere it is a Spring month. In each hemisphere, it is the seasonal equivalent of May in the other.
Several observances around the beginning of the month are believed to be related, linked to the old Celtic celebration of Samhain on November 1. These events include Halloween (October 31), Day of the Dead in Mexico (October 31 to November 2), All Saints Day (November 1) and All Souls Day (November 2).
In several mainly Christian countries, it is month in which people who died in war are commonly remembered, mainly related to the end of World War I on November 11, 1918. Near the end of the month Advent, the period leading up to Christmas, begins.
Events in November
Fixed Events
October 31 to November 2 Day of the Dead (Mexico)
October 31/November 1 Samhain, Celtic and Pagan celebration.
November 1 All Saints Day (Christian); this is the day after Halloween.
November 1 Independence Day (Antigua and Barbuda)
November 1 World Vegan Day
November 1 Day of the Leaders of the Bulgarian National Revival.
November 1 Foundation Day (Kerala and Karnataka, India).
November 2 All Souls Day (Christian)
November 2 Statehood Day (North Dakota and South Dakota, US)
November 3 Independence Day (Panama)
November 3 Independence Day (Dominica)
November 3 Independence Day (Federated States of Micronesia)
November 4 Flag Day (Panama)
November 4 National Unity and Armed Forces Day (Italy)
November 4 Unity Day (Russia)
November 5 Guy Fawkes Night (United Kingdom, Canada, New Zealand)
November 6 Constitution Day (Dominican Republic)
November 9 Independence Day (Cambodia)
November 9 Schicksalstag (Germany), several historical events in German history occurred on this date.
November 10 National Heroes Day (Indonesia)
November 10 United States Marine Corps Birthday
November 10 Atatürk Remembrance Day (Turkey)
November 11 Remembrance Day (UK), or Veterans Day (US). At 11 am on 11 November 1918 the guns of the Western Front fell silent after more than four years of continuous warfare. The Allied nations chose this day and time for the commemoration of their war dead and continue to do so by marking a 1–2 minute silence at 11 am on November 11 each year. The time of the remembrance is also known as the eleventh hour of the eleventh day of the eleventh month.
November 11 Christian feast day of Saint Martin of Tours.
November 11 Independence Day (Poland)
November 11 Independence Day (Angola)
November 14 Children's Day (India)
November 14 World Diabetes Day
November 15 Republic Proclamation Day (Brazil)
November 15 Independence Day (Palestine)
November 16 Icelandic language Day
November 16 International Day of Tolerance.
November 16 Day of Declaration of Sovereignty (Estonia)
November 18 Independence Day (Latvia)
November 18 Birthday of Sultan Qaboos (Oman)
November 19 National Day of Monaco
November 19 International Men's Day
November 19 World Toilet Day
November 19 Flag Day (Brazil)
November 19 Liberation Day (Mali)
November 20 Revolution Day (Mexico)
November 20 Transgender Day of Remembrance (United States)
November 20 Day of National Sovereignty (Argentina)
November 22 Independence Day (Lebanon)
November 22 Day of the Albanian Alphabet
November 23 Saint George's Day in Georgia.
November 24 Lachit Divas (Assam in India)
November 25 Independence Day (Suriname)
November 25 National Day of Bosnia and Herzegovina
November 25 Christian feast day of Saint Catherine of Alexandria
November 27 Feast of Our Lady of the Miraculous Medal
November 28 Independence Day (Albania)
November 28 Independence Day (Mauritania)
November 28 Republic Day (Burundi and Chad)
November 29 International Day of Solidarity with the Palestinian People
November 29 Liberation Day (Albania)
November 29 Tubman Day (Liberia)
November 30 Saint Andrew's Day (Scotland)
November 30 Independence Day (Barbados)
November 30 Last day of the North Atlantic Hurricane Season
Moveable Events
Advent, Christian lead-up to Christmas, begins on Sunday closest to November 30, falling between November 27 and December 3.
Divali (Hinduism), celebrated in October or November
Election Day (United States), on Tuesday closest to November 5. Presidential Election is in leap years. Mid-term elections are in even-numbered common years, such as 2010. Gubernatorial Elections and Senate and House of Representatives Elections are also held.
First Tuesday - Melbourne Cup horse race in Australia
Movember - Month-long observance highlighting men's health issues.
Volkstrauertag (Germany), on Sunday closest to November 16.
The United States celebrates Thanksgiving holiday on the fourth Thursday of November.
Selection of Historical Events
November 1, 1512 The ceiling of the Sistine Chapel, painted by Michelangelo, goes on display.
November 1, 1755 An earthquake and tsunamis kills thousands of people in Lisbon, and affect other parts of Europe and North Africa.
November 1, 1922 Mehmed VI, the last Sultan of the Ottoman Empire, leaves the throne.
November 1, 1981 Antigua and Barbuda become independent from the United Kingdom.
November 1, 1993 The European Union is officially created.
November 2, 1889 North and South Dakota become the 39th and 40th States of the US.
November 2, 1963 South Vietnamese leader Ngo Dinh Diem is executed.
November 3, 1903 Panama becomes independent, separating from Colombia.
November 3, 1957 The Soviet Union sends the dog Laika into space. She does not survive.
November 3, 1978 Dominica becomes independent from the United Kingdom.
November 3, 1986 The Federated States of Micronesia become independent from the United States.
November 4, 1922 Howard Carter discovers the entrance to Tutankhamun's tomb.
November 4, 1956 The Hungarian Revolution is crushed by the Soviet Union.
November 4, 1995 Prime Minister of Israel Yitzhak Rabin is shot dead by Yigal Amir.
November 4, 2008 Barack Obama is elected the 44th, and first African American, President of the United States.
November 5, 1605 The Gunpowder Plot to blow up the Parliament in London fails, and Guy Fawkes and fellow conspirators are arrested.
November 6, 1834 The first Constitution of the Dominican Republic is adopted.
November 6, 1860 Abraham Lincoln is elected President of the United States.
November 7, 1917 In Russia, the October Revolution begins.
November 7, 2000 The US Presidential election between Al Gore and George W. Bush ends in dispute. Bush is declared the winner over a month later.
November 8, 1923 The Munich Beer Hall Putsch occurs, in Adolf Hitler's first attempt at power.
November 8, 1960 John F. Kennedy is elected President of the United States.
November 9, 1953 Cambodia becomes independent.
November 9 Significant Events in German history, including:
1918 The Weimar Republic is declared.
1923 The Munich Beer Hall Putsch is ended.
1938 Holocaust: Kristallnacht, during which Jewish synagogues and businesses were destroyed.
1989 The Berlin Wall falls, in a significant event towards the end of the Cold War.
November 10, 1989 Todor Zhivkov is brought from power in Bulgaria.
November 11, 1918 World War I comes to an end.
November 11, 1975 Angola becomes independent from Portugal.
November 12, 1918 Austria becomes a Republic.
November 13, 1970 A cyclone in present-day Bangladesh kills around 500,000 people.
November 13, 1985 The Nevado del Ruiz volcano erupts in Colombia, burying several towns under mudslides.
November 13, 2010 Burmese pro-Democracy leader Aung San Suu Kyi is released from house arrest.
November 14, 1963 The island of Surtsey is formed by a volcanic eruption to the south of Iceland.
November 15, 1889 Emperor Pedro II of Brazil is overthrown and Deodoro da Fonseca declares Brazil a Republic.
November 16, 1945 UNESCO is founded.
November 17, 1869 The Suez Canal, connecting the Mediterranean Sea and the Red Sea, is inaugurated.
November 18, 1918 Latvia declares independence from Russia
November 19, 1969 Brazilian footballer Pele scores the 1,000th goal of his career.
November 20, 1945 The Nuremberg Trials of leading Nazi war criminals begin.
November 20, 1975 Francisco Franco dies in Spain.
November 22, 1943 Lebanon becomes independent from France.
November 22, 1963 US President John F. Kennedy is shot dead in Dallas, Texas. Lyndon B. Johnson succeeds him.
November 22, 2005 Angela Merkel becomes the first female Chancellor of Germany.
November 23, 1963 British television programme Dr. Who is shown for the first time.
November 24, 1859 Charles Darwin's The Origin of the Species is published for the first time.
November 24, 1963 Lee Harvey Oswald is shot dead by Jack Ruby.
November 24, 1991 Freddie Mercury dies, one day after announcing that he had AIDS.
November 25, 1975 Suriname becomes independent from the Netherlands.
November 26, 1922 The tomb of Tutankhamun is entered.
November 26, 2008 The 26 November 2008 Mumbai attacks begin, as terrorists strike several locations in Mumbai, India, lasting until November 29.
November 28, 1520 The first navigation of the Magellan Strait, to the south of mainland South America, is completed by Ferdinand Magellan and his crew.
November 28, 1821 Panama unites with Greater Colombia.
November 28, 1912 Albania declares independence from the Ottoman Empire.
November 28, 1960 Mauritania becomes independent from France.
November 30, 1872 The first international football match is held between Scotland and England at Hamilton Crescent in Glasgow, ending 0-0.
November 30, 1966 Barbados becomes independent from the United Kingdom.
Trivia
November's flower is the Chrysanthemum. Its birthstone is the topaz.
The astrological signs for November are Scorpio (October 22 to November 21) and Sagittarius (November 22 to December 21): In the English language, November is the only month of the year whose two astrological signs begin with the same letter (they both start with an "S").
This month is tied with October as the months with the most births of US Presidents as of January 20, 2021: with six - James Knox Polk, Warren G. Harding (both on November 2), James Garfield (November 19), Joe Biden (November 20), Franklin Pierce (November 23) and Zachary Taylor (November 24).
November 1 is the only day in November during a common year to start within the fifth sixth of the calendar year.
November is also the only month of the year to be one of 26 letters in the NATO alphabet.
11 |
533 | https://simple.wikipedia.org/wiki/National%20anthem | National anthem | A national anthem is a country's official national song that the people of a country use to remember and respect their country. By the 18th century most countries had a national anthem and new countries chose a national anthem when they became independent. Some monarchies have a royal anthem for their monarch.
Related pages
List of national anthems
National flag
National symbols |
534 | https://simple.wikipedia.org/wiki/Name | Name | A name is a word (or a set of words) given to things and people.
For example, cat is the name of a kind of animal. "Ryan" is a name of a person, usually a male. "Julia" is a common female name.
The word 'name' can also be used as a verb. To name something is to give it a name.
People's names
In many cultures, there are rules and customs about how to give a person a name.
Some of the rules are defined by laws, and others are defined by traditions (doing things in the way they have been done for a long time).
There are rules about different aspects of the names and naming, including the following:
1. Number of parts of a name
In some cultures, a person has a one-part name, such as "ShiningWater."
In other cultures, a person has a two-part name, such as "John Smith."
In some cultures, a person can have any number of name parts. In the United States, for example, some people have three: first name, middle name, and last name. Other people have only two: a first and last name.
In Chinese cultures, it is typical for a person to have three-part name, such as "Cheah Ching San," where "Cheah" is the surname. Written in English format a comma is introduced making it "Ching San, Cheah."
In Muslim and Arabic culture, a name can have one to six parts. Such as "Abdullah ibn Muhammad Al ash-Sheikh".
2. Relations with names of parents and other relatives
In some cultures, people have the same "family name" (or surname) as their parents. For example, the father of John Smith may be Mike Smith. And Mike Smith's father may be James Smith. The "Smith" part is the same for all the family.
In other cultures, a person has the same name as his or her father, but the name is in a different place. For example, Shafiq Hanif's son may be Hanif Kamal. Hanif is in both the father's and son's name.
3. Name changes
In some cultures, a name changes when people marry, divorce, go through some religious ceremony, etc. For example, in some Spanish-speaking countries, people use two last names: their mother's father's name and their father's name. If Elena Rodriguez Gomez and Jose Sanchez Soria marry, she may change her name to Elena Rodriguez de Sanchez, and their child could be named Pilar Sanchez Rodriguez, taking the names of both of her grandfathers.
4. Name origins
In some cultures, personal names come from history. In most European countries, some first names are taken from the Bible. In some cultures, names are taken from a relative. In other cultures, a name shows what the parents hope their child will be like. A baby may be given a name Wisdom because parents hope the baby will be a wise girl or boy.
Some cultures avoid giving people a name of an animal. For example, there is no name like dog, cat, snake, owl, or fish in Japanese people's first names. But in some cultures animal names may be good.
5. Lengths, pronunciations, spelling, etc.
In some languages and cultures, you can tell if a word is a person's name or not by just looking at the spelling or listening to its pronunciation. There are some other linguistic patterns. For example, many Chinese names are made up of three syllables.
6. Use of names, titles, nicknames, etc.
In some cultures, people use names when they call each other. In other cultures, people use their nicknames. In some other cultures, people use their titles ("father," "professor," etc.) when they call each other.
7. Spelling of names, titles, nicknames, etc.
8. Name awareness
Taking note of names is taken a step farther by those who elect to celebrate a name (e.g., "Celebrate Your Name Week") whether their own name, someone else's name, or names in general, complete ownership of one's name might very well include celebrating it. 9. Middle names
While some people might choose to "hide" a middle name for any number of reasons (i.e., they consider the middle name they were given to be an "embarrassment"), others have taken to celebrating their middle name (e.g., "Middle Name Pride Day").
In the English language, names exclusively are usually pronounced in correlation with the spelling, however can be pronounced as desired, e.g. John is (jon) but can also be (ned). However, not probable, is held true in the English rules of grammar.
Examples of names
Sarah, Lucy, Ellen, Claire, Ben.
Names can be shortened e.g. Isabelle can become Izzy or Belle.
Japanese names
Here are some things that are often found in Japanese names today. In the past, people went by different rules.
1. Number of parts of a name
Japanese names have two parts. One is the family name and the other is the given name.
"Suzuki Ichiro" is a name of a Japanese person. Suzuki is the family name, and Ichiro is the first name. In the Japanese language, the family name comes first, and the given name comes second. (It is like writing Smith John, instead of John Smith.)
Only some members of the royal family do not have a family name.
2. Relations with names of parents and other relatives
A newborn baby gets a family name from their parents. The parents have the same family name. So, a son of Ono Yoko (female) and Ono Ken (male) is Ono something.
The family name Ono is mostly shared by the paternal (male) part of the family. So Ono Ken's parents have the family name Ono, but Ono Yoko's parents probably do not.
3. Name changes
Names of people change when they marry and divorce. It is a custom in many parts of the world that women change their family name to that of their new husband when they marry. However, in Europe and North America especially, many women no longer do this even though their mothers and grandmothers may have. Sometimes, the man will take the woman's family name.
4. Name origins
5. Lengths, pronunciations, spelling, etc.
6. Use of names, titles, nicknames, etc.
Related pages
Noun
Synonym
Basic English 850 words |
535 | https://simple.wikipedia.org/wiki/Niihau | Niihau | Niihau (or Niʻihau) is the smallest of the inhabited islands of Hawaii, in the United States. It has a land area of 70 sq. miles (184 km2). It is the oldest of the eight main islands.
Ownership
The whole island is owned by the Robinson family. They bought it from the Kingdom of Hawaii for $10,000. It was said that the buyer, Elizabeth Sinclair (later Sinclair-Robinson), liked the island better than other places such as Waikiki, Pearl Harbor, and the island of Lanai. There is a small US Navy base where a few Navy people work.
Inhabitants
The island has a few hundred permanent inhabitants. Almost all of them are native Hawaiians. They support themselves largely with small family farms. Many work for the ranch owned by the Robinsons. The native Hawaiians lead a rural, low-tech life. They speak the Hawaiian language and keep traditions alive. This is because Ms. Sinclair promised to help preserve Hawaiian culture and tradition when she bought the island. Niihau is the only one of the Hawaiian islands where the Hawaiian language is the main language.
Tourism
Niihau is also known as the "Forbidden Island". This is due to the fact that until recently, the island was off-limits to all but family members, US Navy personnel, government officials and expressly invited guests. Now, tourists can go on one of a limited number of supervised tours or hunting safaris.
Beaches
On the beaches of the island are found shells which are the only shells to be classified as gems. Niihau shells and the jewelry made from them are very popular. Many, especially those with darker and richer color, are collectors items. The sale of shells and shell jewelry brings extra money for the local people.
Islands of Hawaii |
536 | https://simple.wikipedia.org/wiki/N%C4%93n%C4%93 | Nēnē | The Nēnē, or Hawaiian goose (Branta sandvicensis) is a species of goose. It is found today on only three Hawaiian islands. It gets its name from its soft call.
This is an unmistakable species, with its generally brown plumage (feathers) and darker head. Its strong toes have much reduced webbing (skin between the toes), an adjustment to the lava flows on which it breeds. The Nēnē goes about on land much more than other water birds. When moulting (dropping old feathers and growing new ones), the Nēnē cannot fly, as do other geese, a factor which made it vulnerable to hunting.
The Nēnē was once among the most threatened waterfowl species around the world. Once common, hunting and predators brought to the islands such as mongooses, pigs and cats reduced the population to only 30 birds in the 1950s. However, this species breeds well in captivity (zoos and bird parks), and has been successfully re-introduced. There are also good numbers in wild bird collections.
The Nēnē is the state bird of Hawaii.
References
Geese
Birds of Oceania |
537 | https://simple.wikipedia.org/wiki/Network | Network | Network might refer to:
Computer network
Virtual private network
Neural network
Social network
Television network
Transport network
Related pages
Contact network, a disambiguation page |
539 | https://simple.wikipedia.org/wiki/Fishing%20net | Fishing net | A fishing net is a woven trap usually used to catch fish. They are usually made out of rope. A net is a kind of tool.
Fishing nets are one of the oldest ways of catching fish. They can be made with all kinds of fabric like nylon, cotton, grass, flax, and tree fibers. The oldest known fish nets dates back to 8500 BC in Finland. Native Americans made their nets on the Columbia River from grass, cedar, and spruce root fibers.
Other methods of catching fish
Spear
Tame Cormorant
References
Basic English 850 words
Fishing
Tools |
540 | https://simple.wikipedia.org/wiki/Internet%20slang | Internet slang | Internet slang is slang words which are used on the internet. Most of these words are new, such as Wiki and blog, which were not used before the internet became popular.
Some old words were given new meanings, such as mail (which now means email). This makes many metaphors on the Internet, such as boot (which otherwise mean a shoe) and link (which otherwise means a joint in a metal chain). Some existing acronyms, such as "AFK" (To mean "Away from keyboard") and "IRL" (To mean "In real life") were used on bulletin board systems before the internet became popular. These are now used on the internet, such as in chat rooms and on instant messenger software.
People have also created some verbs and adjectives to describe things that only happen on the internet:
To flame - to send offensive messages, usually in chat rooms, forums, instant messaging software or email.
To ping - to send some data to another computer and see how long it takes for the data to come back.
Shorthand words
Shorthand is where a word is written in a shorter way because it is quicker and easier to type. It is also done to fit more text into a limited space.
Internet slang uses many acronyms because they are quicker and easier to type. They are often shorthand for common phrases and idioms, but they can show somebody's emotions and their certainty.
Leet speak
Leet speak (written as: L33T or 1337) is the most common language on MMORPGs because rude words are not stopped by filters. This language is changing all the time because new words are made and used. A lot of the words use numbers instead of letters but some were made because of typing errors which are now done on purpose. Also, some suffixes are used, such as -age and -ness.
Some of the numbers and symbols used instead of letters are in the table below. |
542 | https://simple.wikipedia.org/wiki/Nauru | Nauru | Nauru, ( ) is a island nation in the South Pacific. Its nearest neighbour is Kiribati, east. Nauru is the smallest island nation, covering just , the smallest republic, and the only republican state without a capital. With 10,670 residents, it is the third least-populated country after Vatican City and Tuvalu.
Nauru is a phosphate rock island, and its main export since 1907 has been phosphate. English and Nauruan are the official languages. The president is David Adeang.
Geography
Nauru is a oval-shaped island in the southwestern Pacific Ocean, south of the equator. The island is surrounded by a coral reef, which can be seen during low tide. Because of this, a harbor can not be built. Canals let small boats get to the island. A an area of ground where plants can easily grow wide lies inland from the beach.
Coral cliffs surround Nauru's plateau (highland). The highest point, the Command Ridge, is above sea level. The only fertile areas are on the coastal belt, where coconut palms flourish. The land surrounding Buada Lagoon supports bananas, pineapples, vegetables, pandanus trees, and hardwoods such as the tomano tree.
Nauru was one of three great phosphate rock (bird droppings) islands in the Pacific Ocean (the others were Banaba (Ocean Island) in Kiribati and Makatea in French Polynesia). The phosphate reserves on Nauru are now almost used up. Phosphate mining in the plateau has left a bare area of land of limestone peaks up to high. Mining has stripped and destroyed about 80 per cent of Nauru's land, and has affected the surrounding Exclusive Economic Zone. About 40 per cent of marine life has been killed by mud and phosphate drainage.
There are only about 60 native vascular plant species on the island. Coconut farming, mining, and introduced species have damaged the island's native vegetation. There are no native land mammals, but there are native insects, land crabs, and birds, including the Nauru Reed Warbler. The Polynesian rat, cats, dogs, pigs, and chickens have been introduced to Nauru from ships.
There are only a few fresh water sources on Nauru. Storage tanks collect rainwater, but the islanders usually have to rely on desalination plants at Nauru's Utilities Agency.
The island's biggest problems are climate change and rising sea levels. Nauru is the seventh most global warming threatened nation due to flooding. At least 80 per cent of the land of Nauru is well elevated, but this area will be uninhabitable until the phosphate mining improvement programme is started
Climate
Nauru's climate is hot and very humid year-round because of how close it is to the equator and the ocean. Nauru is hit by monsoon rains between November and February, but does not usually have cyclones. How much rain there is every year is highly variable, and is influenced by the El Niño-Southern Oscillation. There have been many droughts in Nauru because of this. The temperature on Nauru ranges between and during the day, and between and at night.
Administrative divisions
Nauru is divided into fourteen administrative districts.
References
Other websites
Nauru, Permanent Mission to the United Nations
Asian Development Bank Country Economic Report, Nauru, November 2007
Our Airline - the former Air Nauru
Discover Nauru The Official Nauru Tourism Website
CenPac - The ISP of the Republic of Nauru
Radio program "This American Life" featured a 30-minute story on Nauru
High resolution aerial views of Nauru on Google Maps
Nauru country information on globalEDGE
Commonwealth member states |
543 | https://simple.wikipedia.org/wiki/Noun | Noun | A noun is a kind of word (see part of speech) that is usually the name of something such as a person, place, thing, animal, or idea. In English, nouns can be singular or plural.
Nouns often need a word called an article or determiner (like the or that). These words usually do not go with other kinds of words like verbs or adverbs. (For example, people do not also describe nouns). In English, there are more nouns than any other kind of word.
Every language in the world has nouns, but they are not always used in the same ways. They also can have different properties in different languages. In some other languages, nouns do not change for singular and plural, and sometimes there is no word for the.
Examples of nouns: time, people, way, year, government, day, world, life, work, part, number, house, system, company, end, party, information.
History
The word noun comes from the Latin nomen meaning "name." Words like nouns were described in early days by the Sanskrit grammarian Pāṇini and ancient Greeks like Dionysios Thrax. Also in ancient Tamil like "Peyarchol"
Uses of nouns
In English sentences, nouns can be used as a subject, object, or complement. They often come after prepositions, as the 'object of preposition'.
Nouns can sometimes describe other nouns (such as a soccer ball). When they do this, they are called modifiers or adjuncts.
There are also verb forms that can be used in the same way as nouns (such as 'I like running.') These are called verbals or verbal nouns, and include participles (which can also be adjectives) and infinitives.
Nouns are classified into common and proper. Pronouns have commonly been considered a different part of speech from nouns, but in the past some grammars have included them as nouns as do many modern linguists.
Proper nouns
Proper nouns (also called proper name) are specific names. Examples of proper nouns are: London, John, God, October, Mozart, Saturday, Coke, Mr. Brown, Atlantic Ocean. Proper nouns are individual things with names, not general nouns.
Proper nouns begin with an upper case (capital) letter in English and many other languages that use the Roman alphabet. (However, in German, all nouns begin with an upper case letter.) The word "I" is really a pronoun, although it is capitalized in English, like a proper noun.
Some common nouns (see below) can also be used as proper nouns. For example, someone might be named "Tiger Smith" -- even though he is not a tiger or a smith.
Common nouns
Common nouns are general names. Sometimes the same word can be either a common noun or a proper noun, depending on how it is used; for example:
there can be many gods, but there is only one God.
there can be many internets (two or more networks connected together), but the largest internet in the world is the Internet.
It is good for the heart to drink the juice of pineapple.
Countability
In English and many other languages, nouns have 'number'. But some nouns are only singular (such as furniture, physics) and others are only plural (such as clothes, police). Also, some nouns are countable (for example, one piece, two pieces) but others are uncountable (for example, we do not say one furniture, two furnitures).
The plural form of most nouns is created simply by adding the letter(s) -(e)s.
more than one snake = snakes
more than one ski = skis
more than one Barrymore = Barrymores
Despite plural forms being written using the letter(s) -(e)s, the pronunciation of the letter(s) will pronounced as /-s/, /-z/, or /-ız/ depending on which type of phoneme, or unique sound, comes before it. These variations of the plural morpheme are called allomorphs.
Some dictionaries list "busses" as an acceptable plural for "bus". Presumably, this is because the plural "buses" looks like it ought to rhyme with the plural of "fuse," which is "fuses." "Buses" is still listed as the preferable plural form. "Busses" is the plural for "buss," a seldom used word for "kiss."
There are several nouns that have irregular plural forms. Plurals formed in this way are sometimes called mutated (or mutating) plurals.
more than one child = children
more than one woman = women
more than one man = men
more than one person = people
more than one goose = geese
more than one mouse = mice
more than one deer = deer
more than one ox = oxen
more than one tooth = teeth
Many of the above irregular plural forms stem from Old English, which had more complex rules for making plural forms.
And, finally, there are nouns that maintain their Latin or Greek form in the plural.
more than one nucleus = nuclei
more than one syllabus = syllabi
more than one focus = foci
more than one fungus = fungi
more than one cactus = cacti (cactuses is acceptable)
more than one thesis = theses
more than one crisis = crises
more than one phenomenon = phenomena
more than one index = indices (indexes is acceptable)
more than one appendix = appendices (appendixes is acceptable)
more than one criterion = criteria
more than one octopus = octopedes is correct (as the word is ). However, octopuses is acceptable, more used and simpler.
Possessives
Nouns are words for things, and since things can be possessed, nouns can also change to show possession in grammar. In English, we usually add an apostrophe and an s to nouns to make them possessive, or sometimes just an apostrophe when there is already an s at the end, like this:
This is Sam. This is Sam's cat.
The woman's hair is long.
There are three cats. The cats mother is sleeping.
How adjectives become nouns
Most adjectives become nouns by adding the suffix -ness. Example: Take the adjective 'natural', add 'ness' to get 'naturalness', a noun. To see a list of 100 adjectives used in Basic English, click here.
Word order in noun phrases
A noun phrase is a phrase where the head word is a noun. In English, the word order of most noun phrases is that determiners, adjectives, and modifying nouns in respective order must appear before the head word, and relative clauses must appear after the head word.
References
Other websites
Nouns
Parts of speech |
547 | https://simple.wikipedia.org/wiki/Nature | Nature | The words nature and natural are used for all the things that are normally not made by humans. The word comes from the Latin natura meaning "birth". Nature includes many things like weather, organisms, landforms, celestial bodies. Scientists study the way the parts of nature work. Things that have been made by people are said to be man-made or called artifacts.
There are natural sciences that study different parts of nature, for example the science of ecology is about plants and animals as a whole, while biology studies every type of living thing.
From one point of view, humans are a prime example of nature, and are the most widely studied natural inhabitants of the planet earth. Humans interact with each other in their natural environment on a day-to-day basis. Every part of nature everything from the air outside to the dirt on the ground is interdependent. Medicine studies humans in health and sickness.
From another point of view, humans and nature can be said to be in conflict. People always use natural resources. They cut down trees, mine ores, grow crops and manufacture things from natural material. Fires, cars, and factories make a lot of smoke and harm many places. People who like to leave nature unharmed and those who feel they need to use more of nature often fight about what they should do. In the modern world, with many more people and many big cities, these problems are becoming more serious.
Nature, in the broadest sense, means the physical world as a whole. This is the meaning that physics, the study of nature (etymologically), takes.
A useful definition of natural is
"Happening or operating in accordance with the ordinary course of nature". Oxford Shorter English Dictionary says the word in this sense is first found in 1477.
Related pages
Human nature
Life timeline
Nature timeline
Nature versus nurture
Other websites
References
Bionics |
552 | https://simple.wikipedia.org/wiki/Natural%20resource | Natural resource | A natural resource is what people can use from the natural environment. Examples of natural resources are air, water, wood, oil, wind energy, natural gas, iron, and coal.
The dividing line between natural resources and man-made resources is not clear-cut. Hydro-electric energy is not a natural resource because people use turbines to convert the energy made from moving water. Petroleum and iron ores are natural, but need work to make them into usable refined oil and steel. Atomic energy comes from metallic nuclear fuel, like fissionable uranium and plutonium, but rocks need technical work to make them into these nuclear fuels.
Supply
We often say there are two sorts of natural resources: renewable resources and non-renewable resources.
A renewable resource is one that can be used again and again. For example, soil, sunlight and water are renewable resources. However, in some circumstances, even water is not renewable easily. Wood is a renewable resource, but it takes time to renew, and in some places, people use the land for something else. Soil, if it blows away, is not easy to renew.
A non-renewable resource is a resource that does not grow and come back or a resource that would take a very long time to come back. For example, coal is a non-renewable resource. When we use coal, there is less coal afterward. The non-renewable resource can be used directly (for example, burning oil to cook), or we can find a renewable resource to use (for example, using wind energy to make electricity to cook).
Most natural resources are limited. This means they will eventually run out. A perpetual resource has a never-ending supply. Some examples of effectively perpetual resources include solar energy, tidal energy, and wind energy. They are perpetual in effect, although absolutely they do have a limit. There may be a practical limit to how much can be taken in a given day or year, but that amount can be taken again next day or next year (though not for ever).
Non perpetual resources include fossil fuels such as petroleum, coal, etc. They have a limit of usage, and are running out.
Some of the things influencing the supply of resources include whether it is able to be recycled, and whether there are suitable substitutes for the material. Non-renewable resources cannot be recycled. For example, fossil fuels cannot be recycled.
Demand
The demand for resources can change with new technology, new needs, and new economics (e.g. changes in cost of the resources). Some material can go completely out of use, if people do not want it any more. Demand of many natural resources is very high, but availability of some, such as precious metals, is very low.
Availability
Different places have different natural resources. When people do not have a certain resource they need, they can either replace it with another resource, or trade with another country to get the resource. People have sometimes fought to have them (for example, spices, water, arable farmland, gold, or petroleum).
When people do not have some resources, their quality of life can get lower. So, people protect resources. When they can not get clean water, people may become ill; if there is not enough wood, trees will be cut and the forest will disappear over time (deforestation); if there are not enough fish in a sea, people can die of starvation. Renewable resources include crops, wind, hydroelectric power, fish, and sunlight Many people carefully save their natural resources so that others can use them in future.
References
Other websites
Earth's natural wealth
Economics
Factors of production |
554 | https://simple.wikipedia.org/wiki/Negentropy | Negentropy | Negentropy is reverse entropy. It means things becoming more in order. By 'order' is meant organisation, structure and function: the opposite of randomness or chaos. One example of negentropy is a star system such as the Solar System. Another example is life.
As a general rule, everything in the universe tends towards entropy. Star systems eventually become dead. All energy has gone, and everything in the system is at the temperature of the surrounding space. The opposite of entropy is negentropy. It is a temporary condition in which certain things are hotter and more highly organised than the surrounding space. This is the second law of thermodynamics:
The second law of thermodynamics states that the total entropy of an isolated system always increases over time.
Life is considered to be negentropic because it converts things which have some order, such as food, into things with more order, such as cells in the body, tissues, and organs. In doing so, it gives off heat. Another example of negentropic things are societies, or social systems, because they take disorderly things such as communications, and make them more orderly and useful.
Notes
Thermodynamics |
557 | https://simple.wikipedia.org/wiki/North%20America | North America | North America is a large continent in the Northern and Western Hemispheres of Earth. It is to the east of the Pacific Ocean, the west of the Atlantic Ocean, the south of the Arctic Ocean, and it is the northern part of the Americas. The southernmost part is Central America. It is the third largest continent in the world after Asia and Africa. North America has a population of around 371 million and is the 4th most populous continent in the world.
North America has three subregions which are the Caribbean, Central America, and North America. Depending on how it is used, "North America" can be used to mean as the continent as a whole to include all 23 countries or as a subregion to mean Canada, Mexico, and the United States only.
Hundreds of millions of years ago, North America was part of a larger ancient supercontinent named Laurasia. A few million years ago, a new land bridge arose and connected North America to South America. Beringia connected North America to Siberia a few times during ice ages in the past 20,000 years. North America has many warm tropical islands such as the Bahamas. North America is currently north of South America.
Countries
Related pages
Central America
South America
References
Laurasia |
558 | https://simple.wikipedia.org/wiki/Neptune | Neptune | Neptune is the eighth and farthest planet from the Sun in the Solar System. It is an ice giant. It is the fourth-largest planet in the system.
Neptune's mass is 17 times Earth's mass and a little bit more than Uranus's mass. Neptune is denser and smaller than Uranus. Because of its greater mass, Neptune's gravity makes its atmosphere smaller and denser.
It was named after the Roman god of the sea, Neptune. Neptune's astronomical symbol is ♆, the trident of the god Neptune.
Neptune's atmosphere is mostly hydrogen and helium. It also contains small amounts of methane which makes the planet appear blue. Neptune's blue color is much darker than the color of Uranus. Neptune also has the strongest winds of any planet in the Solar System, as high as 2,100 km/h or 1,300 mph.
Urbain Le Verrier and John Couch Adams were the astronomers who discovered Neptune. Neptune was not discovered using a telescope. It was the first planet to be discovered using mathematics. In 1821, astronomers saw that Uranus' orbit was different from what they expected. Another nearby planet's mass was changing Uranus's orbit. They found Neptune was the cause.
Voyager 2 visited Neptune on 25 August 1989. It was the only spacecraft to visit the planet. Neptune used to have a huge storm known as the "Great Dark Spot". Voyager 2 discovered the spot in 1989. The dark spot was not seen in 1994, but new spots were found since then. It is not known why the dark spot disappeared. Visits by other space probes have been planned.
Neptune has five rings. These rings are hard to see from the Earth.
History
Discovery
Galileo Galilei was the first person who saw Neptune. He saw it on 28 December 1612 and 27 January 1613. His drawings showed points near Jupiter where Neptune is placed. But Galileo was not credited for the discovery. He thought Neptune was a "fixed star" instead of a planet. Because Neptune slowly moved across the sky, Galileo's small telescope was not strong enough to see that Neptune was a planet.
In 1821, Alexis Bouvard published the astronomical tables of the orbit of Uranus. Later observations showed that Uranus was moving in an irregular way in its orbit. Some astronomers thought this was caused by another large body. In 1843, John Couch Adams calculated the orbit of an eighth planet that could possibly affect the orbit of Uranus. He sent his calculations to Sir George Airy, the Astronomer Royal. George Airy asked Adams for an explanation. In 1846, Urbain Le Verrier made his own calculations but also failed to get much attention from French astronomers. Airy saw his calculations and encouraged James Challis to search for the planet. Challis began his search in July 1846. Meanwhile, Le Verrier had convinced Johann Gottfried Galle to search for the planet.
Heinrich d'Arrest, a student at the Berlin Observatory, suggested that a newly drawn map of the sky in the region of Le Verrier's predicted area could be compared with the current sky. This map was needed to look for the change of position of a planet, compared to a fixed star. Neptune was discovered the same night on 23 September 1846. It was found 1° from where Le Verrier had thought it would be. It was about 1.5° from Adams' prediction. Challis later found out that he had seen the planet twice in August. He did not recognize it at the time because of his careless work approach. Neptune became the first planet to be discovered by mathematical calculations instead of a telescope.
Crediting and naming
When Neptune was discovered, the French and the British could not agree on who would get credit for the discovery. Later, an international agreement decided that both Le Verrier and Adams deserved credit. However, historians reviewed the topic after the rediscovery in 1998 of the "Neptune papers" (historical documents from the Royal Greenwich Observatory). It had seemingly been stolen by astronomer Olin Eggen for nearly three decades. It was only found again (in his ownership) shortly after his death. After looking at the documents, some historians now think that Adams does not deserve equal credit with Le Verrier.
Shortly after its discovery, Neptune was temporarily called "the planet exterior to Uranus" or "Le Verrier's planet". The first suggestion for a name came from Galle. He proposed the name Janus. In England, Challis suggested the name Oceanus. In France, Arago suggested that the new planet be called Leverrier, but a lot of people outside France disagreed with this. French almanacs quickly reintroduced the name Herschel for Uranus and Leverrier for the new planet.
Meanwhile, Adams suggested changing the name Georgian to Uranus, while Le Verrier (through the Board of Longitude) suggested Neptune for the new planet. Struve supported the name Neptune on 29 December 1846, to the Saint Petersburg Academy of Sciences. Soon Neptune was internationally agreed among many people. It was the official name for the new planet. In Roman mythology, Neptune was the god of the sea, identified with the Greek god, Poseidon. Neptune's astrological symbol is Neptune's trident (♆).
Structure
Mass and composition
Neptune's mass is between that of the Earth and the largest gas giants.
Neptune is the fourth largest planet in the solar system and the third most massive. Neptune is 17 times the mass of Earth, but just the mass of Jupiter. Neptune is a little bit more massive than Uranus, though Neptune is denser and physically smaller than Uranus. Neptune and Uranus are often considered to be part of a sub-class of a gas giant known as "ice giants". They are smaller in size than Jupiter and Saturn, and have differences from them in composition. In the search for extrasolar planets, Neptune has been used as a reference to compare the size and structure of the discovered planet. Some discovered planets that have similar masses like Neptune are often called "Neptunes".
The atmosphere of Neptune is made up mostly of hydrogen, with a smaller amount of helium. A tiny amount of methane was also detected in the atmosphere. The methane gives Neptune its blue color. The color of Neptune is much darker than the color of Uranus.
Because of Neptune's far distance from the Sun, it gets very little heat. The average surface temperature on Neptune is about −201°C (−331 °F; 72 K). Therefore, at its surface Neptune is the coldest planet in the Solar System.
But in the depths of the planet, the temperature rises. The source of this heating is unclear. Neptune is the farthest planet from the Sun, yet its internal energy is strong enough to create the fastest winds seen in the Solar System, at . Several possible explanations have been suggested. Firstly, radiogenic heating from the planet's core. Among the explanations is the continued radiation into space of leftover heat made by infalling matter during the planet's birth. Another explanation is gravity waves breaking above the tropopause. It has also been suggested that the friction and ram pressure of the diamond hail heats up the planet.
The structure inside Neptune is thought to be similar to the structure inside Uranus. There is likely to be a core, thought to be about 1.5 Earth masses. It is made up of molten rock and metal surrounded by rock, water, ammonia, and methane. This mixture is referred to as icy. It is called a water-ammonia ocean. More mixtures of methane, ammonia, and water are found in the lower areas of the atmosphere.
At a depth of 7,000 km of Neptune, the conditions may be such that methane decomposes into diamond crystals. These diamond crystals look like hailstones.
Weather and magnetic field
One difference between Neptune and Uranus is the level of its meteorological activity. When the Voyager spacecraft flew by Uranus in 1986, the winds on that planet were observed not so strong as on Neptune. When Voyager flew by Neptune in 1989, powerful weather events were observed. The weather of Neptune has very active storms. Its atmosphere has the highest wind speeds in the Solar System. It may be powered by internal heat flow. Regular winds in the equatorial region have speeds of around 1,200 km/h (750 mph). Winds in storm systems can reach up to 2,100 km/h, near-supersonic speeds.
In 1989, the Great Dark Spot, an anticyclonic storm system, was discovered by NASA's Voyager 2 spacecraft. On 2 November 1994, the Hubble Space Telescope did not see the Great Dark Spot on the planet. Instead, a new storm similar to the Great Dark Spot was found in the planet's northern hemisphere. The reason why the Great Dark Spot has disappeared is unknown. The Scooter is another storm, a white cloud group farther south than the Great Dark Spot. Its nickname was given when first noticed in the months leading up to the Voyager encounter in 1989. It moved faster than the Great Dark Spot. Later images showed clouds that moved even faster than Scooter. The Wizard's Eye/Dark Spot 2 is another southern cyclonic storm, the second strongest storm seen during the 1989 encounter. It originally was completely dark, but as Voyager came closer to the planet, a bright core developed.
In August 2023, the clouds vanished. The possible reason is solar flare. 30 years of Neptune' weather observations by Hubble Space Telescope showed that cloud activity is related to solar cycles.
Neptune also has similarities with Uranus in its magnetosphere. However, Uranus's magnetosphere is weaker than Neptune's magnetosphere. The magnetic field is strongly tilted compared to its rotational axis at 47°. It is offset at least 0.55 radii (about 13,500 kilometres, bigger than the Earth's diameter, for scale) from the planet's physical center. The unusual course may be caused by flows in the interior of the planet.
Neptune has a similar axial tilt to Earth, so it will have seasons. Seasons last about 40 years.
Neptune's rings
There are five rings around the planet. They are not as well known as the rings of Saturn. The rings were discovered by a team led by Edward Guinan in 1968. Then, in the mid-1980s astronomers thought that the rings might not be complete. Stellar occultations were found that rarely showed an extra "blink" just before or after the planet moved in front of the star. However, Voyager 2 showed that they were complete. The planetary rings of Neptune have a weird "clumpy" arrangement. Scientists think that it may be because of the gravitational contact with small moons that orbit near them. Pictures showed that the ring system had several faint rings. The farthest ring, Adams, has five arcs now named Courage, Liberté, Egalité 1, Egalité 2 and Fraternité (Courage, Liberty, Equality, and Fraternity).
Arcs are a puzzle. The laws of motion predict that arcs spread out into one ring in a very short time. But the arcs in Neptune's rings did not. A moon's gravity may have created the arcs. Galatea is a moon just inside the Adams ring.
In 2005, scientists figured out that Neptune's rings were more unstable than had been believed. The Liberté arc may disappear in less than 100 years.
Neptune's moons
Neptune has 14 known moons. As Neptune was the Roman god of the sea, the planet's moons were named after lesser sea gods or goddesses.
The largest moon of Neptune is Triton. Triton was discovered on October 10, 1846, by British astronomer William Lassell. Unlike all other large planetary moons, Triton orbits in the other direction to the other moons. This shows the moon was probably captured and maybe was once a Kuiper belt object. It is close enough to Neptune to be locked into a synchronous orbit. It is also slowly moving into Neptune and may one day be torn apart when it passes the Roche limit. Triton is the coldest object that has been measured in the Solar System, with temperatures of −235 °C (38 K, −392 °F).
Neptune's second known moon (by order of discovery), the odd moon Nereid, has one of the most unusual orbits of any satellite in the Solar System. Nereid is so far from Neptune that it requires 360 Earth days to make one orbit. It causes the largest elliptical orbit and the largest deviation from a circular path. It is also considered that Nereid may be a captured asteroid or Kuiper Belt object.
From July to September 1989, Voyager 2 discovered six new moons of Neptune. Of these, Proteus is the second most massive Neptunian moon. It has only one quarter of 1% of the mass of Triton. Neptune's closest four moons, Naiad, Thalassa, Despina, and Galatea, orbit close enough to be inside Neptune's rings. The next farthest out, Larissa was discovered in 1981 when it had covered up a star. The moon was credited for causing Neptune's ring arcs when Voyager 2 observed Neptune in 1989. Five new unusual moons discovered between 2002 and 2003 were announced in 2004. The latest moon, Hippocamp, was discovered from examining Hubble Telescope images on 16 July 2013.
Observation
Neptune can not be seen by just looking at the sky with the naked eye. To see it, a telescope or binoculars is needed. This is because Neptune has a normal brightness between magnitudes +7.7 and +8.0. It can be out-shined by Jupiter's Galilean moons, the dwarf planet Ceres, and the asteroids 4 Vesta, 2 Pallas, 7 Iris, 3 Juno and 6 Hebe. A telescope or strong binoculars show Neptune as a small blue dot that looks similar to Uranus. The blue color comes from the methane in its atmosphere. Its small size in the night sky has made it difficult to study visually. Most telescopic data was quite limited until the arrival of the Hubble Space Telescope and large ground-based telescopes with adaptive optics.
The average distance between Neptune and the Sun is about 4.5 billion km. Therefore, Neptune completes its orbit once every 164 years. On 12 July 2011, Neptune completed its first orbit since its discovery in 1846.
Exploration
Currently, only one spacecraft has visited Neptune. NASA's Voyager 2 probe made a quick flyby of the planet with its closest encounter on 25 August 1989.
One of Voyager 2'''s important discoveries was its very close fly-by of Triton, where it took pictures of several parts of the moon. The probe also discovered the Great Dark Spot. However, it had now disappeared after the Hubble Space Telescope took pictures of Neptune in 1994. Originally thought to be a large cloud or cyclonic storm system. It was later guessed to be a hole in the visible cloud deck.
The pictures sent back to Earth from Voyager 2 in 1989 became the basis of a PBS all-night program called Neptune All Night''.
Proposed missions
Interstellar Express—Two probes by CNSA to explore the heliosphere. The second probe would come within 1,000 km of Neptune in 2038.
ODINUS—This mission uses two spacecraft to study the Neptunian and Uranian systems. 2034 is launch date.
OSS mission—This is a mission by ESA and NASA. Its focus is to map the gravitational fields in deep space, including the Outer Solar System (up to 50 AU).
Triton Hopper—A NIAC plan for a mission to Neptune to land on Neptune's moon Triton and then fly to several places.
Trident—This is a finalist in the Discovery program. It will fly close to Neptune once in 2038 and closely study its largest moon Triton.
Neptune Odyssey—An idea for a NASA mission to observe Neptune's atmosphere and the weather, and its moon Triton. It would launch in 2033 and arrive at Neptune in 2049.
References
Other websites
NASA's Neptune fact sheet
Neptune Profile by NASA's Solar System Exploration
Planets - Neptune A kid's guide to Neptune.
Mission to Neptune Under Study (Universe Today)
Neptune by amateur (The Planetary Society) |
561 | https://simple.wikipedia.org/wiki/Negative | Negative | Negative may mean:
Something negative can be something bad.
A negative number is a number that is less than zero. 5 - 8 = -3.
Some people also use negative the same way as "no", or other related words. "Not", "Never", "Nowhere" etc. are all negative words. On two-way radios the word "negative" is used instead of "no" to be clearer.
In film photography, a film negative is an exposed picture or movie film that has been processed, and is ready to be used to make a print. In a negative, everything in the picture has the opposite color. Things that are white will be black, things that are red will be green, and things that are orange will be blue.
Negative binary numbers
Negative charge
Negative exponent
Negative feedback, a basic concept of cybernetics; it is the basis of regulation and control. It is important in engineering and physiology. In biology and physiology negative feedback is known as homeostasis
Negative gravity |
564 | https://simple.wikipedia.org/wiki/Now | Now | Now is the time span between the past and the future. It can be long (like an eon in geologic time) or short (like a picosecond) but it is almost always used to refer to the span between the present instant to some time horizon when a decision must be made. It can be used to ask or demand that someone make a decision even if they want to delay.
"I want to know what you think, now."
"What do you think now?"
"Now is the time for all good people to come to the aid of their country."
Mathematics and measurement assume that everything used in one equation equals the same quantities at the beginning of calculation or axiomatization as at the end. That means it is mathematically correct to say that the idea of "equal" means "equal from the time the process starts to the time it ends." In General Semantics and E Prime the words equal, remain (for the past until now) and become (for now into the future) replace the verb "to be" for this reason.
Algebra is now often called snapshot algebra or algebra of seeing because of this dependence on time. If any action or event were possible between steps in algebraic analysis, then, in theory, one would have to start over as if one had no knowledge of the new state at all. For these reasons the idea of statistics and also knowledge and knowledge management are sometimes questioned, for instance, in the book Lies, Damn Lies, and Statistics. A major issue is the comparing of numbers gathered in the past, and now, after some key conditions change.
Basic English 850 words |
566 | https://simple.wikipedia.org/wiki/New%20York%20City | New York City | New York, often called New York City (NYC), is the most populous city by population in the United States. It is at the southern end of the U.S. state of New York. Over 8 million people currently live in the city, and over 22 million people live in the bigger New York metropolitan area. It is the financial capital of the U.S. because it is home to the nation's stock market, Wall Street, and the One World Trade Center.
Being on one of the world's largest natural harbors, New York City is made up of five boroughs, each of which is a county of the state of New York. The five boroughs—Brooklyn, Queens, Manhattan, the Bronx, and Staten Island—were combined into one city in 1898. The city and its metropolitan area are an important place for legal immigration to the United States. As many as 800 languages are spoken in New York, making it the most linguistically diverse city in the world. New York has more than 3.2 million people born outside the United States, the biggest foreign-born population of any city in the world as of 2016.
New York City started as a trading post created by colonists from the Dutch Republic in 1624 on Lower Manhattan; the post was named New Amsterdam in 1626. In 1664, the English controlled the city and the areas around it, and were renamed New York after King Charles II of England gave the lands to his brother, the Duke of York. New York was the capital of the United States from 1785 until 1790, and has been the biggest U.S. city since 1790. The Statue of Liberty welcomed millions of immigrants as they came to the U.S. by ship in the late 19th and early 20th centuries, and it is a symbol of the U.S. and its ideals of liberty and peace. In the 21st century, New York has grew into a global hub of creativity and entrepreneurship and environmental sustainability, and as a symbol of freedom and cultural diversity. In 2019, New York was voted the best city in the world in a survey of over 30,000 people from 48 cities worldwide, because of its cultural diversity.
Many districts and landmarks in New York City are well known, including three of the world's ten most visited tourist places in 2013. A record 62.8 million tourists came to New York City in 2017. Times Square is the colorful area of the Broadway Theater District, one of the world's busiest pedestrian intersections, and a famous area for the world's entertainment industry. Many of the city's landmarks, skyscrapers, and parks are known around the world. Manhattan's real estate market is one of the most expensive in the world. New York has more Chinese people outside of China than anywhere in the world, with many Chinatowns across the city. The New York City Subway is the biggest single-operator rapid transit system worldwide, with rail stations. The city has over 120 colleges and universities, including Columbia University, New York University, Rockefeller University, and the City University of New York system, which is the biggest urban public university system in the United States. The world's two largest stock exchanges, the New York Stock Exchange, located on Wall Street in the Financial District of Lower Manhattan, and NASDAQ, headquartered in Midtown Manhattan, are both in Manhattan.
History
Name
In 1664, the city was named after the Duke of York, who would become King James II of England. James's older brother, King Charles II, had chosen the Duke proprietor of the former territory of New Netherland, including the city of New Amsterdam, which England had recently taken from the Dutch.
Early history
The oldest part of the city, the island of Manhattan, still has its original Lenape name. Although Native people such as the Lenape and Canaries had lived there for many thousands of years, New York City was first explored by Europeans in the 1500s. When Florentine explorer Giovanni da Verrazzano found the entrance to New York Harbor in the year 1524, he gave to this site the name of New Angoulême in the honor of Francois 1st. In 1609, the English explorer Henry Hudson rediscovered New York Harbor while looking for the Northwest Passage to the Orient for the Dutch East India Company. Hudson's first mate said it was "a very good Harbour for all windes" and the river was "a mile broad" and "full of fish".
Juan Rodriguez (transliterated to Dutch as Jan Rodrigues) was one of the first people associated with Europe to live there. He was a merchant from Santo Domingo. He was born in Santo Domingo of Portuguese and African descent, and he came to Manhattan during the winter of 1613–14. He trapped for pelts and traded with the local people as a representative of the Dutch. Broadway, from 159th Street to 218th Street in Upper Manhattan, is named Juan Rodriguez Way in his honor.
Dutch control
New York City was settled by Europeans from The Netherlands in 1624. The Dutch called the whole area of New York Netherland (New Netherland) and they named a fort and town on the south end of Brooklyn.
In 1626, the Dutch colonial Director-General Peter Minuit, acting for the Dutch West India Company, bought the island of Manhattan from the Canarsie, a small Lenape band. He paid "the value of 60 guilders" (about $900 in 2018). A false story says that Manhattan was bought for $24 worth of glass beads. 1626 was also the year the Dutch began to bring black slaves there.
After the purchase, New Amsterdam grew slowly. In 1647, Peter Stuyvesant started his job as the last Director-General of New Netherland. During this time, the number of people of New Netherland grew from 2,000 to 8,000.
Island New Amsterdam (New Amsterdam), after the capital city of the Netherlands, which was to become present-day New York. The English took over the colony in 1664 during the second Anglo-Dutch War. They changed the name to New York, to honor the Duke of York, who later became King James II of England and James VII of Scotland. The Dutch surrendered Nieuw Amsterdam without fighting.
English control
By the time the English took New York, there were many other Dutch towns in what would become New York City, including Breukelen (Brooklyn), Vlissingen (Flushing), and Nieuw Haarlem (Harlem). There were already some English towns in the area also, such as Gravesend in Brooklyn and Newtown in Queens. Dutch, English and other people had been living together in New York for a long time.
New York became more important as a trading port while under British rule in the early 1700s. It also became a center of slavery as the British increased the slave trade and built a slave market in the city. 42% of households owned slaves by 1730, the highest percentage outside Charleston, South Carolina.
The 1735 trial and acquittal in Manhattan of John Peter Zenger, who had been accused of seditious libel after criticizing colonial governor William Cosby, helped to create the freedom of the press in North America. In 1754, Columbia University was created under charter by King George II; it was called King's College, and it was in Lower Manhattan.
American Revolution
New York quickly grew to become a large and important port city. The Stamp Act Congress met in New York in October 1765, as the Sons of Liberty. It organized in the city, and they skirmished over the next ten years with British troops stationed there. The important Battle of Long Island of the American Revolution was fought in Brooklyn in 1776; it was the biggest battle of the war. The Americans lost the battle. The British used the area as its headquarters for the war in North America.
New York was the capital of the United States under the Articles of Confederation from 1785 to 1788. When the US Constitution was made, it stayed as the capital from 1789 until 1790. In 1789, the first President of the United States, George Washington, was inaugurated; the first United States Congress and the Supreme Court of the United States each met for the first time, and the United States Bill of Rights was written, all at Federal Hall on Wall Street. By 1790, New York grew bigger than Philadelphia, so it become the biggest city in the United States. By the end of 1790, because of the Residence Act, Philadelphia became the new capital.
Nineteenth century
During the nineteenth century, New York City's population grew from ~60,000 to ~3.43 million. The number of black people in New York City reached more than 16,000 in 1840. Even though slavery and the slave trade were abolished in New York, the slave trade continued illegally for many years.
The Great Irish Famine brought a many Irish immigrants; more than 200,000 were living in New York by 1860, more than a quarter of the city's population. There was also many people from German provinces, and Germans made up another 25% of New York's population by 1860.
During the American Civil War, many white people in the city supported the Confederate States of America, and July 1863 they killed many black New Yorkers in a riot.
Modern history
In 1898, the cities of New York and Brooklyn came together with the Bronx, Staten Island, and the western towns in Queens County to make Greater New York. This is the total area of the City of New York today. Around this time, many new immigrants came into New York City. They came in at Ellis Island, an island in New York's harbor near the Statue of Liberty. Many of them then moved to the Lower East Side neighborhood in Manhattan, which had over a million people living in just a few square miles.
Early in the twentieth century, with better transportation, more people moved to outer parts of the greater city, and many commuted to Manhattan. Many skyscrapers and other big buildings were put up to provide places to work.
In the 1970s, many jobs were lost due to industrial restructuring. This caused New York City to have economic problems and high crime rates. Though the financial industry grew, which greatly helped the city's economy in the 1980s, New York's crime rate continued to increase through that decade and into the beginning of the 1990s. By the mid 1990s, crime rates started to drop a lot due to different police strategies, better economic opportunities, gentrification, and new residents, both Americans and new immigrants from Asia and Latin America. Important new sectors, such as Silicon Alley, started in the city's economy. New York's population reached all-time highs in the 2000 census and then again in the 2010 census.
New York had most of the economic damage and biggest loss of human life from the September 11, 2001 attacks. Two of the four planes taken over that day were flown into the twin towers of the World Trade Center, destroying them and killing 2,192 civilians, 343 firefighters, and 71 police officers. The North Tower became the tallest building ever to be destroyed anywhere.
Hurricane Sandy brought a destructive storm surge to New York City on the evening of October 29, 2012, flooding numerous streets, tunnels and subway lines in Lower Manhattan and other areas of the city and cutting off electricity in many parts of the city and its suburbs.
Geography
During the Wisconsin glaciation, 75,000 to 11,000 years ago, the New York City area was at the edge of a big ice sheet over deep. Erosion and the ice moving lead to the creation of what is now Long Island and Staten Island. It also left bedrock at a shallow depth, providing a solid foundation for most of Manhattan's skyscrapers.
New York City is located in the Northeastern United States, in southeastern New York State, approximately halfway between Washington, D.C. and Boston. The city includes all of Manhattan Island and Staten Island, and the western end of Long Island. There are also many smaller islands.
Water divides several parts of the city. The Hudson River flows through the Hudson Valley into New York Bay. Between New York City and Troy, New York, the river is an estuary. The Hudson River separates the city from the U.S. state of New Jersey. Part of the Hudson River forms the border between Manhattan and the Bronx on one side, and the State of New Jersey on the other side. The East River forms the border between Manhattan on one side, and Brooklyn and Queens on the other side. The Harlem River forms the border between Manhattan and the Bronx (except for a small part of Manhattan that is on the mainland). Part of Long Island Sound separates the Bronx and Queens. Newtown Creek is part of the border between Brooklyn and Queens. Some parts of the city are very separate from the others because of water, such as Rockaway in Queens and City Island in the Bronx. A small piece of land in Manhattan is international territory and belongs to the United Nations Headquarters. The country of Somalia is the only country whose national flag copied the colors of the UN. The Bronx River, which flows through the Bronx and Westchester County, is the only entirely fresh water river in the city.
The city's total area is , including of land and of this is water. The tallest place in the city is Todt Hill on Staten Island. It is at above sea level, and it is the tallest place on the Eastern Seaboard that is south of Maine. The summit of the ridge is mostly woodland as part of the Staten Island Greenbelt.
The hallmark of New York city is its many skyscrapers, especially in Manhattan. In New York City there are about 5600 skyscrapers. 48 of them are over 200 metres tall, which is the highest number of skyscrapers in one area in the world.
Boroughs
New York City has five boroughs: Manhattan, Brooklyn, Queens, the Bronx, and Staten Island.
Manhattan
Manhattan (New York County) is the geographically smallest and most densely populated borough. It has Central Park and most of the city's skyscrapers. It is sometimes locally known as The City.
Brooklyn
Brooklyn (Kings County), on the western end of Long Island, has the most people living in it than any other borough. Brooklyn is known for its cultural, social, and ethnic diversity, an independent art scene, unique neighborhoods, and unique architecture.
Queens
Queens (Queens County), on Long Island north and east of Brooklyn, is geographically the biggest borough and the most ethnically diverse county in the United States. It is also the most ethnically diverse urban area in the world.
The Bronx
The Bronx (Bronx County) is New York City's northernmost borough. It is the only New York City borough with most of the land being on the mainland United States. The Yankee Stadium, the baseball park of the New York Yankees, and the biggest cooperatively owned housing complex in the United States, Co-op City, are in the Bronx. The Bronx Zoo, the world's largest metropolitan zoo, is also in the Bronx. It is big and has more than 6,000 animals. Rap and hip hop culture were created in the Bronx. Pelham Bay Park is the biggest park in New York City, at .
Staten Island
Staten Island (Richmond County) is the most suburban of the five boroughs. Staten Island is connected to Brooklyn by the Verrazano-Narrows Bridge. It is connected to Manhattan by way of the free Staten Island Ferry, a daily commuter ferry which has clear views of the Statue of Liberty, Ellis Island, and Lower Manhattan. In central Staten Island, the Staten Island Greenbelt is about big, including of walking trails and one of the last untouched forests in the city.
Climate
Under the Köppen climate classification, New York City experiences a humid subtropical climate (Cfa) and a humid continental climate (Dfa). The average temperature in January, the area's coldest month, is . However, temperatures in winter could for a few days be as low as and as high as . Summers are typically hot and humid with a July average of . New York City gets some snow in winter.
People
New York City currently has over 9 million people. Over 20 million people live in the New York metropolitan area including the city. The majority of the people in New York City belong to ethnic groups that are minorities in the US. New York City has had large numbers of immigrants for centuries. In the early 19th Century, they came from Ireland and Germany. Later in the 19th century, they came from Italy, Russia and Eastern Europe. Today, many are from Puerto Rico, Haiti, the Dominican Republic and Colombia. Other ethnic groups living in New York City are Turks, Indians, Mexicans, Filipinos, Eastern Europeans, Jamaicans, Trinidadians, Caribbeans and Chinese. New York City has one of the largest Hispanic and Latino population in the United States.
Economy
New York City is a global hub of business and commerce, as a center for banking and finance, retailing, world trade, transportation, tourism, real estate, new media, traditional media, advertising, legal services, accountancy, insurance, theater, fashion, and the arts in the United States. The Port of New York and New Jersey is also a big part of the economy. It received a record cargo volume in 2017, over 6.7 million TEUs. New York City's unemployment rate fell to its record low of 4.0% in September 2018.
Many Fortune 500 companies are headquartered in New York City, as are many multinational corporations. One out of ten private sector jobs in the city is with a foreign company. New York City has been ranked first among cities around the world in getting capital, business, and tourists. New York City's role as the top global center for the advertising industry can be seen with "Madison Avenue". The city's fashion industry has about 180,000 employees with $11 billion in annual wages.
Chocolate is New York City's biggest specialty-food export, with up to $234 million worth of exports each year. Entrepreneurs were creating a "Chocolate District" in Brooklyn , while Godiva, one of the world's biggest chocolatiers, continues to be headquartered in Manhattan.
Wall Street
New York City's biggest economic part is the U.S. financial industry, also known as Wall Street. The city's securities industry, which has 163,400 jobs in August 2013, continues to be the biggest part of the city's financial sector and an important economic part. In 2012, Walls Street made 5.0% of the city's private sector jobs, 8.5% ($3.8 billion) of its tax revenue, and 22% of the city's total wages, including an average salary of $360,700.
In Lower Manhattan, there is the New York Stock Exchange, on Wall Street, and the NASDAQ, at 165 Broadway, representing the world's biggest and second biggest stock exchanges, respectively. Investment banking fees on Wall Street totaled about $40 billion in 2012, while in 2013, senior New York City bank officers who manage risk and compliance functions earned as much as $324,000 every year. In fiscal year 2013–14, Wall Street's securities industry made 19% of New York State's tax revenue.
Many of the world's biggest media conglomerates are also in the city. Manhattan had more than 500 million square feet (46.5 million m2) of office space in 2018, making it the biggest office market in the United States. Midtown Manhattan, with 400 million square feet (37.2 million m2) in 2018, is the biggest central business area in the world.
Media and entertainment
WNBC NBC
WCBS CBS
WABC American Broadcasting Company
USA Network
Showtime (TV channel)
HBO
New York is an important place for the American entertainment industry, with many movies, television series, books, and other media being set there. , New York City was the second biggest center for filmmaking and television production in the United States, making about 200 feature films every year, making about 130,000 jobs. The filmed entertainment industry has been growing in New York, providing nearly $9 billion to the New York City economy as of 2015. By amount, New York is the world leader in independent film production—one-third of all American independent films are created there. The Association of Independent Commercial Producers is also based in New York.
New York City is also an important place for the advertising, music, newspaper, digital media, and publishing industries, and it is the biggest media market in North America. Some of the city's media conglomerates and companies include Time Warner, the Thomson Reuters Corporation, the Associated Press, Bloomberg L.P., the News Corporation, The New York Times Company, NBCUniversal, the Hearst Corporation, AOL, and Viacom. Seven of the world's top eight global advertising agency networks have their headquarters in New York. Two of the top three record labels' headquarters are in New York: Sony Music Entertainment and Warner Music Group. Universal Music Group also has offices in New York.
More than 200 newspapers and 350 magazines have an office in the city, and the publishing industry has about 25,000 jobs. Two of the three national daily newspapers with the biggest circulations in the United States are published in New York: The Wall Street Journal and The New York Times, which has won the most Pulitzer Prizes for journalism. Big tabloid newspapers in the city include The New York Daily News, which was created in 1919 by Joseph Medill Patterson, and The New York Post, created in 1801 by Alexander Hamilton. The city also has a many ethnic presses, with 270 newspapers and magazines published in more than 40 languages. El Diario La Prensa is New York's biggest Spanish-language daily newspaper, and it is the oldest in the United States. The New York Amsterdam News, published in Harlem, is a big African American newspaper. The Village Voice, historically the biggest alternative newspaper in the United States, announced in 2017 that it would end publication of its print version, and it will only publish online.
New York is also an important place for non-commercial educational media. The oldest public-access television channel in the United States is the Manhattan Neighborhood Network, created in 1971.
Education
The New York City Public Schools system, managed by the New York City Department of Education, is the biggest public school system in the United States. It serves about 1.1 million students in more than 1,700 different primary and secondary schools.
The New York City Charter School Center helps the creation of new charter schools. There are about 900 additional private secular and religious schools in the city.
College and university
More than 600,000 students are enrolled in New York City's more than 120 colleges and universities, which is the most of any city in the United States and more than other major global cities such as London, and Tokyo. More than half a million are just in the City University of New York (CUNY) system , including both degree and professional programs. New York City's colleges and universities had also higher average scores than those two cities in 2019, according to the Academic Ranking of World Universities. New York City has many famous private universities such as Barnard College, Columbia University, Cooper Union, Fordham University, New York University, New York Institute of Technology, Rockefeller University, and Yeshiva University; many of these universities are ranked as some of the best universities in the world.
Government
The mayor of New York is Eric Adams, a Democrat. The city also has a City Council that makes some local laws. Most laws in New York City are set by the state government in Albany.
Transportation
Subway transportation is provided by the New York City Subway system, one of the biggest in the world. Pennsylvania Station, the busiest train station in the United States, is here.
John F. Kennedy International Airport, which is in the Queens borough of New York, is one of the busiest airports in the United States.
Famous sights
References
Notes
Other websites
NYC Go, official tourism website of New York City
1620s establishments in the Thirteen Colonies
1624 establishments
17th-century establishments in New York
Former capitals of the United States |
569 | https://simple.wikipedia.org/wiki/October | October | October (Oct.) is the tenth month of the year in the Gregorian calendar, coming between September and November. It has 31 days. The name comes from the Latin octo for "eight". It was the eighth month of the year before January and February were added to the beginning of the year.
October begins on the same day of the week as January in common years, but does not begin on the same day of the week as any other month in leap years. October always ends on the same day of the week as February, and additionally, January in common years.
The Month
October is the tenth month of the year in the Gregorian calendar, coming after September and before November. It has 31 days. Its name comes from Latin octo, meaning eight, as it was the eighth month of the year in the Old Roman Calendar before January and February were added to the beginning of the year, though its name did not change. The tenth month at the time was December.
October is an Autumn (Fall) month in the Northern Hemisphere and a Spring month in the Southern Hemisphere. In each Hemisphere, it is the seasonal equivalent of April in the other.
October begins on the same day of the week as January in common years, but no other month in leap years begins on the same day of the week as October. October ends on the same day of the week as January in common years and February every year, as each other's last days are 39 weeks (273 days) and 35 weeks (245 days) apart respectively.
In common years, October starts on the same day of the week as May of the previous year, and in leap years, August of the previous year. In common years, October finishes on the same day of the week as May of the previous year, and in leap years, August and November of the previous year.
In years immediately before common years, October starts on the same day of the week as April and July of the following year, and in years immediately before leap years, September and December of the following year. In years immediately before common years, October finishes on the same day of the week as July of the following year, and in years immediately before leap years, April and December of the following year.
October is the month of the Rosary devotion.
October 31/November 1 is Samhain in old Pagan tradition. Several current observances at this time are believed to be related to it. They are: Halloween (October 31) in many western traditions, All Saints Day (November 1), All Souls Day (November 2), and the Day of the Dead (October 31 to November 2), which is celebrated in Mexico.
Holidays
Fixed Observances
October 1 National Day of the People's Republic of China
October 1 Independence Day (Nigeria)
October 1 National Day (Cyprus)
October 1 Independence Day (Tuvalu)
October 1 Independence Day (Palau)
October 1 International Day of Older Persons
October 2 Gandhi Jayanthi (India)
October 2 Guardian Angels Day
October 2 International Day of Non-Violence, birthday of Mahatma Gandhi
October 2 Independence Day (Guinea)
October 3 Unity Day (Germany)
October 3 Foundation Day (South Korea)
October 4 Independence Day (Lesotho)
October 4 World Animal Day
October 5 Republic Day (Portugal)
October 5 International World Teachers' Day
October 6 Armed Forces Day (Egypt)
October 7 Feast of Our Lady of the Rosary
October 8 Independence Day (Croatia)
October 9 Leif Erikson Day
October 9 Independence Day (Uganda)
October 10 National Day in the Republic of China (Taiwan)
October 10 Independence Day (Fiji)
October 11 National Coming Out Day (United States)
October 12 National Day of Spain
October 12 Independence Day (Equatorial Guinea)
October 16 World Food Day
October 18 Alaska Day
October 19 Constitution Day (Niue)
October 21 Apple Day
October 21 Trafalgar Day (United Kingdom)
October 23 Remembrance of the Hungarian Revolution (Hungary)
October 23 Chulalongkorn Day (Thailand)
October 24 United Nations Day
October 24 Independence Day (Zambia)
October 25 Day of the Romanian Army
October 25 Day of the Basque Country
October 25 Constitution Day (Lithuania)
October 25 Republic Day (Kazakhstan)
October 26 National Day of Austria
October 27 Independence Day (Saint Vincent and the Grenadines)
October 27 Independence Day (Turkmenistan)
October 29 Republic Day (Turkey)
October 31 Nevada Day
October 31 Protestant Reformation Day
October 31 Halloween
October 31/November 1 Samhain (an approximate date)
October 31 to November 2 Day of the Dead (Mexico)
Moveable Events
Jewish New Year, September/October
Munich Oktoberfest, runs from mid-September until around October 3
The Summer Paralympics have often taken place in this month.
The Nobel Prize winners of the year are announced in October
Northern Hemisphere: Harvest festivals take place around this time.
Second Monday in October:
Thanksgiving Day in Canada
Health and Sports Day in Japan
Columbus Day in the United States
Divali (Hinduism), takes place in October or November
Last Sunday in October: End of Daylight saving time in the EU; clocks are turned back one hour.
Selection of Historical Events
October 1, 1890 Yosemite National Park is created by United States Congress.
October 1, 1946 The Nuremberg Trials of leading Nazis ends.
October 1, 1949 The People's Republic of China is declared by Mao Zedong.
October 1, 1960 Nigeria becomes independent.
October 1, 1961 British and French Cameroon merge.
October 1, 1978 Tuvalu becomes independent.
October 1, 1994 Palau becomes independent from a UN Trusteeship, though remains dependent on US aid.
October 2, 1958 Guinea declares independence.
October 3, 1932 The Kingdom of Iraq is formed.
October 3, 1990 Germany is officially re-united.
October 4, 1957 The Soviet Union launches the Sputnik 1 probe into orbit.
October 4, 1966 Lesotho becomes independent.
October 5, 1910 Portugal becomes a Republic.
October 6, 1860 The Introduction of the so-called Section 377 of the British Indian penal code (Law) was enacted in British India respectively.
October 6, 1973 The Yom Kippur war begins as Egypt and Syria launch an attack on Israel.
October 6, 1981 President of Egypt Anwar Sadat is shot dead at a military parade.
October 6, 1987 Fiji becomes a Republic.
October 7, 1949 East Germany is founded.
October 9, 1962 Uganda becomes independent.
October 10, 1780 The Great Hurricane of 1780 kills 20,000 to 30,000 people in the Caribbean.
October 10, 1928 Chiang Kai-shek becomes leader of the Republic of China.
October 10, 1970 Fiji becomes independent.
October 10, 2010 The Netherlands Antilles are split up.
October 12, 1492 Christopher Columbus reaches the Caribbean.
October 12, 1871 The Introduction of the so-called Criminal Tribes Act was an enacted extension in British India respectively.
October 12, 1968 Equatorial Guinea becomes independent.
October 12, 1999 The population of the world is said to have officially reached six billion.
October 13, 2010 Successful rescue of 69 miners trapped underground near Copiapo, Chile.
October 14, 1066 The Battle of Hastings results in William the Conqueror taking over England.
October 14, 1964 Martin Luther King, Jr. wins the Nobel Peace Prize.
October 14, 1981 Hosni Mubarak becomes President of Egypt.
October 14, 1991 Aung San Suu Kyi wins the Nobel Peace Prize.
October 15, 1917 Dutch exotic dancer Mata Hari is executed for espionage in France.
October 16, 1582 Spain, Portugal, Italy and Poland switch from the Julian calendar to the Gregorian calendar.
October 16, 1978 Pope John Paul II becomes Pope, remaining in this position until 2005.
October 17, 1989 The Loma Prieta earthquake strikes the San Francisco Bay Area.
October 18, 1867 Alaska officially changes from Russian to US control.
October 18, 1898 The US takes control of Puerto Rico.
October 18, 1989 Leader of East Germany Erich Honecker resigns.
October 20, 1973 Sydney Opera House in Sydney, Australia, is officially opened.
October 20, 2011 2011 Libyan civil war: Colonel Muammar al-Gaddafi is killed.
October 21, 1805 The naval Battle of Trafalgar ends in British victory, although Admiral Horatio Nelson is killed.
October 22, 1962 The Cuban Missile Crisis begins.
October 23, 1956 The Hungarian Uprising begins.
October 24, 1945 The UN is officially founded.
October 24, 1964 Zambia becomes independent.
October 26, 1905 Norway becomes independent from Sweden.
October 26, 1955 Austria declares 'Permanent Neutrality'.
October 27, 1962 The Cuban Missile Crisis ends.
October 27, 1979 Saint Vincent and the Grenadines becomes independent.
October 27, 1991 Turkmenistan becomes independent from the Soviet Union.
October 28, 1886 The Statue of Liberty is officially dedicated near New York City, as a gift to the United States from France.
October 29, 1923 The Republic of Turkey is officially declared by Mustafa Kemal Atatürk.
October 29, 1929 The Wall Street crash occurs, starting the Great Depression.
October 29, 1998 Hurricane Mitch causes much destruction in Central America.
October 31, 1517 Protestant Reformation: Martin Luther is believed to have nailed his 95 theses to Wittenberg Castle Church in Germany on this date.
October 31, 1984 Prime Minister of India Indira Gandhi is shot dead by two Sikh security guards. Riots against the Sikh population start soon after.
October 31, 2011 The population of the world is said to have officially reached seven billion on this date.
Trivia
October has the 300th day of the year. October 27 in a common year, October 26 in a leap year.
Because Daylight Saving Time ends in October in some Northern Hemisphere countries, it is sometimes seen as the "longest" month there.
In a common year, October 31 falls on the same day of the week as February 28 while in a leap year, it falls on the same day of the week as February 29.
October 1 is the only day in October to start within the third quarter of the calendar year.
This month is tied with November as the months with the most births of US Presidents as of January 20, 2021: with six - Jimmy Carter (October 1), Rutherford B. Hayes (October 4), Chester A. Arthur (October 5), Dwight D. Eisenhower (October 14), Theodore Roosevelt (October 27) and John Adams (October 30).
October's flower is the Calendula.
One of October's birthstones is the opal. The meaning of the opal is hope. The other birthstone of October is the pink tourmaline.
The astrological signs for October are Libra (September 22 to October 21) and Scorpio (October 22 to November 21).
References
Other websites
Octobre in easy French
10 |
570 | https://simple.wikipedia.org/wiki/Of | Of | Of is a preposition used in the English language to show a possessive relationship. For example, the phrase "book of maps" means that the book has maps. The phrase "father of Mike" means the father that is being mentioned is Mike's father.
Basic English 850 words |
571 | https://simple.wikipedia.org/wiki/1%20%28number%29 | 1 (number) | One (1) is the first natural number, followed by two. The Roman numeral for one is I.
Mathematics
In mathematics, 1 is the multiplicative identity. It is sometimes called the "unity". It is also the only number for which these special facts are true:
Any number multiplied by 1 equals that number: . For example, .
Any number , except 0, multiplied by its reciprocal equals 1: . For example, .
Any number divided by 1 equals that number: . For example, .
Any number , except 0, divided by itself equals 1: . For example, .
1 divided by any number , except 0, equals the number's reciprocal: . For example, .
1 divided by any number 's reciprocal, except 0's, equals that number: . For example, .
Any number to the power of 1 equals that number: . For example, .
1 to the power of any number equals 1: . For example, .
1 cannot be divided by any other number bigger than itself so that the result is a natural number.
In mathematics, 0.999... is a repeating decimal that is equal to 1. Many proofs have been made to show this is correct.
Computer science
The number one is important for computer science, because the binary numeral system uses only 1s and 0s to represent numbers. In machine code and many programming languages, one means "true" (or "yes") and zero means "false" (or "no").
Other meanings
In Germany and Austria, one is the grade for "very good". It is the best grade of six possible grades in Germany, and the best of five possible grades in Austria. In the Netherlands, one is the lowest grade, and ten the highest. In Poland, one is also the lowest grade, and the highest is six.
In numerology, the number one is a symbol for everything (unity), the beginning, and God.
Related pages
Zero
Mathematical constant
References
Integers
Square numbers |
572 | https://simple.wikipedia.org/wiki/O%20Canada | O Canada | "O Canada" () is the national anthem of Canada. Calixa Lavallée wrote the music, and Adolphe-Basile Routhier wrote the words in French. It was first sung in French in 1880. Robert Stanley Weir wrote the English words for the song, which are not a translation of the French lyrics, in 1908.
It was sung as the national anthem for many years before the government made it official on 1 July (Canada Day) in 1980.
"O Canada" has been translated into many languages. Some of these languages are spoken by people living in Canada, but they trace their roots in other parts of the globe. These languages include Chinese, Japanese, German, Spanish, Italian, Punjabi, Russian, and Ukrainian. The song has also been translated into indigenous languages (languages spoken by First Nations), such as Inuktitut, Ojibwe, Cree, and Mi'kmaq.
Lyrics
English lyrics
French lyrics
Multilingual versions
Translations into indigenous language
1880s songs
North American anthems
National symbols of Canada |