AcharyaChanakya/simple-wikipedia huggingface dataset:
When the penal colony closed in 1877 the area was renamed "Carnavon". During the 1880s the was sold and a small town was started. Many buildings were pulled down and the bricks sent to make new buildings in Hobart. Fires burned the area in 1895 and 1897 and ruined many of the old prison buildings. Some buildings were changed for the new town to make a post office and town hall.
Tourism started as soon as the prison closed. This brought money into the new town. Some of the old convicts gave guided tours of the prison. In 1927 tourism had grown so much the area's name was changed back to Port Arthur. 1916 saw the start of the Scenery Preservation Board (SPB) which looked after the Port Arthur site. By the 1970s the National Parks and Wildlife Service took over the site.
In 1979 the government gave money to protect the site as a tourist area, because of its historical importance. The post office and town hall of Port Arthur were moved to nearby Nubeena. Several grand sandstone buildings, built by convicts were cleaned up. These buildings include the Separate Prison, the Round Tower, the church, and the remains of the main prison building. The buildings are surrounded by green grass.
The mass graves on The Island of the Dead also attract visitors. The air about the small bush-covered island is described as being sad and peaceful by visitors.
Tourists can either walk around the area themselves, or go on a guided tours. There are also late night ""ghost tours"". There is a museum, with written records, tools, clothing and other interesting things from convict times.
Since 1987 the site has been managed by the Port Arthur Historic Site Management Authority, paid for by the Tasmanian Government.
On 28 April 1996, Martin Bryant killed 35 people and hurt 37 others at Port Arthur. He was captured by the police. This is now called the Port Arthur massacre. This led to a national ban on semi-automatic shotguns and rifles. It also made a link between the Port Arthur and Dunblane, a Scottish town which also had a shooting that year.
In Greek mythology, Odysseus was the great grandson of the Greek god Hermes. He was the king of the island Ithaca. He was married to Penelope. Odysseus and Penelope had a son called Telemachos. Odysseus is a major character in Homer's "Iliad" and "Odyssey".
Odysseus fought in the Trojan War. He invented the Trojan Horse, which helped the Greeks win the war. After the war, his adventurous journey home took 10 years. The story of that journey is told in the "Odyssey". Odysseus angered Poseidon, the god of seas, when he half blinded his cyclops son Polyphemos. In anger, Poseidon stopped him from leaving the island. The Latin name for Odysseus is "Ulysses".
There have been many movies about Odysseus, because of his heroic and intelligent battle strategies.
Cast iron is an alloy of iron. The term is usually used for grey cast iron. There are two main types of cast iron: "grey cast iron" and "white cast iron". The differences between the two are mainly based on the amount of silicon in the alloy. All cast iron has about 95% iron in it. Grey cast iron has 3% silicon and 2% carbon. White cast iron has less silicon.
The silicon in grey cast iron causes the carbon to change into graphite. This causes it to have a dark grey or almost black color. With less silicon, the carbon in white cast iron changes to cementite or "iron carbide" (FeC). This causes white fractures to form on the surface and give white cast iron the name.
Grey cast iron is very good at conducting heat. Because of this, it is often used to make cookware.
Incest means sexual intercourse between people who are closely related. Usually, this means members of the same family. In many societies, it is forbidden by law and religion. Which relatives it is forbidden to have sex with depends on the law, religion and culture. If pregnancy is a risk, there may be reasons based on health. Children that result from incest between blood relatives are more likely to have birth defects.
The exact definition of the incest relationship varies. In some societies it is immediate relations, such as parents and their children; or brothers and sisters of the same parents. It sometimes includes extended family like aunts, nephews, nieces and uncles. That way, intercourse between cousins is legally permitted in the large majority of the world, but is disliked in many countries. In some U.S. states, such as Texas, the legal definition of incest includes first cousins, but not second cousins. A person who engages in incest is called an "incestophile" or "incestualist".
Other societies define it much more widely, to include all "blood relatives", or all who live in the same household, or belong to the same clan. Some religions say that sex between people related by marriage is incest. For example, the Old Testament forbids sex between siblings-in-law. In South Africa, sex between a parent-in-law and child-in-law is illegal.
The type of incest most often reported in the Western world is father-daughter incest. Incest between adults and children is a form of child sexual abuse. This form has been shown to cause one of the worst forms of childhood trauma, a trauma that often causes serious and long-term psychological damage, especially in the case of parental incest. Stepparents are more likely to abuse stepchildren than biological parents are to abuse their children, because people typically care about their own children more than they care about their stepchildren the Cinderella effect. It is suggested that the Westermarck effect prevents a person being attracted to anyone whom he lived in the same house as during his childhood, hence most people are never sexually attracted to their siblings or parents.
The term is often used to apply to less serious sexual relationships between related people. It is difficult to say how frequent incest is, but researchers have estimated that between 10% and 15% of people have at least one "incest experience" (this means some kind of sexual relationship falling short of actual incest). Less than 2% of these involve intercourse or attempted intercourse. Among women, research by Russell (1986) and Wyatt (1985) has given estimates as high as twenty percent (for such 'incest experience'). In a survey of women in San Francisco, of those who had grown up with a stepfather, 17% (1 in 6) said that he sexually abused her. In the same study, 2.5% (1 in 40) of the women said that they had been sexually abused by their father. Cousincest refers to incest with a cousin. Siblingcest refers to incest with a sibling.
Incest between consenting adults is very rare, or rarely reported. Willing incest between adults is a crime in most countries. It is seen by some as a victimless crime. A reason why it is prohibited is because severely handicapped children are often born to parents who are blood-related. Other reasons for it being illegal are religion and to try to prevent sexual predation.
Most societies have some form of incest avoidance. The incest taboo is and has been one of the most common of all cultural taboos, both in current nations and many past societies, with legal penalties imposed in some jurisdictions. Most modern societies have legal or social restrictions on closely consanguineous marriages. However, in some societies, such as that of Ancient Egypt, brother–sister, father–daughter, and mother–son relations were practiced among royalty. In addition, the Balinese and some Inuit tribes have altogether different beliefs about what constitutes illegal and immoral incest.
The Canterbury Tales is a book of stories written by Geoffrey Chaucer. It was written in the 14th century. It was one of the first books to be written in Middle English. The book is about a group of pilgrims travelling from London to Canterbury. As they travel along, each person tells a story to pass the time. Chaucer planned to write 120 stories, with each person telling two stories on the way there and two on the way back. However, only 23 were completed, and one was partially finished. Two of the stories are written in prose. The others are written in verse. They were so popular that he was invited to read his stories to the king and royal court.
"The Canterbury Tales" is about a group of people who are pilgrims. They are travelling to an important sacred site. In the Middle Ages, many Christian people went on pilgrimages to Jerusalem, Rome, Santiago de Compostela and Canterbury. Canterbury Cathedral was a famous pilgrimage site because it contained the "shrine" (a place for remembering) of Saint Thomas Becket.
Thomas Becket had been the Archbishop of Canterbury in the 1100s. He had an argument with his old friend, King Henry II, and in 1170 he was murdered by some of the King's knights on order from the King. The King felt very sad and guilty. He had a magnificent tomb built for his old friend.
People began to visit the tomb. Soon, some people said that Thomas Becket was a saint, and that his bones could work miracles. He is regarded as a martyr for the Christian faith and as a saint by both the Roman Catholic and Anglican churches. In the late Middle Ages his shrine made Canterbury one of the four most important pilgrimage places in Europe.
Many pilgrims used to meet together in London. "The Canterbury Tales" tells of the meeting of a group at an inn in Southwark, which was a village south of the Thames River and now making up part of London. This was a good place to meet because people from the north could cross the Thames River by London Bridge.
Canterbury is in the south-east of England. Pilgrims used to gather in groups because it was dangerous to travel alone. In the days before modern banking, every traveller had to carry a lot of money to pay for food and accommodation (a place to sleep). Robbers often attacked people along the roads.
When pilgrims gathered in a group, the group could be made up of many different kinds of people, both rich and poor, noble and humble. The groups often contained a number of religious people such as priests, monks and nuns. In Chaucer's story, the most noble person is a knight.
"The Canterbury Tales" begins with a Prologue (which means "a few words to begin"). In the prologue Chaucer describes the time of year, which is April, when the weather begins to get warmer after winter. He says that it is at this time that people begin to go on pilgrimage. Chaucer tells the reader about the people who are gathered at the inn. He describes the people so clearly that many of them have become famous characters in English Literature, and have often been shown in paintings. Chaucer describes how each person tells a story to entertain the other as they travel along.
The Tales are:
Some of the tales (stories) are serious and others are funny. Some of the funny stories are vulgar (sexually rude). A lot of the tales talk about the Christian faith. Sometimes the "theme" (main idea) of one story is followed into the next story, as a new story-teller responds (or answers) to a story they have just heard. All of the tales are about the way that people think and behave towards each other.
"The Canterbury Tales" is written in the type of English that most ordinary people used in Chaucer's day. Chaucer was one of the first authors (writers) who wrote stories in English. Before, stories were written in Latin or French. Some other writers of Chaucer's time also wrote in English. Some of these writers were John Gower, William Langland, and the Pearl Poet.
Chaucer planned the stories before he wrote them but he did not finish his plan. He planned that each character would tell four stories: two while going to Canterbury and two while returning to London. If Chaucer had finished, he would have written 120 stories. He only actually wrote 24. Chaucer began to write the stories in the 1380s. He stopped writing them in the 1390s. Some think that he deliberately did not write the total 120 stories.
Chaucer was an important person in the royal court. Some people think that, in the stories, Chaucer was saying things about court politics. Some people think that Chaucer based his characters on people that he really knew and who were at the royal court.
Some people think that Chaucer copied ideas from others peoples’ writings because some of the stories in "The Canterbury Tales" are very similar to them. The characters, however, are very different. The characters have different occupations and personalities. They all tell different types of stories and they tell them in different ways.The big story is about many pilgrims traveling to Canterbury. They are riding horses and the trip takes several days. Chaucer does not say much about the big story and most of the writing is about the stories told by the pilgrims.
The two earliest manuscripts (hand-written copies) of "The Canterbury Tales" are the Hengwrt manuscript and the Ellesmere manuscript. There are also 84 manuscript and four printed copies of "The Canterbury Tales" that were made before 1500. There are quite a lot of differences in the different copies. Some experts on Chaucer have started The "Canterbury Tales Project". The project is to read all these copies of "The Canterbury Tales", find out the differences and write the most accurate copy.
With the exception of the Innkeeper/host Harry Bailey, the various manuscripts of The Canterbury Tales had various drawings of each of the Pilgrims who told a tale; other Pilgrims mentioned who did not tell a tale or who were illustrated were the knight's yeoman, a haberdasher, a carpenter, a weaver, a dyer, a tapestry weaver; a plowman. The original intenent was that each pilgrim was to tell two tales to Canterbury and two on the way back for a free meal; that would have been an estimated 120 tales-instead of the 23 in the book. Indeed, the only Pilgrim who tells two tales is Chaucer himself: Sir Thopas [unfinished] and Tale of Melibee.
North Reading Room, west wall. Detail of mural by Ezra Winter illustrating the characters in the Canterbury Tales by Geoffrey Chaucer. Library of Congress John Adams Building, Washington, D.C
Sweat, or perspiration, is a liquid made by the skin when the body is hot. Sweat is made in sweat glands under the surface of the skin. It comes out of tiny holes in the skin called pores. Sweat is mostly water, but it also contains some salts.
The body makes sweat to cool itself down. It is part of the body's thermoregulation. The sweat takes the heat from the body when it evaporates (turns to gas).
Some people think sweat makes a person smell bad. Many people use special sprays to stop this from happening. Deodorants hide the odor of sweat. Anti-perspirants stop the body from sweating.
The sweat glands in our skin contains two different groups of sweat glands: apocrine sweat glands and merocrine sweat glands.
Perspiration, or sweat, is your body's way of cooling itself, whether that extra heat comes from hardworking muscles or from overstimulated nerves. The average person has over 4 million sweat glands in their skin. Sweat glands are distributed over the entire body, except for the lips, nipples and external genital organs. The sweat gland is in the layer of skin called the dermis along with other "equipment," such as nerve endings, hair follicles and so on.
The sweat gland is a long, coiled, hollow tube of cells. The coiled part in the dermis is where sweat is made, and the long part is a duct that connects the gland to the opening or pore on the skins's outer surface. Nerve cells from the sympathetic nervous system are connected to the sweat glands. There are two types of sweat glands:
We are constantly sweating, even though we may not notice it. Sweating is your body's major way of getting rid of excess body heat, which is produced by metabolism or working muscles. The amount of sweat produced depends upon our states of emotion and physical activity. Sweat can be made in response to nerve stimulation, hot air temperature, and/or exercise. First, let's concentrate on how sweat is made in an eccrine sweat gland.
When the sweat gland is stimulated, the cells secrete a fluid (primary secretion) that is similar to plasma -- that is, it is mostly water and it has high concentrations of sodium and chloride and a low concentration of potassium -- but without the proteins and fatty acids that are normally found in plasma. The source of this fluid is the spaces between the cells (interstitial spaces), which get the fluid from the blood vessels (capillaries) in the dermis. This fluid travels from the coiled portion up through the straight duct. What happens in the straight duct depends upon the rate of sweat production or flow:
Sweat is produced in apocrine sweat glands in the same way. However, the sweat from apocrine glands also contains proteins and fatty acids, which make it thicker and give it a milkier or yellowish color. This is why underarm stains in clothing appear yellowish. Sweat itself has no odor, but when bacteria on the skin and hair metabolize the proteins and fatty acids, they produce an unpleasant odor. This is why deodorants and anti-perspirants are applied to the underarms instead of the whole body.
The maximum volume of sweat that a person who is not adapted to a hot climate can produce is about one liter per hour. Amazingly, if you move to a hot climate such as the American desert southwest or the tropics, your ability to produce sweat will increase to about two to three liters per hour within about six weeks! This appears to be the maximum amount that you can produce.
When sweat evaporates from the surface of your skin, it removes excess heat and cools you. This is actually due to a neat principle in physics, which goes like this. To convert water from a liquid to a vapor, it takes a certain amount of heat called the heat of vaporization. This heat energy increases the speed of the water molecules so that they can escape into the air. For water, this value is 540 calories/gram or 2.26 x 106 joules/kilogram. So, if you can produce one liter of sweat, which is equal to 1000 g or 1 kg (density of water is 1 g/ml or 1 kg/l) in one hour, then 540,000 calories of heat can be removed from your body. This is an extreme example using the maximum amount of sweat that a person can make. Typically, all of the sweat does not evaporate, but rather runs off your skin. In addition, not all heat energy produced by the body is lost through sweat. Some is directly radiated from the skin to the air and some is lost through respiratory surfaces of the lungs.
A major factor that influences the rate of evaporation is the relative humidity of the air around you. If the air is humid, then it already has water vapor in it, probably near saturation, and cannot take any more. Therefore, sweat does not evaporate and cool your body as efficiently as when the air is dry.
Finally, when the water in the sweat evaporates, it leaves the salts (sodium, chloride and potassium) behind on your skin, which is why your skin tastes salty. The loss of excessive amounts of salt and water from your body can quickly dehydrate you, which can lead to circulatory problems, kidney failure and heat stroke. So, it is important to drink plenty of fluids when you exercise or are outside in high temperatures. Sports drinks contain some salts to replace those lost in the sweat.
Sweating responds to emotional state. So when you are nervous, anxious or afraid, there is an increase in sympathetic nerve activity in your body as well as an increase in epinephrine secretion from your adrenal gland. These substances act on your sweat glands, particularly those on the palms of your hand and your armpits, to make sweat. Thus, you feel a "cold" sweat. Also, the increased sympathetic nerve activity in the skin changes its electrical resistance, which is the basis of the galvanic skin response used in lie detector tests.
Excessive sweating usually occurs on the palms of the hand or the armpits. If it is not caused by emotional or physical activity it is called "diaphoresis" or hyperhidrosis. It is often an embarrassing condition. The cause or causes are unknown. The condition may be due to the following:
The condition can be treated.
Adult Swim
Adult Swim (stylized as [adult swim] or shortened to [as]) is an American adult-oriented nighttime programming block of the basic cable network Cartoon Network that is programmed by its in-house production studio, Williams Street. Marketed as a separate network for ratings purposes, Adult Swim broadcasts nightly from 8 p.m. to 6 a.m. ET/PT.
Debuting in 2001, Adult Swim serves as the nighttime identity of Cartoon Network, and it was established as alternative programming during late night hours when Cartoon Network's primary target audience would normally be sleeping. By 2005, Adult Swim would be granted its own separate Nielsen ratings report from Cartoon Network due to it targeting a different audience. The block features stylistically varied animated and live-action shows, including original programming, syndicated series, anime, original video animations, and short films with generally minimal or no editing for content.
Adult Swim has frequently aired adult animation features, mockumentaries, sketch comedy, and pilots. The block's shows are known for their sexual themes, frank sexual discussion, nudity, strong language, and graphic violence. Many of its programs are aesthetically experimental, transgressive, improvised, and surrealist in nature. Adult Swim has contracted with various studios known for their productions in absurd and shock comedy.
WESC
Ozámiz
Ozámiz is a city in the Philippines, in the province of Misamis Occidental. There were 141,828 people living there according to the 2015 census.
Ozámiz is named after Senator José F. Ozámiz, a hero of the Philippine resistance against the Japanese during World War 2.
Tillage
Yarmouth
Yarmouth could mean one of the following places.
In Canada:
In England:
In the United States:
Spleen
The spleen is an organ in vertebrates. The spleen is part of the lymphatic system. In people, it is on the left side of the body, under the heart. The spleen helps fight infections and keeps the blood cells healthy.
The spleen cleans out old blood cells from the blood and recycles them. It helps save the iron and the amino acids from the old blood cells. The spleen also holds a supply of extra blood, in case the body needs some quickly. The spleen works together with the circulatory system (the system which brings blood to the body).
A study published in 2009 using mice found that the spleen is a reservoir which holds over half the body's monocytes. These monocytes move to injured tissue (such as the heart after myocardial infarction), turn into dendritic cells and macrophages, and promote tissue healing. The spleen is rather like a large lymph node. Its absence makes certain infections more likely.
The spleen is shaped like a loose fist. It is tucked under the left side of the diaphragm, close by the heart.The average adult spleen weighs 0.44 lbs.
The spleen can get bigger when a person is digesting food or is sick. If a person's spleen gets big enough, it can break open. If this happens, the person needs medical care right away. Emergency surgery might be needed to control the bleeding.
Some of the diseases that cause the spleen to get bigger are:
In the past, many people believed the spleen helped control emotions. For example, if a person was upset or angry, people would think it was because of a spleen problem.
Placenta
The placenta is a temporary organ found in eutherian female mammals while they are pregnant.
The placenta is connected to the fetus by the umbilical cord, which is made of blood vessels and connective tissue. When the fetus is delivered, the placenta is delivered afterwards. The placenta is often called the afterbirth.
One of the placenta's jobs is to make sure blood from the mother and fetus never mixes. The placenta acts as an exchange surface between the mother and the fetus. Nutrients and oxygen are passed over by diffusion only. If the mother's and fetus's blood mixed, it could be deadly for both of them. If the mother and the fetus had different blood types, they might both die if their blood mixed.
The placenta has two parts, one of which is genetically and biologically part of the fetus, the other part of the mother. It is implanted in the wall of the uterus, where it receives nutrients and oxygen from the mother's blood and passes out waste. This forms a barrier called the placental barrier, which filters out some substances which could harm the fetus.
However, the placental barrier is not able to protect the fetus from everything that could hurt it. For example, alcohol goes through the placental barrier into the fetus. This is why drinking alcohol during pregnancy can cause Fetal Alcohol Syndrome. The placenta is also unable to filter out many other things. Chemicals that can cross the placental barrier and hurt the fetus are called teratogens.
Some infectious diseases may also cross this barrier and infect the fetus.
Prototherial (egg-laying) and metatherial (marsupial) mammals produce a type of placenta that provides nutrients mostly from the egg sac, instead of from the mother's blood. It is positioned in the female's body similar to eutherian mammals. Some snakes and lizards have evolved a system of internal development with a placenta-like tissue: this is an example of convergent evolution.
Glorious Revolution
The Glorious Revolution was an event in the history of England and Scotland in 1688. The people of England and Scotland did not like the Catholic King James II because he would not let them vote or practice the religion of their choice. They invited the Protestant William III of Orange-Nassau to take over as king. William was King James II's nephew and Mary's first cousin. He came to England with his wife Queen Mary, the daughter of King James II. They let the old king escape, and he moved to France out of fear.
William signed the "Bill of Rights" and became king, and England became a constitutional monarchy.
On the surface, this is a story about religion. However, it is also about the balance between monarch and Parliament. A civil war had been fought because Charles I tried to rule as an absolute monarch. Charles II had been accepted back because he agreed to limit his powers. However, his brother, James II, made it clear he wanted to get back the absolute power that their father Charles I had.
When Charles II died without any legitimate children in 1685, his brother the Duke of York became King as James II in England and Ireland. He also became James VII in Scotland. He tried to give freedom of religion to non-Anglicans. He did this by making the acts of Parliament invalid by Royal Decree. The public did not like this. Several Protestant politicians and noblemen began talking with Mary's husband as early as 1687. In May 1688, James forced Anglican clergymen to read the Declaration of Indulgence. The Declaration of Indulgence was a statement that gave religious freedom to those who did not agree with the Church of England. This made him much less popular.
Protestants became even more fearful when James's wife, Mary of Modena, gave birth to a son–James Francis Edward–in June 1688. They were afraid because the son, unlike Mary and Anne, would be raised a Roman Catholic. Some said that the boy had been secretly carried into the Queen's room in a bed-warming pan instead of her stillborn baby. There was no strong proof to support this story, but Mary publicly doubted the boy's legitimacy. She sent a list of suspicious questions to her sister, Anne, about the boy's birth.
On 30 June, the Immortal Seven secretly asked William, who was in the Netherlands with Mary, to come to England with an army. William, who was jealous of Mary's position and power, did not want to go at first. But Mary told William that she did not care about political power. She said "she would be no more but his wife, and that she would do all that lay in her power to make him King for life".
William agreed to attack. He declared that James' newborn son was the "pretended Prince of Wales". He also gave a list of what the English people wanted, and said that he only wanted to have "a free and lawful Parliament assembled". The Dutch army, which had been turned back by a storm in October, landed on 5 November. The English Army and Navy went over to William. At this time, the English people's confidence in James was very low. They did not even try to save their King. On 11 December, the King tried to run away, but failed. He tried to run away again on 23 December. This second attempt was successful, and James escaped to France. He lived there in exile until his death.
Though Mary was sad because of the deposition of her father, William ordered her to look happy when they arrived in London. Because of this, people thought she was being cold to her father. James also thought his daughter was unfaithful to him. This hurt Mary deeply.
In 1689, a Convention Parliament called by the Prince of Orange came together to discuss what they should do. William of Orange felt uncomfortable about his position. He wanted to rule as a King, not simply as a husband of a Queen. The only example of joint monarchy was from the sixteenth century. This was Queen Mary I and the Spanish Prince Philip. When they married, it was agreed that Prince Philip would take the title of King. But Philip II was King only during his wife's lifetime. He also did not have much power. William wanted to remain King even after his wife's death. Some important people suggested making Mary the only ruler. But Mary, who was faithful to her husband, refused.
On 13 February 1689, Parliament passed the Declaration of Right. In this declaration, it said that James, by trying to run away on 11 December 1688, had abandoned the government, so no one at the time was king. Normally, James's oldest son, James Francis Edward would have been the heir. However, Parliament offered the crown to William and Mary as joint Sovereigns instead. But it was added that "The sole and full exercise of the regal (royal) power be only in and executed by the said Prince of Orange in the names of the said Prince and Princess during their joint lives." The declaration was later extended to take out all Catholics. This was because "It hath been found (discovered) by experience that it is inconsistent (not in harmony) with the safety and welfare of this Protestant kingdom to be governed by a papist prince".
William and Mary were crowned together at Westminster Abbey on 11 April 1689. The Archbishop of Canterbury usually performed coronations. But William Sancroft, the Archbishop at that time, felt that James II's removal had been wrong. Therefore, the Bishop of London, Henry Compton, crowned them instead. On the day of the Coronation, the Convention of the Estates of Scotland declared at last that James was no longer King of Scotland. William and Mary were offered the separate Scottish Crown. This was because the two kingdoms were not united until the Acts of Union in 1707. They accepted on 11 May.
Even after this was declared, there was still strong support for James in Scotland. John Graham of Clevehouse, the Viscount of Dundee, raised an army and won a victory at Killiecrankie on 27 July. But Dundee's army suffered great losses, and he was seriously wounded at the start of the battle. This stopped the only effective resistance to William, and the revolt was quickly crushed. The next month, there was a great defeat at the Battle of Dunkeld.
Electromagnetism is the study of the electromagnetic force, one of the four fundamental forces of nature. The electromagnetic force pushes or pulls anything that has an electric charge, like electrons and protons. It includes the electric force, which pushes all charged particles, and the magnetic force, which only pushes moving charges.
The electromagnetic force comes from something called an electromagnetic field. In physics, a field is how we keep track of things that might change in space and time. It is like a set of labels for every point in space. For instance, the air temperature in a room could be described by a field, where the labels are just numbers saying how hot it is at that point in the room. We could have more complicated labels as well. On a map of wind speeds, the label could be a number saying how strong the wind is and also an arrow saying which way it is blowing. We call this a vector field because each label is a vector - it has a direction (the arrow) and a magnitude (its strength).
Electric and magnetic fields are also fields. Instead of keeping track of temperature or wind speed, they tell us how much push or pull a charged particle will feel at that point in space, and which direction it will be pushed. Like wind speeds, electric fields are also vector fields, so they can be drawn as arrows. The arrows point which way a positive particle, like a proton, will be pushed if it is in the field. Negative particles, like electrons, will go in the opposite direction as the arrows. In an electric field, arrows will point away from positive particles and towards negative ones. So a proton in an electric field would move away from another proton, or towards an electron. Similar charges repel (push away from each other), while opposite charges attract (are pulled together).
Magnetic fields are a little different. They only push on moving charges, and they push more on charges that are moving faster. But they do not push at all on charges that are sitting still. However, a changing magnetic field can produce an electric field, and an electric field can push on any charges. This idea, called electromagnetic induction, is used to make electric generators, induction motors, and transformers work. Together, electric and magnetic fields make up the electromagnetic field.
Before 1800, people thought that electricity and magnetism were two different things. However, this changed during the 19th century when scientists like Hans Christian Ørsted and Michael Faraday proved that electricity and magnetism are actually connected. In 1820, Ørsted found that when he turned the electric current from a battery on and off, it moved the needle on a nearby compass. When he studied this effect more carefully, he discovered that the electric current was producing a magnetic field. That is, when electric charges are moving, they can produce a force that pushes on magnets. Ørsted had found one of the first connections between electricity and magnetism.
Faraday continued studying this connection, running tests with loops of wire and magnets. He found that if he set up two loops of wire and ran electricity through just one of them, he could (for a little while) produce an electric current in the other loop as well. Faraday also discovered that he could produce a current by moving a magnet through a loop of wire, or by moving the wire over a magnet. What Faraday had shown was that magnets could push back on moving electric charges, and that moving magnets could push on charges sitting still. This was like what Ørsted had found, but in reverse.
in 1873, James Clerk Maxwell summed up these connections in his theory of "classical electromagnetism," electricity and magnetism together. This theory was based on a set of four equations called Maxwell's equations, and the Lorentz force law. Maxwell's equations told us how to relate electricity and magnetism. They said that charges sitting still could push on other charges, but moving charges could produce magnetic fields that push on magnets. On the other hand, magnets sitting still can only push on moving charges, but moving magnets can push on any electric charges.
What's more, Maxwell's studies showed that light could be described as a ripple in the electromagnetic field. That is, light moves like a wave. However, Maxwell's work did not agree with classical mechanics, the description of forces and motion originally developed by Newton. Maxwell's equations predicted that light always moves through empty space at the same speed. This was a problem because in classical mechanics, velocities are "additive"-- if a person A on a train moving at speed X throws a ball with speed Y, then a person B on the ground sees the ball moving with speed X+Y. According to Maxwell, if person A turns on a flashlight, they will see the light moving away from them at speed "c". But person B on the ground must also see the light moving at speed "c", not "c"+X. This led to the development of the theory of special relativity by Einstein, which explained how the speed of light could be the same for everyone, and why classical mechanics does not work for things moving very fast.
Albert Einstein's work with the photoelectric effect and Max Planck's work with blackbody radiation did not work with the traditional view of light as a continuous wave. This problem would be solved after the development of quantum mechanics in 1925. This development led to the development of quantum electrodynamics which was developed by Richard Feynman and Julian Schwinger. Quantum electrodynamics was able to describe the interactions particles in detail.
Electromagnetic radiation is thought to be both a particle and a wave. This is because it sometimes acts like a particle and sometimes acts like a wave. To make things easier we can think of an electromagnetic wave as a stream of photons (symbol γ).
A photon is an elementary particle, meaning that it cannot be broken down into smaller particles. It is the particle that light is made up of. Photons also make up all other types of electromagnetic radiation such as gamma rays, X-rays, and UV rays. The idea of photons was thought up by Einstein. Using his theory for the photoelectric effect, Einstein said that light existed in small "packets" or parcels which he called photons.
Photons have energy and momentum. When two charged objects push or pull on each other, they send photons back and forth. So photons carry the electromagnetic force between charged objects. Photons are also known as messenger particles in physics because these particles often carry messages between objects. Photons send messages saying "come closer" or "go away" depending on the charges of the objects that are being looked at. If a force exists while time passes, then photons are being exchanged during that time.
Fundamental electromagnetic interactions occur between any two particles that have an electric charge. These interactions involve the exchange or production of photons. Thus, photons are the carrier particles of electromagnetic interactions.
Electromagnetic decay processes can often be recognized by the fact that they produce one or more photons (also known as gamma rays). They proceed less rapidly than strong decay processes with comparable mass differences, but more rapidly than comparable weak decays.
Acton, Massachusetts
Urbana, Illinois
Urbana is a city in the U.S. state of Illinois. It is the twin city of Champaign, Illinois and is separated by a single street. The main campus of the University of Illinois is in Urbana and Champaign. As of 2019, it has population of 42,214.
Population (2010) • City 41,250
Bill Oddie
William Edgar (Bill) Oddie OBE (born 7 July 1941) is a British comedian, actor, writer and television personality.
Oddie was born in Rochdale, Lancashire and grew up in Birmingham. He read English Literature at Pembroke College, Cambridge where he gained an MA. He is most famous for his birdwatching and conservation work. In the 1970s, he was a member of the BBC One television comedy series, The Goodies. Doctors found that his mother, Lilian, had schizophrenia. Oddie says that he does not remember her living at home because she spent a lot of her life in mental hospitals.
Oddie has bipolar disorder.
Montgomery Ward
Montgomery Ward was an American department store chain. It currently exists only as an online retail website since 2004. It only delivers in the United States.
It started as a mail-order catalog (called a "Wish Book") and department store in 1872. It owned Jefferson Ward discount stores. Jefferson Ward stores in the northern US were sold to Bradlees in 1985. The rest closed in 1988. All its stores closed in 2000. In 2004, it reopened as an online store.
Montgomery Ward was founded by Aaron Montgomery Ward, a Chicago entrepreneur.
Toes are the "digits" of the foot of an animal. Many animal species walk on their toes, and are called "digitigrade". Humans, and other animals that walk on the soles of their feet, are "plantigrade"; hoofed animals are "unguligrade".
In humans, the bones of each toe continue all the way to the heel, although in from the base of the toes they come together in the body of the foot. The inside toe is by far the thickest, and is called the "big toe", "great toe", or "hallux".
The one on the other end is short and thin. The toes, especially the big toe, play an essential role in walking, although a loss of the smallest toe will not affect the way people move.
AFC Champions League
The AFC Champions League is a football competition between the best club teams in Asia. The teams are selected because of good performances in matches. South Korea is the country that has the most titles for a team. Pohang Steelers got the most titles.
Raptor can mean:
Newton's laws of motion
Isaac Newton (1642–1727) is widely known as the father of dynamics, the study of motion. He developed three laws that are the foundation of classical mechanics. They are believed to be true because the results of experiments by scientists agree with his laws.
A "uniform velocity" means that an object moves at a constant speed without changing direction (i.e. in a straight line). A "net force" means that the forces acting on the object are not balanced. In other words, the first law states two things:
The first part states that a table resting on the ground will not move unless pushed. Although gravity is acting on the table, pulling it down, there is a "reaction force" from the ground which is pushing it back. The forces acting on the table are "balanced", so the object will not move.
The second part is harder to explain. A ball rolling along a flat surface will slow down and eventually come to a halt. This is because of friction, which is a force that slows the ball down. A ball rolling down a slope is also affected by friction, but the effect of the force of gravity is stronger than the friction, so there is a net force acting in the direction in which the ball is moving. In a place without the forces of friction, air resistance and gravity (e.g. in outer space) a moving object would keep on moving in a straight line if there were no force to slow it down or change its direction.
Newton's second law states that acceleration of a particle is dependent on the forces acting upon the particle and the particle's mass. For a given particle, if the net force is increased, the acceleration is increased. For a given net force, the more mass a particle has, the less acceleration it has.
For example, weight is a force that we feel on Earth, caused by the gravity. The weight on a particle is given by
where is the mass of the particle and is the local gravitational acceleration (not to be confused with "G", the universal gravitational constant), roughly equal to 9.8 meters per second (32 feet per second) on Earth.
We can express Newton's second law in terms of momentum. The momentum of a particle is defined as the product of its mass and velocity :
The acceleration of a particle is the time derivative of its velocity :
Therefore,
Thus, we have another way of stating Newton's second law:
In classical mechanics, the two forms of the second law, formula_1 and formula_6, are completely equivalent. Note that we assume that the mass of a particle does not change.
This is best understood with billiard balls, where you can easily see the action/reaction pairs of forces. Likewise, when you kick a football, not only does the ball move, but you feel a force on your foot.
The size of the forces on the first object equals the size of the force on the second object. The direction of the force on the first object is opposite to the direction of the force on the second object. Forces always come in pairs - equal and opposite action-reaction force pairs.
A variety of action-reaction force pairs are evident in nature. Consider the propulsion of a fish through the water. A fish uses its fins to push water backwards. But a push on the water will only serve to accelerate the water. Since forces result from mutual interactions, the water must also be pushing the fish forwards, propelling the fish through the water. The size of the force on the water equals the size of the force on the fish; the direction of the force on the water (backwards) is opposite the direction of the force on the fish (forwards). For every action, there is an equal (in size) and opposite (in direction) reaction force. Action-reaction force pairs make it possible for fish to swim.
Consider the motion of a car on the way to school. A car has wheels which spin forwards. As the wheels spin forwards, they grip the road and push the road backwards. Since forces result from mutual interactions, the road must also be pushing the wheels forward. The size of the force on the road equals the size of the force on the wheels (or car); the direction of the force on the road (backwards) is opposite the direction of the force on the wheels (forwards). For every action, there is an equal (in size) and opposite (in direction) reaction. Action-reaction force pairs make it possible for cars to move along a roadway surface.
"This is about the sport. You may be wanting to read about a fence."
Fencing is a sport that includes two people with swords. The aim is to score hits. There is also a referee.
In the olden times when two people argued they fenced the first one to draw blood was wrong and the person would be dead, so the person that won would claim the dead person's house and belongings.
The foil is a light and easy to bend weapon, first made in mid 17th century as a weapon for practice. 'Hits' can only be scored by hitting the target area with the point of the sword. The target area is the torso.
The épée is the heaviest of the three weapons. To score a hit, the push-button on the end of the weapon must remain fully down for 2-10 milliseconds, and must arrive (hit) with a force of at least 7.35 newtons. The target area for Épée is the entire body. This includes the feet and the head.
The sabre is the "cutting" weapon, with a curved guard (to protect the hand) and a triangular blade. However, in modern electric scoring, a touch with any part of the sabre, (point, flat or edge, as long as it is on target) will count as a hit. The target area in sabre is everything from the waist up, except for the hands.
Fencers wear a uniform to avoid injury. They wear a mask of black mesh with a bib. Also, a jacket, short pants and a sort of half-a-shirt (called an underarm protector or plastron), all of white fabric. They must also wear socks that cover their legs. Women must wear a chest protector. These are collectively called "whites."
Administrators are people who organize things like businesses. All businesses have administrators. They make decisions, organize the people who work there and make sure that things are working alright and there are no problems. Their work is called "administration". The administrators are part of the "management".
An administrator is also the person in charge of some of the small territories of the United Kingdom, for example Ascension Island and the British Antarctic Territory which are too small to run their own government.
Geneva Conventions
The Geneva Conventions are a set of four treaties of international law at wartime. They were formulated in Geneva, Switzerland. All of the four treaties are about humanitarian issues. The Swiss Henri Dunant was the person who started the creation of the Conventions. He did this after he saw the unimaginable cruelty of the Battle of Solferino in 1859.
Some parts of the four Geneva Conventions say that all countries who signed must create national laws to make violations of the Geneva Conventions a crime.
The conventions and their agreements are as follows:
In addition, there are three more protocols to the Geneva Conventions:
After the First Convention was agreed, the International Committee of the Red Cross was founded in 1863.