Le Châtelier's principle is a principle used in Chemistry and Physics to describe how a system at equilibrium reacts to external changes.
It is used to show how the point of equilibrium of a system will move to oppose a change in the conditions of the system, following Newton's third law. This is most commonly seen in reversible reactions in chemistry, where a chemical reaction has reached a point where the formation of products happens at the same rate the products decay back into reactants. This principle can then be used to increase the amount of desired products made by moving equilibrium towards that side in chemical industries.
If the concentration of reactants in a reaction increases, the point of equilibrium moves towards the products as this gets rid of the excess reactants and cancels the change. Similarly, if the concentration of products increases, the equilibrium moves towards the reactants.
If the pressure of a system increases, the point of equilibrium will shift to the side with less moles, as that side will occupy less volume and therefore will reduce the pressure.
If the temperature of a system is increased, the point of equilibrium moves towards whichever side is more endothermic as this will take in the excess energy as part of the products and so cancels the change of increased temperature.
This principle is also shown by Lenz's law, which states that a changing magnetic flux will produce an opposing magnetic flux (and therefore a magnetic and electric field) in any nearby metals. This will then produce a second current in the nearby metal in the opposite direction to the original current.
Continental United States
The continental United States is the area of the United States of America that is located in the continent of North America. It includes 49 of the 50 states (48 of which are located south of Canada and north of Mexico, known as the "lower 48 states", the other being Alaska) and the District of Columbia, which contains the federal capital, Washington, D.C. The only state which is not part of this is Hawaii (as they are islands in the Pacific Ocean and not part of North America).
"On May 14, 1959, the U.S. Board on Geographic Names issued the following definitions based partially on the reference in the Alaska Omnibus Bill, which defined the Continental United States as "the 49 States on the North American Continent and the District of Columbia..." The Board reaffirmed these definitions on May 13, 1999."
Some sources incorrectly mix up the "continental United States" with the "contiguous United States" (which consists simply of the lower 48 states and the District of Columbia). The contiguous United States (also known as the United States Mainland) does not include Alaska, Hawaii, or any other territories under the control of the United States.
Alaska is unique among the US states as it is part of the North American continent, meaning it is attached via Canada, and so is part of the "Continental United States". However, Alaska is not part of the "Contiguous United States", because it is not attached directly to the lower 48 states.
Bible Belt
The Bible Belt is term for a part of the United States in which many people believe in conservative Evangelical Protestantism. This makes it a dominant part of the culture.
British people
Britons, British people, or the British are people from Britain – either from the United Kingdom or the island of Great Britain. In history, the people of the British Empire, and later the British Commonwealth, were also named British or Britons.
The first people to be named Britons were the people of ancient Britain, the ancient Britons. The ancient Romans named the people of Britain in . People from Roman Britain called themselves in . Bede used the spelling in , the spelling of which was possibly learned from the Old English word of the same meaning.
Originally, the word Briton in the English language meant a person from one of the Brythonic languages-speaking peoples in Great Britain and northern France: mostly the people of Strathclyde, Wales, Cornwall, and Brittany. This meaning of the word was used in Middle English from the 13th century and after. In the 16th and 17th centuries, Briton could also be a name for Welsh people.
The use of Britons to mean all the people of Britain was not common in the English language before the early 18th century. It became more usual after the Acts of Union 1707 joined together the Kingdom of England and the Kingdom of Scotland into the United Kingdom of Great Britain. The word Briton was frequently used in the 18th and 19th centuries with the suggestion of "qualities of bravery and fortitude". The rare word "Britoness" was sometimes used in the past for women from Britain. Writers like Edmund Spenser, Thomas Babington Macaulay, and Alfred, Lord Tennyson used it for strong women like the ancient British queen Boudica (who fought the Romans) and the English queen, Elizabeth I (whose Royal Navy defeated the Spanish Armada).
Scissor-tailed flycatcher
The scissor-tailed flycatcher ("Tyrannus forficatus"), also known as the Texas bird-of-paradise and swallow-tailed flycatcher, is a type of bird that lives in North America, in the United States and Mexico. It eats insects. It is grey on top and light grey underneath with pink on the sides. The wings are dark and it has a long black tail. It is named "scissor-tailed" because its tail looks like a pair of scissors. The tail is shorter when it is young, and the bird is not as colorful.
The scissor-tailed flycatcher is closely related to the kingbirds. It is also the state bird of Oklahoma. The common name is derived from its former Latin name-Muscivoria forficata, meaning "flying"-"scissors" and "to devour." In Oklahoma, scissortails can be found on open prairies, along tree-lined roads, and along roadsides perched on fences, limbs and in isolated trees. They consume a great number of grasshoppers, crickets, spiders, and other ground-dwelling insects making them economically important and popular with farmers and ranchers.
Soon after the birds arrive in the state, the males begin their famous "sky dance," a popular site along roadsides during spring and early summer. After climbing about 100 feet in the air, the male makes a series of V-shaped flights, then plunges down in an erratic zigzag course often somersaulting while uttering a rolling, cackling call. The performance has been described as "an aerial ballet of incomparable grace." Nesting usually takes place in an isolated tree 7–30 feet above ground. Often two broods of 4-6 each are raised during the summer.
Scissor-tailed flycatchers are easily identified by their long scissor-like tail, which may reach nine inches in length. During flight the bird opens its tail like a pair of scissors and folds or closes the "scissors" when perching. The nape of its neck and its back are pearl gray, and the breast is white. Wings are sooty black with a touch of scarlet at the shoulders. The principal threat to scissortails is poaching. A great number of birds have been killed by poachers who wanted only the bird's tail.
Eastern redbud
Cercis canadensis L. (also known as the eastern redbud) is a large shrub or small tree native to eastern North America from southern Ontario, Canada south to northern Florida, United States. The tree is also the state tree of Oklahoma.
Black Mesa
Black Mesa is a mountain in Oklahoma. It is the highest point in the state.
Exit
EXIT or exit (lat. "exit" "he/she leaves", pl. "exeunt") may mean:
Cassowary
Cassowaries ("Casuarius") are a kind of large bird which cannot fly. They are part of a group of flightless birds called the ratites. The ostrich, emu, moa (now extinct) and small kiwi are other ratites.
The cassowary lives in the tropical rainforests of New Guinea and north eastern Australia. They are shy birds living deep in the forest. They can also become angry, and they will attack people. This makes it hard to learn about them.