It was one of the 100 largest cities for many US Census counts, from 1890–1960, including 1920, when it had over 100,000 residents for the first time. In 1997, voters approved a proposition to unify the city and county governments.
On March 30, 2011, Internet search company Google Inc. announced that Kansas City had been selected as the site of an experimental fiber-optic network that Google will build at no cost to the city. Kansas City was chosen from a field of 1,100 US communities that had applied for the network. Google plans to have the network in operation by 2012.
According to the United States Census Bureau, the city has a total area of 127.8 sq mi (331.0 km²). 124.3 sq mi (321.8 km²) of it is land and 3.5 sq mi (9.2 km²) of it is water.
Kansas City is organized into a system of neighborhoods, some with histories as independent cities or the sites of major events.
Neighborhoods of Kansas City, Kansas
Kansas City is near "Tornado Alley", a region where cold air from the Rocky Mountains and Canada meets warm air from the Gulf of Mexico. This situation causes the formation of powerful storms. The most recent tornado to strike Kansas City itself was in May 2003. The region is also prone to ice storms, such as the 2002 ice storm during which hundreds of thousands lost power for days and (in some cases) weeks. The MoKan area was subject to flooding, including the Great Flood of 1993 and the Great Flood of 1951.
As with Kansas City, Missouri, the percentage of the city's biggest ethnic group, non-Hispanic whites, has gone down from 76.3% in 1970 to 40.2% in 2010.
Kansas City has four sister cities, as designated by Sister Cities International:
Dinitrogen tetroxide
Dinitrogen tetroxide, also known as nitrogen tetroxide or dinitrogen tetraoxide, is a chemical compound. Its chemical formula is NO. It contains nitrogen in its +4 oxidation state. It contains nitrogen and oxide ions.
It is a colorless gas, although it is sometimes polluted with nitrogen dioxide. It is very corrosive and a strong oxidizing agent. It can ignite on contact with hydrazine. It can be made by bonding two nitrogen dioxide molecules together at a low temperature or a high pressure.
It is made by bonding nitrogen dioxide molecules together in pairs.
It is used as a rocket propellant, along with hydrazine. This mixture is good since it does not have to be ignited. It is used similar to nitrogen dioxide to make nitric acid. It can react with metals to make nitrates.
Dinitrogen is highly toxic and corrosive. Some astronauts breathed it and had to go to a hospital.
Nitrogen oxide
Nitrogen oxide may refer to any of these chemical compounds:
Nitrogen acid
Nitrogen acids are acids containing nitrogen.
Dinitrogen pentoxide
Dinitrogen pentoxide is a chemical compound. It is made by removing water from nitric acid. Its chemical formula is NO. It is a powerful oxidizing agent. It is a white solid. It is made by reacting phosphorus(V) oxide with nitric acid. The phosphorus(V) oxide removes the water from the nitric acid. It can be dissolved in chloroform to add the NO group to some chemical compounds. It is toxic as it can make nitrogen dioxide gas.
Nitrogen trichloride
Nitrogen trichloride is a chemical compound. It contains nitrogen in its -3 oxidation state. It contains nitrogen and chloride ions. Its chemical formula is NCl. It is an explosive. It is made by reacting ammonium compounds with chlorine. It reacts with hot water to release hypochlorous acid and ammonia.
Hypochlorous acid
Hypochlorous acid is a chemical compound. Its chemical formula is HClO or HOCl. It is not stable. It contains chlorine in its +1 oxidation state. It is a powerful oxidizing agent. It is made by reacting sodium hypochlorite with an acid that cannot be oxidized, such as phosphoric acid. If the acid can be oxidized, the hypochlorous acid will be destroyed. It is used to make some chemicals. It breaks down into hydrochloric acid and oxygen in sunlight. It reacts with hydrochloric acid to make chlorine gas. It is a powerful disinfectant.
Sodium amide
Sodium amide, also known as sodamide, is a chemical compound. It contains sodium and amide ions. Its chemical formula is NaNH. It is a very strong base, even stronger than hydroxides like sodium hydroxide. It reacts violently with water. It is a white solid, although it can be gray. It is made by reacting sodium metal with liquid or gaseous ammonia. It is used to make hydrazine and sodium azide. It is used to make various chemicals. It reacts with water to make ammonia and sodium hydroxide. It burns in air to make oxides of sodium and nitrogen, such as nitrogen dioxide. If there is only a little air, explosive chemicals may form. If it turns yellow or brown, get rid of it immediately. It is corrosive because it is a strong base.
Amide
Amide can refer to two different things.
An amide ion is different from an amide in organic chemistry. The amide ion is made by deprotonating ammonia. This is ammonia acting as an acid, although a very weak one. Amides made by deprotonating ammonia are very strong bases. Sodium amide is an example.
Amides are also chemical compounds. They are made by reacting carboxylic acids like acetic acid with amines. There are many ways to make them. They are also used in many chemical reactions.
Sodium nitrate
Sodium nitrate, also known as caliche, Chile saltpeter, and soda niter, is a chemical compound. It contains sodium and nitrate ions. Its chemical formula is NaNO.
It can dissolve in water very easily. It is an oxidizing agent. It is a white crystalline solid.
It is found in very dry areas. If it was wet, then the sodium nitrate would dissolve. But it is normally made artificially by reacting sodium hydroxide and nitric acid. Chile used to have much sodium nitrate naturally in the very dry Atacama Desert. It is found in small amounts in leafy green vegetables.
It is used to supply nitrogen to the soil. It is also used in making gunpowder. Some other explosives use it. It can be used to make nitric acid by reaction with sulfuric acid. It is used in rockets and smoke bombs. Sometimes it can be a food preservative.
Lead azide
Lead azide, also known as lead(II) azide, is a chemical compound. Its chemical formula is Pb(N). It contains lead and azide ions. It contains lead in its +2 oxidation state.
Lead azide is an explosive. Most other azides just burn rapidly. It is used as a detonator to detonate other explosives. It is made by reacting lead(II) nitrate and sodium azide. It can be destroyed by sodium dichromate. It can react with other metals such as copper to make even more sensitive azide explosives. It does not become less of an explosive when wet. It will explode if it is dropped .
History of Iran
Iran is home to one of the world's oldest continuous major civilizations, with historical and urban settlements dating back to 4000 BC. The Medes unified Iran as a nation and empire in 625 BC.
The Islamic conquest of Persia (633–656) and the end of the Sassanid Empire was a turning point in Iranian history. Iran had been a monarchy ruled by a shah, or emperor, almost without interruption from 1501 until the 1979 Islamic revolution, when Iran officially became an Islamic Republic on 1 April 1979.
Before Iran was called Iran, and before Iranians lived there, a different group of people lived in Iran. These people were called the Elamites. The Elamites are mentioned in the Bible. The Elamites lived in a kingdom called Elam. Elam was conquered by Iranian peoples, such as the Medes (a type of Iranian), because the Elamites became weak after fighting the Assyrian people (a different people) for too long. The Iranians would then go on to conquer the Assyrians, as well.
The name Iran comes from "Aryan" and is also mentioned in the ancient book of the Zoroastrians, which was called the Avesta. "Iran" means "Aryan" in Persian. In the 19th and early 20th century, the name "Aryan" was used by Europeans to mean "all Indo-Europeans".