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List Of World Championships In Athletics Records
The World Championships in Athletics is a biennial event which began in 1983. Organised by the International Association of Athletics Federations (IAAF), the World Championships are a competition comprising track and field athletics events available to male and female athletes from any of the IAAF's 213 member federations. Championship records are set when an athlete achieves the best mark in an event at one of the editions of the Championships. World, area, and national records have been set at the championships over the course of its history. Competitors at the World Championships come from around the globe and records have been broken by athletes from all six continents. The United States has been the most successful competitor at the World Championships in both medals and records. Four athletes hold multiple records: * Usain Bolt holds records in the 100 and 200 metres as well as the 4 x 100 relay * Michael Johnson holds individual and relay records in the 400 metres * Jacki ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
200metres Helsinki2005
The metre (British spelling) or meter (American spelling; see spelling differences) (from the French unit , from the Greek noun , "measure"), symbol m, is the primary unit of length in the International System of Units (SI), though its prefixed forms are also used relatively frequently. The metre was originally defined in 1793 as one ten-millionth of the distance from the equator to the North Pole along a great circle, so the Earth's circumference is approximately km. In 1799, the metre was redefined in terms of a prototype metre bar (the actual bar used was changed in 1889). In 1960, the metre was redefined in terms of a certain number of wavelengths of a certain emission line of krypton-86. The current definition was adopted in 1983 and modified slightly in 2002 to clarify that the metre is a measure of proper length. From 1983 until 2019, the metre was formally defined as the length of the path travelled by light in a vacuum in of a second. After the 2019 redefiniti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
