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50 metres, or 50-meter dash, is a sprint event in track and field. It is a relatively uncommon non-championship event for indoor track and field, normally dominated by the best outdoor 100 metres runners. At outdoor athletics competitions it is used in the Special Olympics and a rare distance, at least for senior athletes.
49 meters – wavelength of the broadcast radio shortwave band at 6.1 MHz; 50 meters – length of a road train; 50 meters – height of the Arc de Triomphe; 55 meters – height of the Leaning Tower of Pisa; 62 meters – wingspan of Concorde; 62.5 meters – height of Pyramid of Djoser; 64 meters – wingspan of a Boeing 747-400
The metre (or meter in US spelling; symbol: m) is the base unit of length in the International System of Units (SI). Since 2019, the metre has been defined as the length of the path travelled by light in vacuum during a time interval of 1 / 299 792 458 of a second, where the second is defined by a hyperfine transition frequency of caesium.
The length of 50 metres (164 ft) must be between the touch pads at the end of each lane, if they are used. [3] If starting blocks are used, then there must be a minimum depth of 1.35 metres (4.4 ft) from between 1 metre (3 ft 3 in) from the end of the pool to at least 6 metres (19 ft 8 in) from the end of the pool.
The non-dominant leg should come out with a long ... 50 meters 5.56 Donovan Bailey [62] CAN [63] Reno, NV (USA) 09 FEB 1996 60 meters 6.34 Christian Coleman [64]
This list of motor yachts by length, is a table of the world's longest active superyachts, with an overall length of at least 75 metres (246 ft) and up.. These boats are also known as "megayachts", "gigayachts" and even "terayachts", usually depending on length.
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Under the Tang dynasty (AD 618–907), the li was approximately 323 meters. [citation needed] In the late Manchu or Qing dynasty, the number of chi was increased from 1,500 per li to 1,800. This had a value of 2115 feet or 644.6 meters. In addition, the Qing added a longer unit called the tu, which was equal to 150 li (96.7 km).