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vehicle-kilometre (vkm [1]) as a measure of traffic flow, determined by multiplying the number of vehicles on a given road or traffic network by the average length of their trips measured in kilometres. [2] vehicle-mile (vehicle miles traveled, or VMT [1]) same as before but measures the trip expressed in miles.
The record is 44.72 km/h (27.78 mph), measured between meter 60 and meter 80 of the 100 meters sprint at the 2009 World Championships in Athletics by Usain Bolt. [4] [5] (Bolt's average speed over the course of this race was 37.578 km/h or 23.35 mph.) [6] Compared to quadrupedal animals, humans are exceptionally capable of endurance, but incapable of great speed. [7]
17.87 m (+1.3 m/s) Jaydon Hibbert: University of Arkansas: May 13, 2023 SEC Championships Baton Rouge, Louisiana [19] 17.54 m Mike Conley Sr. University of Arkansas: June 1, 1985 Austin, Texas: Austin, Texas [5] Shot put: 22.00 m John Godina: University of California, Los Angeles: June 3, 1995 NCAA Division I Championships: Knoxville, Tennessee ...
In both customary and imperial units, one foot comprises 12 inches, and one yard comprises three feet. Since an international agreement in 1959, the foot is defined as equal to exactly 0.3048 meters. Historically, the "foot" was a part of many local systems of units, including the Greek, Roman, Chinese, French, and English systems. It varied in ...
For example, in 1980, high schools converted their running distances from Imperial (yards) to metric, but instead of running conventional international distances like 1500 metres in place of the mile run, a more equitable but non-standard 1600 meters was chosen.
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 metre, symbol m, is the SI unit of length. It is defined by taking the fixed numerical value of the speed of light in vacuum c to be 299 792 458 when expressed in the unit m⋅s −1, where the second is defined in terms of the caesium frequency Δν Cs. The concept of defining a unit of length in terms of a time received some comment. [134]
A number of units were used to measure area. One square fathom was equal to 3.546 m 2 and one square mile was equal to 56.7383 km 2, as they were defined by their metric equivalents. [1] Some other units are given below: [1] 1 square inches = 1 ⁄ 5,184 square fathom; 1 square feet = 1 ⁄ 36 square fathom; 1 square alin = 1 ⁄ 9 square fathom