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The 440-yard dash, or quarter-mile race, is a sprint race in track and field competitions. In many countries, athletes compete in the 440 yard dash (402.336 m) – which corresponds to a quarter mile. Many athletic tracks are 440 yards per lap. In the 19th century it was thought of as a middle distance race. [1]
The 4 × mile relay is an athletics track event in which teams comprise four runners who each complete one mile (1,609.344 metres) or slightly more than 4 laps on a standard 400 metre track. The event is not often run as most legacy 440 yard tracks have been converted to 400 metres, thus making 4 × 1500 or 4 × 1600 metres easier to manage.
Quarter-mile or 1 ⁄ 4 mile may refer to: A dragstrip competition or vehicle test in motorsport, where cars or motorcycles compete for the shortest time from a standing start to the end of a straight 1 ⁄ 4 mile (0.40 km) track; The 440-yard dash, a sprint footrace in track and field competition on a 440 yards (1,320 ft; 400 m; 0.25 mi) oval
After setting the national high school record in the mile, Jim Ryun set the world record in 1966 and then again in 1967, when he ran 3:51.1. Ryun was 19 at the time, making him the youngest world record holder in the mile to date. His record stood for nine years. [4] Ryun competed in the 1964, 1968 and 1972 Olympic games.
Torque-free precessions are non-trivial solution for the situation where the torque on the right hand side is zero. When I is not constant in the external reference frame (i.e. the body is moving and its inertia tensor is not constantly diagonal) then I cannot be pulled through the derivative operator acting on L.
For example, the range 1 to 10 is a single decade, and the range from 10 to 100 is another decade. Thus, single-decade scales (named C and D) range from 1 to 10 across the entire length of the slide rule, while double-decade scales (named A and B) range from 1 to 100 over the length of the slide rule.
For bicycles with 700c wheels, some cyclists quote gear inches based on a nominal wheel diameter of 27 inches, corresponding to the old British tire size of 27 x 1 + 1 ⁄ 4" (ETRTO 630). Strictly speaking, the rolling diameter of a 700c wheel may be significantly higher or lower than 27", depending on the tire size, e.g. nearly 27.5" for a ...
≡ 1 ⁄ 4 long cwt = 2 st = 28 lb av = 12.700 586 36 kg: quarter (informal) ≡ 1 ⁄ 4 short ton = 226.796 185 kg: quarter, long (informal) ≡ 1 ⁄ 4 long ton = 254.011 7272 kg: quintal (metric) q ≡ 100 kg = 100 kg scruple : s ap ≡ 20 gr = 1.295 9782 g: sheet: ≡ 1 ⁄ 700 lb av = 647.9891 mg slug; geepound: slug ≡ g 0 × 1 lb av × ...