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Respectively, these square divisions of land are approximately 80 chains (one mile or 1.6 km), 40 chains (half a mile or 800 m), and 20 chains (a quarter mile or 400 m) on a side. The chain is still used in agriculture: measuring wheels with a circumference of 0.1 chain (diameter ≈ 2.1 ft or 64 cm) are still readily available in Canada and ...
Women's hurdles are slightly lower at 84 cm (2 ft 9 in) for the 100 m event and 76 cm (2 ft 6 in) for the 400 m event. [62] [63] The most common events are the 100 metres hurdles for women, 110 m hurdles for men and 400 m hurdles for both sexes. The men's 110 m has been featured at every modern Summer Olympics while the men's 400 m was ...
(99/100 cm) 6.69 Wayne Davis: March 11, 2007 Landover, United States 15 years, 201 days 55 m hurdles (99/100 cm) 7.63 Ja Shawn Combs: March 12, 2011 Hillside, United States 60 m hurdles (99/100 cm) 7.62 Wayne Davis: March 16, 2008 Landover, United States 16 years, 207 days Pole vault: 4.70 m Eric Gordon: March 12, 2012 Normal, United States ...
≡ 1 atm × 1 cm 3 /min = 1.688 75 × 10 −3 W: atmosphere-cubic centimetre per second: atm ccs [citation needed] ≡ 1 atm × 1 cm 3 /s = 0.101 325 W: atmosphere-cubic foot per hour: atm cfh [citation needed] ≡ 1 atm × 1 cu ft/h = 0.797 001 247 04 W: atmosphere-cubic foot per minute: atm cfm [citation needed] ≡ 1 atm × 1 cu ft/min = 47 ...
55 m hurdles (107/100 cm) 7.30 Josh Hembrough: Northern High School: Forest Hills, Michigan: Allendale, Michigan: January 12, 2007 60 m hurdles (99/100 cm) 7.40 Trey Cunningham: Winfield High School Winfield, Alabama: Fort Washington Avenue Armory: New Balance Nationals: March 12, 2017 [120] 60 m hurdles (107/100 cm) 7.85 Josh Hembrough ...
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The proper length of the first lane of a competitive running track is 400 m (1,312.3 ft). Some tracks are not built to this specification, instead being a legacy to imperial distances such as 440 yd (402.336 m), equivalent to a quarter of a mile.
The 100 metres hurdles, or 100-meter hurdles, is a track and field event run mainly by women (the male counterpart is the 110 metres hurdles). For the race, ten hurdles of a height of 33 inches (83.8 cm) are placed along a straight course of 100 metres (109.36 yd). The first hurdle is placed after a run-up of 13 metres from the starting line.