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How fast is 581 inches per second?

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 It's about nine-tenths as fast as Secretariat In other words, 581 inches per second is 0.878 times the speed of Secretariat, and the speed of Secretariat is 1.14 times that amount. (at Belmont Stakes, 1973)Setting a record finish, Secretariat ran the Belmont Stakes — a 12 furlong race length — in 2:24, for an average speed of 661 inches per second in 1973. His margin of victory in the race, also a record-setter, was 31 lengths. It's about three-fourths as fast as a Greyhound In other words, 581 inches per second is 0.734 times the speed of a Greyhound, and the speed of a Greyhound is 1.36 times that amount. (a.k.a. English greyhound) (approximate maximum speed)Greyhounds reach average race speeds of 792 inches per second. Despite their racing prowess, greyhounds are not considered energetic dogs — the typical greyhound race requires the dogs to run for less than 35 seconds. It's about one-and-two-fifths times as fast as Michael Johnson In other words, 581 inches per second is 1.426 times the speed of Michael Johnson, and the speed of Michael Johnson is 0.7013 times that amount. (a.k.a. Michael Duane Johnson) (sprinter; 1967-) (at the Atlanta Olympics, 1996)Setting a record that stood for 12 years, Michael Johnson ran a 200 m in 0:19.32 for an average speed of 407.60 inches per second at the 1996 Olympics. Johnson was nicknamed "the Man with the Golden shoes" in recognition of the custom footwear worn during these races — a pair of Nikes with a left size of 10.5 and a right size of 11. It's about seven-tenths as fast as a Gazelle In other words, 581 inches per second is 0.7 times the speed of a Gazelle, and the speed of a Gazelle is 1 times that amount. (for Thomson's Gazelle, a.k.a. Eudorcas thomsoni, a.k.a. "Tommie", a.k.a. "Tommy")A Thomson's gazelle can reach speeds of up to 900 inches per second. The gazelle's speed doesn't match that of its chief predator, the cheetah, but a gazelle's endurance usually ensures an escape in distances greater than 500 m (0.3 mi). It's about seven-tenths as fast as a Hare In other words, 581 inches per second is 0.7 times the speed of a Hare, and the speed of a Hare is 1 times that amount. (for European Brown Hare, a.k.a. Brown Hare, a.k.a. Lepus europaeus, a.k.a. Brown Hare)The European Hare can run at speeds of up to 800 inches per second. While speed is a factor in their escapes, hares evade their chief predators — wolves, foxes, and golden eagles — by fleeing in a zigzag pattern. It's about one-and-two-fifths times as fast as Usain Bolt In other words, 581 inches per second is 1.43 times the speed of Usain Bolt, and the speed of Usain Bolt is 0.699 times that amount. (at the Beijing Olympics, 2008) (a.k.a. Usain St. Leo Bolt, OJ, C.D.) (sprinter; 1986-)Setting a world record, Usain Bolt ran a 100 m in 0:09.69 for an average speed of 407 inches per second at the 2008 Olympics. Furthermore, Bolt's margin of record breaking — 0.03 s — is the largest margin of victory in the history of digital measurements. It's about one-and-three-fifths times as fast as Flo-Jo In other words, 581 inches per second is 1.575 times the speed of Flo-Jo, and the speed of Flo-Jo is 0.6349 times that amount. (at the Seoul Olympics, 1998) (a.k.a. Florence Griffith-Joyner, a.k.a. Florence Delorez Griffith) (swimmer; 1959-1998)Setting a world record in 1988, Flo-Jo ran a 200 m in 0:21.34 for an average speed of 369 inches per second. Known as a 200 m runner, Joyner also set a record time in a 100 m race at in 1987.