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How fast is 745 knots?

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It's about twenty times as fast as a Hare.
In other words, the speed of a Hare is 0.05 times 745 knots.
(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 40 knots. 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-twentieth as fast as The Space Shuttle.
In other words, 745 knots is 0.049494 times the speed of The Space Shuttle, and the speed of The Space Shuttle is 20.2040 times that amount.
(Orbiter vehicle velocity)
The space shuttle orbits at a speed of 15,052 knots. During liftoff, the space shuttle accelerates to orbital speed in 8.5 minutes, consuming over 1.59 million kg (3.51 million lbs) of propellant in the process.
It's about twenty times as fast as Secretariat.
In other words, 745 knots is 22.80 times the speed of Secretariat, and the speed of Secretariat is 0.0439 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 32.60 knots in 1973. His margin of victory in the race, also a record-setter, was 31 lengths.
It's about forty times as fast as Michael Johnson.
In other words, 745 knots is 37.03 times the speed of Michael Johnson, and the speed of Michael Johnson is 0.02701 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 20.120 knots 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 forty times as fast as Usain Bolt.
In other words, 745 knots is 37.20 times the speed of Usain Bolt, and the speed of Usain Bolt is 0.0269 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 20.10 knots 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 40 times as fast as Flo-Jo.
In other words, 745 knots is 40.890 times the speed of Flo-Jo, and the speed of Flo-Jo is 0.02446 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 18.220 knots. Known as a 200 m runner, Joyner also set a record time in a 100 m race at in 1987.
It's about 50 times as fast as Noah Ngeny.
In other words, 745 knots is 50.580 times the speed of Noah Ngeny, and the speed of Noah Ngeny is 0.01977 times that amount.
(in Rieti, Italy; 1999) (sprinter; 1978-)
Setting a world record at the Rieti Grand Prix in 1999, Noah Ngeny ran 1,000 m in 2:11.96 for an average speed of 14.730 knots. According to some reports, Ngeny did not begin running competitively until just three years before setting the record.