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How fast is 526 kilometers per second?

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It's about 15,000 times as fast as a Cheetah.
In other words, 526 kilometers per second is 17,140 times the speed of a Cheetah, and the speed of a Cheetah is 0.000058340 times that amount.
(Acinonyx jubatus)
The cheetah can reach speeds of up to 0.03069 kilometers per second in short bursts. From a crouching position, the cheetah can attain these speeds in just 2.25 seconds.
It's about 20,000 times as fast as a Knuckleball (baseball).
In other words, 526 kilometers per second is 18,000 times the speed of a Knuckleball (baseball), and the speed of a Knuckleball (baseball) is 0.0000560 times that amount.
(a.k.a. knuckler, a.k.a. floater, a.k.a. dancer, a.k.a. butterfly ball) (major league average)
The average speed of major league knuckleball pitch is 0.031 kilometers per second. Eddie Cicotte, who was later implicated in the 1919 Black Sox scandal, is credited with developing the pitch ca. 1906.
It's about 25,000 times as fast as a Greyhound.
In other words, 526 kilometers per second is 26,200 times the speed of a Greyhound, and the speed of a Greyhound is 0.00003820 times that amount.
(a.k.a. English greyhound) (approximate maximum speed)
Greyhounds reach average race speeds of 0.0201 kilometers 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 30,000 times as fast as a Gazelle.
In other words, the speed of a Gazelle is 0.0000300 times 526 kilometers per second.
(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 0.02 kilometers 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 30,000 times as fast as a Hare.
In other words, the speed of a Hare is 0.0000300 times 526 kilometers per second.
(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 0.02 kilometers 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 30,000 times as fast as Secretariat.
In other words, 526 kilometers per second is 31,300 times the speed of Secretariat, and the speed of Secretariat is 0.00003190 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 0.0168 kilometers per second in 1973. His margin of victory in the race, also a record-setter, was 31 lengths.
It's about 50,000 times as fast as Michael Johnson.
In other words, 526 kilometers per second is 50,820 times the speed of Michael Johnson, and the speed of Michael Johnson is 0.000019680 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 0.01035 kilometers 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.