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Correction for the speed of Secretariat

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How fast is 0.00000010240 times the speed of light?
It's about one-and-four-fifths times as fast as Secretariat
The speed of Secretariat is about 0.0000000560 times the speed of light.
(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 0.0000000560 times the speed of light in 1973. His margin of victory in the race, also a record-setter, was 31 lengths.
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