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955 mach is about 15,000 times as as a Greyhound.
In other words, it's 15,800 times the of a Greyhound, and the of a Greyhound is 0.0000633 times that amount.
(a.k.a. English greyhound) (approximate maximum speed)
Greyhounds reach average race speeds of 0.0607 mach. Despite their racing prowess, greyhounds are not considered energetic dogs — the typical greyhound race requires the dogs to run for less than 35 seconds.
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