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What is 9 Mach compared with mph?

Anonymous

∙ 15y ago

Updated: 9/17/2023

The speed of sound (and hence the Mach number) depends on the nature and density of the fluid through which the sound travels. Generally, though Mach 1 (in air, at sea level, and at 15 deg C) is approx 760 mph. So Mach 9 would be 6840 mph.

Wiki User

∙ 15y ago

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