Science

How fast is mach four?


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The speed of Mach 4 (where Mach 1 is speed of sound) equals to 4939 km per hour (3069 mi per hour).

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The speed of sound is 741 miles per hour. Mach 4 is 2964 miles per hour.

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Mach four is four times the speed of sound. It is equivalent to 3069 miles per hour or 4939 kilometers per hour.

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