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Symbol: M，Ma / Base data: velocity. Used to express the speed of a high-speed projectile, and speed of sound is “1”
About 340 m/s if the conditions are 1 atm and 15℃
Mach expresses the speed of a rocket and the like. When Mach is “1”, it is the same as the speed of sound. Its cool-sounding name derives from the name of Ernst Mach, the first physicist to use this unit. The speed of sound differs depending on conditions, but it is 340 m/s if the conditions are 1 atm and 15℃.
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