How fast do you have to be moving to break the sound barrier?

Answer:
Mach 1 is the speed at which you break the sound barrier. The speed of sound, or Mach 1, at sea level and under "standard condition" is:

1,116.4 ft/s
340.3 m/s
761.2 mph
1,225.1 km/h

First answer by Woodwose. Last edit by Woodwose. Contributor trust: 223 [recommend contributor]. Question popularity: 10 [recommend question]

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