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The average speed of sound in air is approximately 340 m/s. Is this true? If yes,...

The average speed of sound in air is approximately 340 m/s. Is this true? If yes, what does a speed of 680 m/s in an air column represent or how should it be interpreted considering the average is 340 m/s?

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Answer #1

Yes, at sea level and 20 degree centigrade, the speed of sound is approx. 340m/s.

A speed of 680 m/s in an air column represent or interpreted as Mach number 2, i.e.,

Mach number is represented as the multiple of speed of sound. If the Mach number is 1.8 then it represents that the thing is travelling at 1.8 times the speed of sound(340m/s)

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