One Mach number is equal to

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(B) The Mach number is a dimensionless quantity representing the ratio of the speed of an object to the speed of sound in the surrounding medium.Mathe

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Velocity of sound $(332\,m/s)$

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(B) The Mach number is a dimensionless quantity representing the ratio of the speed of an object to the speed of sound in the surrounding medium.Mathematically,$	ext{Mach number} = \frac{	ext{Velocity of object}}{	ext{Velocity of sound}}$.Therefore,one Mach number corresponds to the velocity of sound in that medium,which is approximately $332\,m/s$ in air at standard conditions.

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