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What is the ratio of inertial force to compressibility force and is also the key parameter, characterizing compressibility effects in fluids?

What is the ratio of inertial force to compressibility force and is also the key parameter, characterizing compressibility effects in fluids? Correct Answer Mach number

Mach number (M) is the ratio of inertial force to compressibility force and is used in problems where fluid compressibility is important. Strouhal number, on the other hand, is important in unsteady, oscillating flow problems. Froude number is the ratio of inertial force to gravitational force whereas, Weber number is the ratio of inertial force to surface tension.

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