Question

One Mach number is equal to

• A. Velocity of light
• B. Velocity of sound $(332m/\sec)$
• C. $1km/\sec$
• D. $1m/\sec$

Answer 1

Answer: (B)

Velocity of sound $(332m/\sec)$

Answer 2

Mach number $= \frac{\text{Velocity of object}}{\text{Velocity of sound}}$.