Multiple choice

The ratio of velocity of a body to the velocity of sound is _____.

  1. magic number

  2. laplace number

  3. natural number

  4. mach number

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Mach number is the dimensionless ratio of an object's velocity to the speed of sound in the surrounding medium. It's crucial in aerodynamics for analyzing compressible flow. Option D correctly identifies this standard physics definition.

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