Multiple choice general knowledge science & technology

Mach number is used in connection with the speed of

  1. sound

  2. aircraft

  3. spacecraft

  4. ships
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The Mach number represents the ratio of an object's speed to the speed of sound in the surrounding medium. It is primarily used to characterize aircraft velocities, classifying flight regimes from subsonic (M<1) to supersonic (M>1).

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