Multiple choice

A body moving in a medium with a speed greater than the speed of sound in the medium is said to be ________.

  1. infrasonic

  2. ultrasonic

  3. supersonic

  4. none of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Supersonic speed means exceeding the speed of sound in the medium. Infrasonic (A) refers to frequencies below 20 Hz, ultrasonic (B) to frequencies above 20 kHz. Option C correctly identifies supersonic as the term for velocities greater than sound speed.

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