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Q: An object travelling at a speed greater than the speed of sound in air is called ……….
  • A. supersonic
  • B. sonic
  • C. hypersonic
  • D. ultrasonic
Correct Answer: Option A - An object travelling at a speed greater than the speed of sound in air is called supersonic speed.
A. An object travelling at a speed greater than the speed of sound in air is called supersonic speed.

Explanations:

An object travelling at a speed greater than the speed of sound in air is called supersonic speed.