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Q: When the speed of an object exceeds to the speed of sound, it is said to travel at –––––– speed.
  • A. Subsonic
  • B. Ultrasonic
  • C. Super sonic
  • D. sonic
Correct Answer: Option C - When a body moves at a speed greater than the speed of sound (1 Mach), it is called the supersonic speed.
C. When a body moves at a speed greater than the speed of sound (1 Mach), it is called the supersonic speed.

Explanations:

When a body moves at a speed greater than the speed of sound (1 Mach), it is called the supersonic speed.