When a rocket is traveling toward a mountain at 100 m/s,the sound waves from this rocket's engine approach the mountain at speed V.If the rocket doubles its speed to 200 m/s,the sound waves from the engine will now approach the mountain at speed
A)4V.
B)2V.
C) V.
D)V.

Question

When a rocket is traveling toward a mountain at 100 m/s,the sound waves from this rocket's engine approach the mountain at speed V.If the rocket doubles its speed to 200 m/s,the sound waves from the engine will now approach the mountain at speed
A)4V. 
B)2V. 
C) V. 
D)V.

Quizplus · Accepted Answer

The speed of sound waves is independent of the speed of the source, so the speed of the sound waves from the rocket's engine remains the same regardless of the rocket's speed. Therefore, the sound waves will still approach the mountain at speed V.

When a Rocket Is Traveling Toward a Mountain at 100