Multiple Choice
A jet plane in straight horizontal flight passes over your head.When it is directly above you, the sound seems to come from a point behind the plane in a direction 30 from the vertical.The speed of the plane is:
A) the same as the speed of sound
B) half the speed of sound
C) three-fifths the speed of sound
D) 0.866 times the speed of sound
E) twice the speed of sound
Correct Answer:

Verified
Correct Answer:
Verified
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