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Two Speakers Emit Coherent Sound Waves into the Open Air

Question 54

Multiple Choice

Two speakers emit coherent sound waves into the open air.One of them produces 75 W of power.If a microphone placed at 12 m from each of the two speakers receives a total intensity of 0.25 W/m2,what is the power output of the second speaker?


A) 151 W
B) 377 W
C) Need more info to solve.
D) 38 W

Correct Answer:

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