Question

A microphone of surface area 2.0 cm2absorbs 1.1 mW of sound. What is the intensity of sound hitting the microphone?
A) 2.2 x 10-5W/m2
B) 0.55 W/m2
C) 2.2 W/m2
D) 2.8 W/m2
E) 5.5 W/m2

Answer

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