Fundamentals of Physics 10th ISV Edition · Waves-II · Problem 19
Halliday, Resnick & Walker — Waves-II: Problem 19
19 A point source emits 30.0 W of sound isotropically. A small microphone intercepts the sound in an area of 0.750 cm², 180 m from the source. Calculate (a) the sound intensity there and (b) the power intercepted by the microphone.
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