A point source emits 33.1 W of sound isotropically. A small microphone intercepts the sound in an area of 0.173 cm2, 200 m from the source. Calculate (a) the sound intensity there and (b) the power intercepted by the microphone. Please explain part b. I know that 1.139E-4 and 1.139E-10 are wrong answers for part b. I know that part A is correct. (a) Number 6.585E-5 Units W/m^2 (b) Number Units W
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Please explain part B. I know that 1.139E-4 and 1.139E-10 are incorrect answers for part B. I know that the answer for part A is correct.
Given :
P = 33.1 W
A = 0.173 cm2 = 0.173 x 10-4 m2
r = 200 m
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