10) intensity = P/A = 111/4pi*10.7^2
= 0.76 W/m^2
b) dB = 10 log ( I /Io)
dB = 10 log ( 0.76 / 10^-12)
dB = 118.8 dB
c) dB = 10 log(I/Io)
120 = 10 log(I/10^-12)
I = 1 W/m^2
Area = P/I
4pi*r^2 = 111/1
4pi*r^2 = 111
r = 2.97 m
An outside loudspeaker (considered a small source) emits sound waves with a power output of 111...
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