SOLUTION: The acoustical intensity I of a sound wave is proportional to the square of the pressure amplitude P and inversely proportional to the velocity v of the wave. If I = 0.472
W/ m2 f
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Question 1188510: The acoustical intensity I of a sound wave is proportional to the square of the pressure amplitude P and inversely proportional to the velocity v of the wave. If I = 0.472
W/ m2 for P = 25.0 Pa and v = 352 m/s, find I if P = 20.0 Pa and v = 320 m/s.
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
I=kP^2/v
0.472=k*25^2/352
so k=0.2658
-
use that in second part
I=0.2658*20^2/320
=0.332 W/m^2
decrease in the numerator of 1/3 and decrease in denominator of about 0.1, so expect an overall decrease.
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