Question #330732

Determine the frequency of sound heard by a stationary listener when a moving siren emits 550Hz and travels away at 50m/s from the listener assuming the air temperature is 20 degree Celsius.




1
Expert's answer
2022-04-20T10:13:02-0400
f=f0cc+vf=f_0\frac{c}{c+v}

f=550343343+50=480  Hzf=550*\frac{343}{343+50}=480\;\rm Hz


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