Questions
A whistle giving out 450 Hz approaches a stationary observer at a speed of 33 m/s. The frequency heard by the observer in Hz is (speed of sound is 330 m/s)
a
409
b
429
c
517
d
500
detailed solution
Correct option is D
The apparent frequency heard by the observer is given by n'=vv−vSn=330330−33×450=330297×450=500 HzTalk to our academic expert!
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An observer is moving towards the stationary source of sound, then
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