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A detector is released from rest over he...

A detector is released from rest over height h a source of sound of frequency `f_(0) = 10^(3) Hz`. The frequency observed by the detector at time t is plotted in the graph. The speed of sound in air is `(g = 10 m//s^(2))`

A

330 m/s

B

350 m/s

C

300 m/s

D

310 m/s

Text Solution

Verified by Experts

The correct Answer is:
C
`f=f_(o)((v+g t)/(v))rArr (df)/(g t)=f_(o)(0+(g)/(v))`
`rArr (1000)/(30)=(1000xx10)/(v)rArrv=300 m//s`
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