A source of sound S is moving with a vel...

A source of sound S is moving with a velocity `50 m//s` towards a stationary observer. The observer measures the frequency of the source as 1000 Hz. What will be the apparent frequency of the source when it is moving away from the observer after crossing him? The velocity of sound in the medium is `350 m//s`.

400 Hz

666 Hz

375 Hz

177.5 Hz

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