A source emits sound of frequency 600 Hz...

A source emits sound of frequency 600 Hz inside water. The frequency heard in air will be

300 Hz

120 Hz

600 Hz

6000 Hz

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A train,standing at the outersignal of a railway station blows a whistle of frequency 400 Hz in still air. What is the frequency of the whistle for a platform observer when the train. recedes from the platform with a speed of 10 m s^-1 ?

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A train standing at the outer signal of a railway station blows a whistle of frequency 400 Hz in still air .The train begins to move with a speed of 10ms^(-1) towards the platform. What is the frequency of the sound for an observer standing on the platform?(sound velocity in air = (330ms^(-1)) )

MODERN PUBLICATION-SOUND-EXERCISE

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