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.A train,standing at the outersignal of ...

.A train,standing at the outersignal of a railway station blows a whistle of frequency 400 Hz in still air. What is the frequency and speed of sound in each case ? (a) approaches the platform with a speed of 10ms^(-1) , (b) receeds from the platform with a speed of 10ms^(-1)? (ii) The speed of sound in still air can be taken as 340ms^(-1)

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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 approaches the platform with a speed of 10 m s^-1

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