An alert physics student stands beside the tracks as a train rolls slowly past. He notes that the frequency of the train

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answerhappygod
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An alert physics student stands beside the tracks as a train rolls slowly past. He notes that the frequency of the train

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An alert physics student stands beside the tracks as a train
rolls slowly past. He notes that the frequency of the train whistle
is 491 Hz when the train is approaching him
and 478 Hz when the train is receding from him. Using
these frequencies, he calculates the speed of the train. What value
does he find? (Assume the speed of sound in air is 343 m/s.)
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