Question

A commuter train passes a passenger platform at a constant speed of 36.6 m/s. The train horn is sounded at its characteristic frequency of 320 Hz.

(a) What overall change in frequency is detected by a person on the platform as the train moves from approaching to receding? (Indicate whether the frequency increases of decreases with the sign of your answer.) ___Hz

(b) What wavelength is detected by a person on the platform as the train approaches? ____m

Answer 1

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