Physics, 18.09.2019 17:30 thil3746

a train moving at a speed of 40.0 m/s sounds its whistle, which has a frequency of 500 hz. determine the frequency heard by a stationary observer as the train approaches the observer also find the frequency heard by the stationary observer as the train recedes from the observer.
i need the frequency as the train !

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a train moving at a speed of 40.0 m/s sounds its whistle, which has a frequency of 500 hz. determine...