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The frequency of a train horn is 500 Hz. Assume the speed of sound in air is 340 m/s. What is the frequency heard by an observer if the observer is approaching the train with a speed of 30.0 m/s?

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The frequency of a train horn is 500 Hz. Assume the speed of sound in air is 340 m/s. What is the frequency heard by an observer if the observer is approaching the train with a speed of 30.0 m/s?






 
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