Physics, 20.08.2019 19:30 devontemiles1174

Alight-rail commuter train blows its 200 hz horn as it approaches a crossing. the speed of sound is 339 m/s. (a) an observer waiting at the crossing receives a frequency of 220 hz. what is the speed of the train? m/s (b) what frequency does the observer receive as the train moves away? hz

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Alight-rail commuter train blows its 200 hz horn as it approaches a crossing. the speed of sound is...