Physics, 05.10.2019 20:00 payshencec21

You stand by the railroad tracks as a train passes by. you hear a 1 000-hz frequency when the train approaches, which changes to 800 hz as it goes away. how fast is the train moving? the speed of sound in air is 340 m/s.

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You stand by the railroad tracks as a train passes by. you hear a 1 000-hz frequency when the train...