Physics, 28.08.2019 09:30 bangtann77

Apolice car is parked by the side of a highway and its siren emits a sound measuring 750 hz. as you approach the police car from a distance, you hear a change in the sound. the change is in the sound's

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Apolice car is parked by the side of a highway and its siren emits a sound measuring 750 hz. as you...