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Physics, 20.08.2019 20:30 ilovecatsomuchlolol
Asiren on the top of the police car emits sound at frequency of 823 hz. the car is approaching a bystander on a sidewalk at speed 39.5 m/s. what is the freguency the bystander hears? assume the speed of sound in air to be 340 m/s.
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