Physics, 12.08.2020 06:01, bqg464

A car moving at 36 m/s passes a stationary police car whose siren has a frequency of 500 Hz. What is the change in the frequency (in Hz) heard by an observer in the moving car as he passes the police car? (The speed of sound in air is 343 m/s.)

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A car moving at 36 m/s passes a stationary police car whose siren has a frequency of 500 Hz. What is...