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A police car sounding a siren with a frequency of 1560 Hz is traveling at 110...

A police car sounding a siren with a frequency of 1560 Hz is traveling at 110 km/h . A.What frequencies does an observer standing next to the road hear as the car approaches and as it recedes? Express your answers using three significant figures separated by a comma. B.What frequencies are heard in a car traveling at 90.0 km/h in the opposite direction before and after passing the police car? Express your answers using three significant figures separated by a comma.

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