Find the speed of the approaching police car

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Two police cars have identical sirens that produce a frequency of 560 Hz. A stationary listener is standing between two cars. One car is parked and the other is approaching the listener and both have their sirens on. The listener notices 5.2 beats per second. Find the speed of the approaching police car. (The speed of sound is 340 m/s.)

Reference no: EM13306136

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