How fast was the moving car going

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A parked police car emits a sound of frequency 1348 Hz that bounces off a car and returns with a frequency of 1387 Hz. The police car is parked on the side walk of a road so the moving car is traveling directly toward or away from it.

(a) How fast was the moving car going? Was it moving toward or away from the police car?

(b) What frequency would the police car have received if it had been traveling toward the other car at 20.0 m/s?

Reference no: EM132582684

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