A police car sounding a siren with a frequency of1280 Hz

Chapter 16, Problem 16.65

(choose chapter or problem)

A police car sounding a siren with a frequency of1280 Hz is traveling at 120.0 km/h. (a) What frequenciesdoes an observer standing next to the road hear as the carapproaches and as it recedes? (b) What frequencies areheard in a car traveling at 90.0 km/h in the opposite directionbefore and after passing the police car? (c) The policecar nasses a car traveling in the same direction at 80.0 km /h.

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