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A police car is pursuing someone on the road. The police car's siren has a frequency of 1000 Hz. The police car has a velocity

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A police car is pursuing someone on the road. The police car's siren has a frequency of 1000 Hz. The police car has a velocity of 38 m/s and the car it is pursing has a velocity of 11 m/s. What frequency would the driver hear as the police car approaches? Assume speed of sound is 343 m/s

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