A Minivan Moving At 38 M S Passes An Unmarked State Police Car Moving At 24 M S

A minivan moving at 38 m/s passes an unmarked state police car moving at 24 m/s. Theelectromagnetic waves produced by the radar gun in the police car have a frequency of8.25 × 109 Hz. What is the magnitude of the difference in frequency between the wavesemitted by the gun and those that are reflected back from the speeding minivan?

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