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A minivan moving at 38 m/s passes an unmarked state police car moving at 24 m/s. The electromagnetic waves produced by the radar gun in the police...

A minivan moving at 38 m/s passes an unmarked state police car moving at 24 m/s. The
electromagnetic waves produced by the radar gun in the police car have a frequency of
8.25 × 109 Hz. What is the magnitude of the difference in frequency between the waves
emitted by the gun and those that are reflected back from the speeding minivan?

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