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Statement of a problem № 11142

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Suppose that a police car is moving to the right at 27 m/s, while a speeder is coming up from behind at a speed of 39 m/s, both speeds being with respect to the ground. Assume that the electromagnetic wave emitted by the police car s radar gun has a frequency of 8.0 × 109 Hz. Find the difference between the frequency of the wave that returns to the police car after reflecting from the speeder s car and the original frequency emitted by the police car.




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