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A siren, mounted on a tower, emits a sound whose frequency is 2110 Hz. A person is driving a car away from the tower at a speed of 29.0 m/s. As the figure illustrates, the sound reaches the person by two paths: the sound reflected from the building in front of the car, and the sound coming directly from the siren. The speed of sound is 343 m/s. What frequency does the person hear for the (a) reflected and (b) direct sound?

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