A driver travels northbound on a highway at a speed of 260, Ask an Expert

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A driver travels northbound on a highway at a speed of 26.0 m/s. A police car, traveling southbound at aspeed of 42.0 m/s approaches with itssiren producing sound at a frequency of 2500 Hz.

(a) What frequency does the driver observe asthe police car approaches?

(b) What frequency does the driver detect by after the police carpasses him?

frequency as the police car approaches

frequency after the police car passes

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