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If a 1.00-kHz sound source moves at a speed of 53.0 m/s toward a listener who...

If a 1.00-kHz sound source moves at a speed of 53.0 m/s toward a listener who moves at a speed of 28.0 m/s in a direction away from the source, what is the apparent frequency heard by the listener? (Use 343 m/s as the speed of sound in air.)

A) 795 Hz

B) 937 Hz

C) 1000 Hz

D) 1086 Hz

E) 1279 Hz

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