An Ambulance Is Generating a Siren Sound at a Frequency

An ambulance is generating a siren sound at a frequency of 2,000 Hz. The speed of sound is 345.0 m/s. The observer and the ambulance are traveling toward each other at a velocity of 24.00 m/s. If the ambulance is stationary, what is the frequency of the siren perceived by the observer?

A) 2,640 Hz
B) 2,559 Hz
C) 2,324 Hz
D) 2,139 Hz
E) 2,003 Hz

Correct Answer:

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