An Ambulance Is Generating a Siren Sound at a Frequency

question 24

Multiple Choice

An ambulance is generating a siren sound at a frequency of 2,400 Hz. The speed of sound is 345.0 m/s. The observer is traveling at a velocity of 24.00 m/s toward the ambulance and the ambulance is traveling at a velocity of 24.00 m/s toward the observer. What is the frequency of the siren perceived by the observer?

• A) 2,100 Hz
• B) 2,250 Hz
• C) 2,430 Hz
• D) 2,550 Hz
• E) 2,759 Hz

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