1) An ambulance is generating a siren sound at a frequency of 2,000 Hz. The velo
ID: 1979799 • Letter: 1
Question
1) An ambulance is generating a siren sound at a frequency of 2,000 Hz. The velocity 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
2) An ambulance is generating a siren sound at a frequency of 2,400 Hz. The velocity of sound is 345.0 m/s. If the ambulance is traveling at a velocity of 24.00 m/s toward the stationary observer, then what is the frequency of the siren perceived by the observer?
A) 2,579 Hz
B) 2,540 Hz
C) 2,525 Hz
D) 2,500 Hz
E) 2,480 Hz
Explanation / Answer
f=f0*(c-v)c=2400*(345-24)/345=2233Hz
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