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A Car Approaches You at a Constant Speed, Sounding Its

Question 473

Multiple Choice

A car approaches you at a constant speed, sounding its horn, and you hear a frequency of 76 Hz. After the car goes by, you hear a frequency of 65 Hz. What is the frequency of the sound emitted
By the horn? The speed of sound in the air is 343 m/s.


A) 70 Hz
B) 68 Hz
C) 72 Hz
D) 69 Hz
E) 71 Hz

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