As you stand by the side of the road, a car approaches you at a constant speed, sounding its horn, and you hear a frequency of 80.0 Hz
After the car goes by, you hear a frequency of 60.0 Hz. What is the speed of the car? Assume that he speed of sound in air is 343 m/s.
A)
64 m/s
B)
49 m/s
C)
16 m/s
D)
36 m/s
E)
25 m/s
B
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