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Posts: 3561
12 years ago
A factory siren indicating the end of a shift has a frequency of 80 Hz. What frequency is perceived by the occupant of a car traveling away from the factory at 30 m/s? The speed of sound in air is 343 m/s.
A) 73 Hz
B) 75 Hz
C) 77 Hz
D) 79 Hz
E) 81 Hz
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Educator
12 years ago
A
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