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Brelou Brelou
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A car horn emits a frequency of 400 Hz. A car traveling at 20.0 m/s sounds the horn as it approaches a stationary pedestrian. What frequency does the pedestrian hear? The speed of sound in air is 343 m/s.
A) 200 Hz
B) 375 Hz
C) 400 Hz
D) 425 Hz
E) 450 Hz
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Physics

Physics


Edition: 4th
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Quantum physics thus reveals a basic oneness of the universe.
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longhairlonghair
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