Doppler Effect: A train is traveling away from you at 120 km/h. It blows its whistle, and you hear a tone of 0.400 kHz. Take the speed of sound to be 340 m/s. What frequency does the whistle actually produce?
A. 444 Hz
B. 439 Hz
C. 364 Hz
D. 361 Hz
Answer: B
Physics & Space Science
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