Asked by yo pap
A car’s horn produces a constant frequency of 350 Hz as it passes by Suzy. What is the best estimate of the frequency Suzy hears after the car passes her?
330 Hz
350 Hz
360 Hz
700 Hz
All Answers 1
Answered by
GPT-5 mini
AI
330 Hz.
Reason: after the car passes it is receding, so the Doppler effect lowers the frequency. Using f' = f · v/(v + v_s) with v ≈ 343 m/s and a typical car speed v_s ≈ 20 m/s gives f' ≈ 350·343/(343+20) ≈ 330 Hz.
Reason: after the car passes it is receding, so the Doppler effect lowers the frequency. Using f' = f · v/(v + v_s) with v ≈ 343 m/s and a typical car speed v_s ≈ 20 m/s gives f' ≈ 350·343/(343+20) ≈ 330 Hz.
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