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Type: Multiple-Choice
Category: Waves and Sound
Level: Grade 11
Score: 1
Tags: Doppler Effect
Author: kieke
Last Modified: 2 years ago

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Waves and Sound Question

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Grade 11 Waves and Sound

A car horn has a frequency of 400 Hz. The car is moving away from an intersection at 20 m/s. The frequency heard by a woman standing at the intersection could be                .
  1. 390 Hz
  2. 400 Hz
  3. 410 Hz
  4. 420 Hz
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