Practice Quiz

AP Physics B Practice Exam

Category - Introductory Physics

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The source of a sound is moving away from an observer who is standing still. How do the sound waves received by the observer compare with those emitted by the source?
  1. They are heard as having a greater velocity.
  2. They are heard as having a higher frequency.
  3. They are heard as having a lower frequency.
  4. They are heard as having a smaller wavelength.
Explanation
Answer: C - They are heard as having a lower frequency.
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