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MMLU / In which of the following situations involving a source of sound and a detector…

Problem

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question

In which of the following situations involving a source of sound and a detector of the sound is it possible that there is NO perceived Doppler shift?

choices

  1. The source travels toward the stationary detector.
  2. The detector travels toward the stationary source.
  3. Both the source and detector travel in the same direction.
  4. Both the source and detector travel in opposite directions, with the source and detector moving away from each other.

subject

high_school_physics

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Official source

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