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Physics (AS & A Level) · Oct / Nov 2017 · Paper 11 · Question 22

9702Progressive waves

The displacement-time graph for a layer of air in the path of a sound wave is shown. Which wave quantity is increasing?

  1. Aamplitude
  2. Bfrequency
  3. Cperiod
  4. Dwavelength

As printed in the paper

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Correct answer: B. frequency

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