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Physics (AS & A Level) · May / June 2023 · Paper 13 · Question 26

9702Stationary waves

The variation with distance x of the intensity I along a stationary sound wave in air is shown. The speed of sound in air is 340 m s–1. What is the frequency of the sound wave?

  1. A1700 Hz
  2. B2300 Hz
  3. C3400 Hz
  4. D6800 Hz

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Correct answer: A. 1700 Hz

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