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Physics (AS & A Level) · Oct / Nov 2018 · Paper 11 · Question 21

9702Progressive waves

The graph shows the variation of a quantity P with a quantity Q for a sound wave travelling in air. What could P and Q be?

  1. Aamplitude / intensity
  2. Bfrequency / wavelength
  3. Cspeed / frequency
  4. Dwavelength / period

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Correct answer: D. wavelength / period

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