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Physics · Oct / Nov 2017 · Paper 11 · Question 25

5054General properties of waves

As a sound wave travels from one medium to another, its wavelength increases. What happens to the frequency and to the speed of the sound?

  1. Afrequency decreases, speed decreases
  2. Bfrequency decreases, speed increases
  3. Cfrequency stays constant, speed decreases
  4. Dfrequency stays constant, speed increases

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Correct answer: D. frequency stays constant, speed increases

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