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Physics · May / June 2025 · Paper 12 · Question 27

5054Sound

Which row describes ultrasound waves?

  1. Alongitudinal, smaller than 20 kHz
  2. Blongitudinal, greater than 20 kHz
  3. Ctransverse, smaller than 20 kHz
  4. Dtransverse, greater than 20 kHz

As printed in the paper

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Correct answer: B. longitudinal, greater than 20 kHz

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