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Class 10 Physics MCQs – Certification Test 322

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MCQ 322: Humans can hear sound up to the highest frequency of 20,000 Hz. If the wavelength of sound in air at this frequency at a temperature of 20° would be:

  1. 5.7×10-2
  2. 3.7×10-2
  3. 1.7×10-2
  4. 2.7×10-2

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