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Class 7 Science MCQs – Certification Test 126

Sound Waves and Noise MCQs (Question 126) – App & e-Book Download

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MCQ 126: Sound is measured by units that are called:

  1. Hertz (Hz)
  2. Decibels (dB)
  3. Meters (m)
  4. Pascal (Pa)
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Sound Waves and Noise MCQs App & e-Book – Class 7 Science Learning Guide

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