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Class 7 Science MCQs – Certification Test 69

Sound Absorption Trivia (Question 69) – Learning App & e-Book Download

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MCQ 69: In concert halls, soft materials and carpets are used to:

  1. increase sound waves
  2. absorb sound waves
  3. retract sound waves
  4. refract sound waves
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Sound Absorption Trivia App & e-Book – Class 7 Science Exam Prep

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