O Level Physics Study App | Introduction to Sound MCQ e-Book PDF
O Level Physics MCQs (O Level) From Textbook

O Level Physics MCQs – Certification Test 223

Introduction to Sound MCQ (Question 223) – App & e-Book Download

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MCQ 223: Compressions are formed where air pressure is:

  1. higher
  2. lower
  3. normal
  4. zero

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Introduction to Sound MCQ App Download: iOS & Android Apps

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