Chapter 24: Class 7 Science Exam Tests
Class 7 Science MCQs - Chapter 24
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MCQ 136: The thing which also effects the sound produced by vibrating strings, is
MCQ 137: The number of things that effect the sound produced by vibrating strings is
MCQ 138: When air vibrates in a short thin tube, the level of note is
MCQ 139: A wave with ups and downs is known as
MCQ 140: The rock concerts have sound level up to
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