Class 7 Science MCQs (Grade 7) From Textbook
Sound Waves MCQ App Free Download | Class 7 Science e-Book PDF
Class 7 Science MCQs – Practice Test 2 (Chapter 23)
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The pitch of the note depends upon the
The caliber of instrumental note depends on the
One of the vibrations of the string makes
Sound waves are converted by
Sound is measured by units that are called
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