Class 7 Science MCQs (Grade 7) From Textbook
Class 7 Science MCQs App | Sound Waves e-Book PDF Download
Class 7 Science Competitive Exam MCQs – Practice Test 13 (Chapter 23)
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One example of string instrument is
The speed of sound in glass is
The microphone changes the sound waves into
Sounds are chiefly produced by
The distance between two points of a wave in a phase is known as
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