Class 8 Science e-Book's MCQs - Complete
Pitch and Loudness MCQ App & e-Book Download - 33
Apps:
MCQ:
Sound having frequencies above 20000Hz are called
- infrasound
- ultrasound
- mega sound
- micro sound
b
Class 8 Science App & e-Book Tests PDF Download
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8th Grade Science MCQs eBook Download
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Class 8 Science Quiz with Answers
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