Sound Worksheet-1
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Sound Worksheet-2
A. 25 hertz B. 50 hertz
C. 75 hertz D. 1/25 hertz
A. 1/20 hertz B. 40 hertz C. 10 hertz D. 20 hertz
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Sound Worksheet-3
A. 2 B. 0.2 C. 20 D. 200
A. water B. wax C. vacuum D. empty vessel
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