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Gulzar Russell from Kendriya Vidyalaya No.1, Calicut
Subject :NSO    Class : Class 8
Loudness of sound increases with the A. Amplitude of vibrating body. B. Increase in surface area of vibrating body. C. Decrease in frequency of vibrating body. D. Increase in distance from the source of sound.

Ans 1:

Harshit from Army Public School, Lucknow
Class : Class 9
Hi friend. The ans is (A) amplitude of vibrating body. HOPE THIS HELPS!!!!

Ans 2:

AAshutosh Jindal from HOLY angels school, RAJPURA
Class : Class 8
The ans is A,B

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