Aturning fork produces a feeble sound. but when it is pressed against a table, a loud sound is heard. why?

loudness of a sound varies with area of a vibrating body.

Explanation:

when a tuning fork is pressed against a rubber pad a feeble sound is heard because of the smaller area of pad but when a vibrating tuning fork is placed vertically on the table the surface area increases and so the loudness of a sound increases.

answer: the correct answer is   air pressure at the top of mount everest is higher than at the bottom of the grand canyon.

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explanation: