Answers

2016-01-07T20:06:04+05:30
Sound is mechanical energy which produces sensation of hearing.
It is produce by the vibrating body cause the vibration of medium like air.
for a clear sound we need medium which are having less space between them like solid.
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2016-01-08T11:14:21+05:30
i hope it helps...................
see the attached document ......................
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