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A gas is enclosed in a cube of side l. W...

A gas is enclosed in a cube of side l. What will be the change in momentum of the molecule, if it suffers an elastic collision with the plane wall parallel to yz-plane and rebounds with the same velocity ?
`[(V_(x), V_(y) & V_(z))` initial velocities of the gas molecules]

A

`mv_(x)`

B

zero

C

`-mv_(x)`

D

`-2mv_(x).`

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