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Q.

A molecule of mass m of an ideal gas collides with the wall of a vessel with a velocity v and returns back with the same velocity. The change in the linear momentum of the molecule is

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a

2mv

b

4mv

c

5mv

d

10mv

answer is A.

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Detailed Solution

change in momentum =(final momentum - initial momentum) ∆p=mv-(-mv) ∆p=2mv
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