In the kinetic theory of gases,a molecule of | vedclass

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(A) When a molecule of mass $m$ collides elastically with a wall of a vessel with velocity $V$,it rebounds with the same speed in the opposite directi

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$2mV$

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(A) When a molecule of mass $m$ collides elastically with a wall of a vessel with velocity $V$,it rebounds with the same speed in the opposite direction.Initial momentum of the molecule,$p_i = mV$.Final momentum of the molecule,$p_f = -mV$.The change in linear momentum,$\Delta p = p_f - p_i = -mV - (mV) = -2mV$.Since the question asks for the magnitude of the change in linear momentum,the change is $2mV$.

In the kinetic theory of gases,a molecule of mass $m$ of an ideal gas collides with a wall of a vessel with velocity $V$. The change in the linear momentum of the molecule is

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