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A jet of gas consists of molecules of mass m, speed v and number density n all moving
co-linearly. This jet hits a wall at an angle 0 to the normal. The pressure exerted on the
wall by the jet assuming elastic collision will be
(a) p= 2mnv² cos? 0
(b) р %3D 2тпv? cos 6
(c) p = V(3/2)mnvcos? 0
(d) p=mnv²

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