Consider a gas with density ρ and ¯c as the root mean square velocity of its molecules contained in a volume. If the system moves as whole with velocity v, then the pressure exerted by the gas is
A
13ρ¯c2
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B
13ρ(c+v)2
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C
13ρ(¯c−v)2
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D
13ρ(c−2−v)2
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