Gas at a pressure ${P_0}$ in contained is a vessel. If the masses of all the molecules are halved and their speeds are doubled, the resulting pressure $P$ will be equal to
A$4{P_0}$
B$2{P_0}$
C${P_0}$
D$\frac{{{P_0}}}{2}$
Medium
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B$2{P_0}$
b ${v_{rms}} = \sqrt {\frac{{3P}}{\rho }} = \sqrt {\frac{{3PV}}{m}} $
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