if the density of airr at N.T.P. is 1.25`kg//m^(3)`, then the r.m.s. velocity of air molecules at N.T.P. will be
if the density of airr at N.T.P. is 1.25`kg//m^(3)`, then the r.m.s. velocity of air molecules at N.T.P. will be
A. 0.50 km/s
B. 0.48 km/s
C. 0.96 km/s
D. 0.64 km/s
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