Q: A cylinder contains two type of gases A and B. number of molecules of gas A in cylinder is N , each having a mass m. number of molecules of gas B in cylinder is 2 N, each having a mass 2 m . The mean square of x-component of velocity of A is vAx2 and mean square of x-component of velocity of B is vBx2. The ratio of vAx : vBx is
(a) 1 : 1
(b) 2 : 1
(c) 1 : √2
(d) √2 : 1
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Ans: (d)