N molecules, each of mass m, of gas A and 2 N molecules, each of mass 2 m, of gas B are contained in the same vessel which is maintained at a temperature T. The mean square of the velocity of molecules of B type is denoted by ν^2 and the mean square of the X component of the velocity of A type is denoted by ω^2. The ratio of ω^2/ν^2 is