Which of the following relations is correct for root mean square speed of a gas at temperature T?
(A) Vr.m.s=3 k Tm (B)Vr.m.s=8 k Tm π
(C) Vr.m.s=2 k Tm (D) Vr.m.s=m3 k T
Where k= Bolzmann constant,
m= mass of a molecule.
(A) Vr.m.s=3 k Tm