The rms velocity of an ideal gas at $27^{\circ}C$ is $0.3\;m/s$. Its rms velocity at $927^{\circ}C$(in m/s.) is :

$(a)\;3.0 \qquad (b)\;2.4 \qquad (c)\;0.9 \qquad (d)\;0.6$

(d) 0.6
answered Nov 7, 2013 by