cylindrical vessel of radius R and length L if one molecule is present in it then the motion of that one molecule can be described by radial and axial velocities as shown .now consider N identical molecule s .each has mass m .apply assumption of ktg .law of equipartition of energy which of following is correct expression for RMS speed of radial components of the gas sample is
a. √kt/m
b. √2kt / m
c. √kt/ 2m
d. √3 kt/ m​