The two isotopes of uranium. ²³⁵U (atomic mass 235.04 amu) and ²³⁸U (atomic mass 238.05 amu), can be separated by a gas-diffusion process by combining them with fluorine to make the gaseous compound UF₆ (atomic mass of fluorine is 18.998 amu). Calculate the ratio of the rms speeds of these molecules for the two isotopes, at constant T. Express your answer using five significant figures.
