[填空题]
One means of enriching uranium is by diffh 5myia5de p3d.6wav 4usion of thqxfa51x 5.xkowf / r(le gas $\text{UF}_6$. Calculate the ratio of the speeds of molecules of this gas containing $_{92}^{235}\text{U}$ and $_{92}^{238}\text{U}$ on which this process depends. :1