question_answer

The rms speed of the molecules of a gas in a vessel is\[400\text{ }m{{s}^{-1}}\]. If half of the gas leaks out, at constant temperature, the rms speed of the remaining molecules will be:

A)  \[800\,m{{s}^{-1}}\]                                      

B)  \[400\sqrt{2}\,m{{s}^{-1}}\]      

C)         \[400\,m{{s}^{-1}}\]                      

D)  \[200\,m{{s}^{-1}}\]

E)  \[200\sqrt{2}\,m{{s}^{-1}}\]