Two different sized boxes, P and Q, both contain the same number of nitrogen
molecules. The molecules in box P have twice the root mean square speed of those in box Q. Which of the following must be correct?
A The density of the gas in box P is greater than that in box Q.
B The mean momentum of the molecules in box P is greater than those in box Q.
C The pressure exerted by the gas in box P is greater than that in box Q.
D The temperature of the gas in box P is greater than that in box Q.