A monatomic gas is adiabatically compressed to $0\mathrm{.}44$ of its initial volume. How do each of the following quantities change?

$($A$)$ By what factor does the rms speed change?

vrms$,$fvrms$,0=.$

$($B$)$ By what factor does the mean free path change?

f$0=.$

$($C$)$ By what factor does the thermal energy of the gas change?

EfE$0=.$

$($D$)$ By what factor does the molar specific heat at constant volume change?