A sealed cylinder of length l and cross-sectional area A contains N molecules of an ideal gas at kelvin temperature T.

What is the force acting on the area of the cylinder marked A due to the gas?

A.     \(\frac{{NRT}}{l}\)

B.     \(\frac{{NRT}}{{lA}}\)

C.     \(\frac{{N{k_B}T}}{{lA}}\)

D.     \(\frac{{N{k_B}T}}{l}\)

D