The measured pressure in a liquid-filled cylinder is equivalent to which of the following?

a. The force necessary to compress its vol-ume within the cylinder
b. Its filling density divided by the cylinder gas factor
c. The pressure of the surface vapor at any given temperature
d. The weight of the liquid divided by the density of water

ANS: C
The pressure in a liquid-filled cylinder thus equals the pressure of the vapor at any given temper-ature.