An important concept in both liquids and gasses is pressure.
Pressure is defined as the force per unit area.
Similarly a pressure of 1,000Pa acting on an area of 3m 2 will produce a force of 3,000N. Gravity acting on a liquid will tend to cause the liquid to deform so that the liquid is as close to the center of the earth as possible. If the liquid is confined by the walls of a container, i.e. jar, the liquid will deform to make the surface of the liquid as close to the center of the earth as possible. Gravity acting on a static liquid will produce a pressure in the liquid. This pressure will increase as you move down in the liquid. However, the pressure at C is the same as the pressure at B, i.e. the pressure will not change as you move horizontally, only vertically.