Liquid in a state of equilibrium exerts pressure on the objects it meets, including its container. There are two forms, hydrostatic load or external forces. When used against a level surface, the liquid exerts equal force against all points of that surface. All points on an objectâ€™s surface are affected by vertical pressure when the object is completely submerged in a liquid thatâ€™s in a state of equilibrium. These vertical forces are buoyancy, and the concept by itself is more fully defined by Archimedesâ€™principle. When hydrostatic force is exerted on an area of liquid, this becomes (see post) hydrostatic pressure. Examples of these containers can be found in the manner in which a city disperses water, along with its fountains and artesian wells.