Using the definition of pressure as force/area and the force being the weight of liquid on the area of the bottom of the container, and weight being the mass x the acceleration due to gravity, led to the fact that the pressure of the liquid depends on the gravity, density and depth. The density of a liquid was related to the weight of the liquid compared to the weight of an equal volume of water. Mercury, with a density of 13.6, exerts 13.6 times the pressure on the bottom of a container as does an equal volume of water. ( density of 1). The apparent loss of weight was related to the bouyancy of the object in the liquid. The bouyant force was shown to be the NET upward force exerted on an object by a fluid. Archimedes principle was defined using the bouyant force on a immersed object being equal to the weight of the fluid it displaced. Assignment: textbook questions from 3 chapters to be handed in on Thursday