MECH 237 Chapter Notes - Chapter 1: Intensive And Extensive Properties, Thermal Equilibrium, Phase Rule
20 Feb 2017
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F = ma: weight: the gravitational force applied to a body as determined by newton"s second law. Checking dimensions is a useful way to detect errors in calculations. Systems and control volumes: a system is a quantity of matter or a region in space chosen for study. Properties of a system: a characteristic of a system is called a property (examples: p, t, v and m, extensive properties: depend on the size of the system (total mass, total. The density of most gases is proportional to pressure and inversely proportional to temperature. Liquids and solids are mostly incompressible and density change with pressure is usually zero: specific gravity: (or relative density) the ratio of the density of a substance to the density of some standard substance at a specified temperature. Sg = (dimensionless: specific weight: the weight of a unit of volume of a substance. S = g (n/m3) (where g = gravitational acceleration)
