Basic fluid -2
Define density or mass density. Density of a fluid is defined as the ratio of the mass of a fluid to its volume. Density, ρ = mass/volume (Kg/m3) ρ water = 1000 Kg/m3 Define specific weight or weight density. Specific weight or weight density of a fluid is defined as the ratio between the weight of a fluid to its volume. Specific weight, γ = weight/volume (N/m 3 ) γ = ρg γwater = 9810 N/m 3 Define specific volume. Specific volume of a fluid is defined as the volume of fluid occupied by an unit wt or unit mass of a fluid. Specific volume vs = volume/ wt = 1/γ = 1/ρg ----- for liquids Specific volume vs = volume/ mass = 1/ρ ----- for gases What is specific gravity? Specific Gravity = Weight of the substance/ Weight of an equal volume of water OR Specific Gravity = Density of the substance/Density of water The same formulas are used to find the density of gases by substituting air for wat...