Properties of Fluids in Fluid Mechanics mass density, weight density, specific volume, specific gravity, viscosity. Lets understand these properties of fluids one by one in detail. The knowledge of these properties is very essential to make the study of fluid mechanics comprehensive. The properties of fluids are as follows 1. Density or mass density 2. Specific weight or Weight density 3. Specific volume 4. Specific Gravity 5. Viscosity 1. Density or Mass Density: It is defined as the ratio of the mass of the fluid to its volume. It is represented by the symbol ρ (rho). The unit of density is Kg per cubic metre (Kg/m3) The density of liquid is taken as constant while the density of the gases changes with the change in the pressure and temperature .In mathematical form the density is given as The value of the mass density for the water is 1000 Kg/m3. 2. Specific Weight or Weight Density When the ratio of weight of the fluid to the volume ...