- Density (ρ):
The mass per unit volume of a material, usually measured in pounds per cubic foot (lb/ft³) or kilograms per cubic meter (kg/m³). - Specific Weight (γ):
Defined as the weight per unit volume of a material, measured in pounds per cubic foot (lb/ft³) or Newton’s per cubic meter (N/m³). - Specific Gravity:
The ratio of the specific weight of a material to that of water at a given temperature. - Static Pressure:
The pressure of stationary fluids or gases.
Definitions
Dynamic Pressure:
The pressure exerted by a fluid or gas when it impacts a surface due to its motion or flow. It can be calculated as the difference between points B and A.
Impact Pressure (Total Pressure):
The sum of static and dynamic pressures on a surface, shown at point.