specific gravity soil mechanics soil soil formation geotechnical engineering geotech properties of soil water content void ratio degree of saturation three phase diagram percentage air content air content porosity mass specific gravity true specific gravity saturated unit weight bulk unit weight dry unit weight unit weight fluid mechanics pressure measurement civil engineering mechanical engineering fluid properties fluid hydrostatics kinematics hydrostatics kinematics solid dynamics liquid gas incompressible fluid bulk modulus compressibility mach no. newton’s law of viscosity viscosity shear stress
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