8. The weight density of a soil is given by y = 15+ 0.75h, where y is in KN/m³, and h is in meters. Determine the pressure, in kPa, at a depth of 4m. 9. Calculate the density of water vapor at 350 kPa abs and 20°C if its gas constant is 0.462 kPa – m³/kg – °K.

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Properties of Fluids

The term fluid represents a type of substance that can easily change its shape under any external pressure/force and can flow. Fluids can acquire any shape in which it is stored and can resist normal stresses but cannot resist shear stress in rest condition. Whenever external shear stress is applied to fluids, it starts to flow. The fluids may be liquid or gas. Example- water, air, etc.