Hydraulics & Fluid Mechanics
The total pressure force on a plane area is equal to the area multiplied by the intensity of pressure at the centriod, if

the area is vertical
the area is horizontal
All of these
the area is inclined

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Hydraulics & Fluid Mechanics
Fluid is a substance that

has the same shear stress.at a point regardless of its motion
always expands until it fills any container
cannot be subjected to shear forces
cannot remain at rest under action of any shear force

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