Centre of pressure of a plane surface of arbitrary shape immersed vertically in a static mass of fluid
lies above the centroid of the plane surface.
is independent of the specific weight of the fluid.
is different for different fluids.
is at the centroid of the plane surface.
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Sodium tri poly phosphate (STPP) is manufactured by reaction of phosphoric acid with sodium
Phosphoric acid is produced in wet process from phosphate rock and
The fugacity of liquid water at 298 K is approximately 3171 Pa. Considering the ideal heat of vaporisation as 43723 J/gm mole, its fugacity at 300 K would be