(a) A large, open at the top, upright cylindrical tank contains a brine with a density of 1.23 x 10³ kg/m³. If the air pressure is 101.3 kPa, determine the absolute pressure (in Pa) i the fluid at a depth of 31.0 m. 373775.3 The absolute pressure at any point in the fluid is the sum of atmospheric pressure and the pressure due to the depth of the fluid. Did you remember to account for atmospheric pressure? Pa (b) Determine the force (in N) exerted by only the fluid on the window of an instrument probe at this depth if the window is circular and has a diameter of 3.30 cm.
Fluid Pressure
The term fluid pressure is coined as, the measurement of the force per unit area of a given surface of a closed container. It is a branch of physics that helps to study the properties of fluid under various conditions of force.
Gauge Pressure
Pressure is the physical force acting per unit area on a body; the applied force is perpendicular to the surface of the object per unit area. The air around us at sea level exerts a pressure (atmospheric pressure) of about 14.7 psi but this doesn’t seem to bother anyone as the bodily fluids are constantly pushing outwards with the same force but if one swims down into the ocean a few feet below the surface one can notice the difference, there is increased pressure on the eardrum, this is due to an increase in hydrostatic pressure.
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