Use the following scenario for the next two questions. A U tube is initially filled with mercury (p = 13.5 x 103 kg-m³) to the same height on both sides of the tube. A stopper with a pressure gauge is then inserted on the right-hand side of the tube. Mercury is slowly removed from the left-hand side of the tube until the level on the right- hand side drops by Ah₂ = 0.10 cm and the pressure gauge reads Pgauge =-1500 Pa. The removal of the mercury is a quasistatic process and the system is in excellent thermal contact with its environment. 13( Ah₁ Initial height ) By how much does the mercury level drop on the left-hand side of the tube Ah,? 0.11 cm B.) 1.2 cm 7.4 cm D. 11 cm E. 76 cm = P. + fgch.-ha) P₂ h₁ = P-Patm+hz 1.0 cm 19 Pgauge Air Ah, (0.001) Mercury

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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.