Two spheres containing gas are connected to each other and to a tube which is connected to the atmosphere as shown in the diagram. The tubes have a liquid with density p= 3400 in it. The height (measured from the lowest point in the liquid) of the top of the liquid exposed to the atmosphere is za = 52cm, the height of the liquid exposed to sphere ‘B' is z = 23cm, and the height of the liquid exposed to sphere 'C' is ze = 78cm. Atmosphere 12 ZAI 11. Which best describes the relations between the pressures in spheres 'B' and 'C' (p, and pe respectively) and the atmospheric pressure Patm- (a) Patm

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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.