Assume that you can create a perfect vacuum ( P=0 ) at the top of the vertical tube shown in the figure. Mercury fills a reservoir and is subject to standard atmospheric pressure. You place the bottom of the tube at the very top of the mercury level in the reservoir and require it to stay there at all times (so fluid is just shy of being displaced). Not a flow problem ρHg = 13593 kg/m3 , Patm = 1.013 x 105 Pa a) What is the height in INCHES the mercury reaches inside the evacuated tube?
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.
Assume that you can create a perfect vacuum ( P=0 ) at the top of the vertical tube shown in the figure. Mercury fills a reservoir and is subject to standard atmospheric pressure. You place the bottom of the tube at the very top of the mercury level in the reservoir and require it to stay there at all times (so fluid is just shy of being displaced). Not a flow problem
ρHg = 13593 kg/m3 , Patm = 1.013 x 105 Pa
a) What is the height in INCHES the mercury reaches inside the evacuated tube?
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