4. A submarine can safely resist an external pressure of 1000 psig. How deep in the ocean can it safely dive? Provide solution in feet and assume density of sea water is 64.17 lbm/ft³. Show clearly your handling of units for full credit. 5. Your company is drilling a deep oil well in Texas. Fluids pressure encountered in that well at 15000 ft was 10000 psig. Compute the minimum required density needed to drill safely and prevent a blowout. Express your result in Lbm/gal since these are the required units in the oil field. Show explicitly your handling of units.
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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