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.
Archimedes' thrust is the vertical force oriented upwards experienced by a body immersed in a liquid (allowing it to float). This force corresponds to the weight of the volume of the displaced liquid. For example, a object immersed in water (density 1000 kg / m3 ) will undergo a flare of Archimedes of 9810 N for each cubic meter of its submerged volume (i.e. 9, 81 m / s2 1000 kg / m3 1 m3 = 9810 N).
A buoy is made from a steel tube 4 meters long and 0.5 radius meter to which we welded a half-sphere at each end. Knowing that the weight of the buoy is 3630 N say what will be the immersion height of this buoy if it is submerged in fresh water (density 1000 kg / m3 ).
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