Legend has it that Archimedes was asked by King Hiero of Syracuse to determine whether a crown was of pure gold or had been adulterated with a lesser metal by an unscrupulous goldsmith. It was this problem that led him to the principle that bears his name. In a modern version of his method, a crown weighing 8.30 N is suspended underwater from a string. The tension in the string is measured to be 7.81 N. Is the crown pure gold? (The density of pure gold is 19,300 kg/m3
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.
Legend has it that Archimedes was asked by King Hiero of Syracuse to determine whether a crown was of
pure gold or had been adulterated with a lesser metal by an unscrupulous goldsmith. It was this problem that
led him to the principle that bears his name. In a modern version of his method, a crown weighing 8.30 N is
suspended underwater from a string. The tension in the string is measured to be 7.81 N. Is the crown pure
gold? (The density of pure gold is 19,300 kg/m3
.)
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