The density of a floating body can be determined by tying weights to the body until both the body and the weights are completely submerged, and then weighing them separately in air. Consider a wood log that weighs 1540 N in air. If it takes 34 kg of lead (r = 11,300 kg/m3) to completely sink the log and the lead in water, determine the average density of the log.
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.
The density of a floating body can be determined by
tying weights to the body until both the body and the weights
are completely submerged, and then weighing them separately
in air. Consider a wood log that weighs 1540 N in air.
If it takes 34 kg of lead (r = 11,300 kg/m3) to completely
sink the log and the lead in water, determine the average
density of the log.
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