10. A small piece of steel is tied to a block of wood. When thewood is placed in a tub of water with the steel on top, halfof the block is submerged. Now the block is inverted so thatthe steel is under water. (i) Does the amount of the blocksubmerged (a) increase, (b) decrease, or (c) remain thesame? (ii) What happens to the water level in the tub whenthe block is inverted? (a) It rises. (b) It falls. (c) It remainsthe same.
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.
10. A small piece of steel is tied to a block of wood. When the
wood is placed in a tub of water with the steel on top, half
of the block is submerged. Now the block is inverted so that
the steel is under water. (i) Does the amount of the block
submerged (a) increase, (b) decrease, or (c) remain the
same? (ii) What happens to the water level in the tub when
the block is inverted? (a) It rises. (b) It falls. (c) It remains
the same.
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