22. If a cube of iron with sides 1 m and density 7.87 g/cm^3 sinks in salt water of density 1.02 g/cm^3, how deep will it proceed in the ocean before it stops sinking? A. 1 m B. 8 m C. Between 50 and 100 m D. It will reach the ocean floor.
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.
22. If a cube of iron with sides 1 m and density 7.87 g/cm^3 sinks in salt water of density 1.02 g/cm^3, how deep will it proceed in the ocean before it stops sinking?
A. 1 m B. 8 m
C. Between 50 and 100 m
D. It will reach the ocean floor.
23. If 1 liter of gasoline has a density of 0.77 kg/L, and it goes on to evaporate, where it takes up a volume of 15.4 L. Which of the following is conserved (constant) during this process:
A. mass, pressure and volume
B. Only mass
C. Only volume
D. Mass and volume
24. Consider two blocks of the same size and shape, one made of aluminum and the other made of steel. Both sink in water. Which of the following statements are not true:
A. Both objects displace the same volume of water
B. Both objects experience the same acceleration if released on the surface of the water
C. Both objects displace the same mass of water
D. Both objects experience the same buoyant force
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