6. A submerged can of Coke® will sink, but a can of D Coke will float. (Try it!) Explain. 7. Why don't ships made of iron sink? 8. A barge filled high with sand approaches a low bridge the river and cannot quite pass under it. Should sar added to, or removed from, the barge? [Hint: Co Archimedes' principle.] 9. Explain why helium weather balloons, which are u measure atmospheric conditions at high altitudes, a mally released while filled to only 10–20% of their m
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.
![6. A submerged can of Coke® will sink, but a can of Diet
Coke will float. (Try it!) Explain.
7. Why don't ships made of iron sink?
8. A barge filled high with sand approaches a low bridge over
the river and cannot quite pass under it. Should sand be
added to, or removed from, the barge? [Hint: Consider
Archimedes' principle.]
9. Explain why helium weather balloons, which are used to
measure atmospheric conditions at high altitudes, are nor-
mally released while filled to only 10–20% of their maximum
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