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.
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![1. A block of metal weighs 40 N in air and 30 N in water. What is the buoyant force of the water? Ans: 10 N
2. A 4.00-kg cylinder of solid iron is supported by a string while submerged in water. What is the tension in the string? (The specific
gravity of iron is 7.86.) Ans: 34.2 N
3. A crane lifts a steel submarine (density = 7.8 103 kg/m3) of mass 20,000 kg. What is the tension in the lifting cable (1) when the
submarine is submerged, and (2) when it is entirely out of the water? Ans: (1) 1.7 x 10^5 N. (2) 2.0 x 10^5 N
4. A 1.0-m3 object floats in water with 20% of it above the waterline. What does the object weigh out of the water? Ans: 7,840 N
5. A solid object floats in water with three-fourths of its volume beneath the surface. What is the object's density? Ans: 750 kg/m^3](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fd04e4f4b-64e2-4697-be0d-7e1c8e3b86c7%2F961fedfc-80b5-4af8-83d4-1eb41fb41190%2Fc0gjj9l_processed.png&w=3840&q=75)
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