Part A - A cube of volume 3.0 ×10-3 m3 (3.0 L) is placed on a scale in air. The scale reads 267 N. What is the material? Answers: Copper, ρ = 8.9 × 103 kg/m3 Aluminum, ρ = 2.7 × 103 kg/m3 Gold, ρ = 19 × 103 kg/m3 Lead, ρ = 11 × 103 kg/m3
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.
Part A -
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A cube of volume 3.0 ×10-3 m3 (3.0 L) is placed on a scale in air. The scale reads 267 N. What is the material? |
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Part B - An aluminum block of volume 200 × 10-6 m3 is held by a string at rest in oil as shown. ρAL = 2700 kg/m3, ρoil = 900 kg/m3, and g = 10 m/s2.
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Now the same block is placed in water, still completely submerged. Water is more dense than oil. The net force on the block will ______.
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Part C -
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Now the same block is placed in water, still completely submerged. Water is more dense than oil. The buoyant force on the block will ______.
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Part D -
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Now the same block is placed in water, still completely submerged. Water is more dense than oil. The tension in the string will ______.
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