1 - 2. A hydraulic press has pistons of area .0060m? and 0.350m² respectively. A force of 25N is applied to the smaller piston. What is the lifting force on the bigger piston? 3 - 5. How high in m should an intravenous bag be for a liquid to just enter the vein? Assume that the density of the fluid is equal to that of water and the blood pressure is 20. mmHg?
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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PROBLEM SOLVING. Show complete solutions to the following problems in the BOXES provided and
CIRCLE final answers with units.
1- 2. A hydraulic press has pistons of area .0060m? and 0.350m? respectively. A force of 25N is
applied to the smaller piston. What is the lifting force on the bigger piston?
3 - 5. How high in m should an intravenous bag be for a liquid to just enter the vein? Assume that
the density of the fluid is equal to that of water and the blood pressure is 20. mmHg?
6 - 8. The plunger and the needle of a hypothermic syringe have areas of 0.50cm? and 0.00060cm?
respectively. To inject a vaccine, a nurse pushes the plunger with a force of 5.5N. What pressure in
Pa is transmitted to the vaccine?
9 - 11. The area of contact between an injection needle and the skin is a very tiny circle with a
diameter of 2.54x10°cm. If the needle exerts a force of 6.9×10²N, what is the pressure in Pa?
12 - 14. An aluminum ball of mass 54.0g and density of 2.70g/mL is placed in a beaker filled with
water. What is the volume of the ball? What is the volume of water that will spill out of the beaker?
What is the buoyant force of water on the ball?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fa2da9a4c-7c73-4559-8d03-7e24ab07cb16%2F28436c54-fce5-4932-b740-264dbdcd6851%2Fwxdevmh_processed.png&w=3840&q=75)
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