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8th Chap 11 & 13

Forces in Fluids and Energy

QuestionAnswer
hydraulic systems multiply force
fluid a material that can easily flow
pressure force divided by area
buoyant force acts in an upward direction
Archimedes' principle the buoyant force on an object is equal to the weight of the fluid displaced by the object
SI unit of pressure pascal, Pa, and N/m2
Pascal's principle states that when force is applied to a confined fluid, the change in pressure is transmitted equally to all parts of the fluid
Bernoulli's principle states that the pressure exerted by a moving stream of fluid is less that the pressure of the surrounding fluid
water pressure increases as depth increases
balanced pressure air pressure exerted equally on an object from different directions
fluid exerts pressure because they are made up of tiny moving molecules that exert forces
air pressure decreases as elevation increases
a ship stays afloat as long as the buoyant force is equal to the ship's weight
gravitational potential energy potential energy that depends on height
an energy transformation a change from one form of energy into another
joules the unit energy is measured in
law of conservation of energy states that when one form of energy is converted into another, no energy is destroyed in the process
mechanical energy calculated by adding its kinetic and potential energies
potential energy stored energy
thermal energy the total potential and kinetic energy of the particles in an object
pascal unit of pressure
kinetic energy energy associated with motion
energy the ability to do work
Created by: Mrs. Gordon
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