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Jones chapter 7

TermDefinition
1 fluid- a non solid state of matter in which the atoms or molecules are free to move past each other, as in a gas or liquid
2 pressure- the amount of force exerted per unit area of a surface
3 pascal- the SI unit of pressure (symbol, Pa)
4 atmospheric pressure- the pressure caused by weight of the atmosphere
5 buoyant force- the upward force that keeps an object immersed in or floating on a liquid
6 Archimedes' principle- the principle that states that the buoyant force on an object in a fluid is an upward force equal to the weight of the volume of fluid that the object displaces
7 bernoulli's principle- the principle that states that the pressure in a fluid decreases as the fluid's velocity increases
8 lift- an upward force on an object that moves in a fluid
9 thrust- the pushing or pulling force exerted by the engine of an aircraft or rocket
10 drag- a force parallel to the velocity of the flow; it opposes the direction of an aircraft and, in combination with thrust, determined the speed of the aircraft
11 Pascal's principle- the principle that state that a fluid in equilibrium contained in a vessel exerts a pressure of equal intensity in all directions