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Jones chapter 7
Term | Definition |
---|---|
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 |