# Shared Flashcard Set

## Details

ch 7 PS HRW
ch 7 PS HRW
11
Physics
01/07/2009

Term
 Archimedes' principle
Definition
 the principle that state 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
Term
 atmospheric pressure
Definition
 the pressure caused by the weight of the atmosphere
Term
 Bernoulli's principle
Definition
 the principle that states that the pressure in a fluid decreases as the fluid's velocity increases
Term
 buoyant force
Definition
 the upward force that keeps an object immersed in or floating on a liquid
Term
 drag
Definition
 the force parallel to the velocity of the flow; it opposes the direction of an aircraft and, in combination with thrust, determines the speed of the aircraft
Term
 fluid
Definition
 a nonsolid state of matter in which the atoms or molecules are free to move past each other, as in a gas or liquid
Term
 lift
Definition
 an upward force on an object that moves in a fluid
Term
 Pascal
Definition
 the SI unit of pressure
Term
 Pascal's principle
Definition
 the principle that states that a fluid in equilibrium contained in a vessel exerts a pressure of equal intensity in all directions
Term
 pressure
Definition
 the amount of force exerted per unit area of a surface
Term
 thrust
Definition
 the pushing or pulling force exerted by the engine of an aircraft or rocket
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