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science chapter 11

forces in fluids

pressure the force exerted on a surface divided by the total area over which the force is exerted
pascal a unit of pressure equal to one newton per square meter
fluid a substance that can easily flow
barometer an instrument used to measure atmospheric pressure
buoyant force the upward force exerted by a fluid on a submerged object
Archimedes principles the rule that the buoyant force on an object is equal to the weight of the fluid the object displaces
density the ratio of the mass of a substance to its volume
pascals principles the rule that when force is applied to a confined fluid, the increase in pressure is transmitted equally to all parts of the fluid
hydraulic system a system that multiplies force by transmitting pressure from a small surface area through a confined fluid to a larger surface area
Bernoulli's principle a rule that a stream of fast moving fluid exerts less pressure than the surrounding fluid
lift an upward force
Created by: 088103