science exam part 3 (state or matter and fluid forces)

Term
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a unit of pressure is called a?
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Terms in this set (30)
a unit of pressure is called a?
Pascal
air pressure decreases as?
velocity or elevation increases
what does a hydraulic system do?
multiply force
If an object floats, the volume of displaced water is equal to the volume of
of the portion of the object under water
what scientific rule states that the buoyant force on an object is equal to the fluid displaced by the object?
Archimedes
pascals principal states that when force is applied to a confined fluid, the change in pressure is transmitted
equally to all parts of the fluid
Bernoulli principle helps explain?
flight
The mass per unit volume of a substance is its
density
a substance whose shape can easily change is a
fluid
what scientific rule states that pressure exerted by a moving stream of fluid is less than the pressure of the surrounding fluid?
Bernoulli's principal
the breaking system of a car is an example of?a hydraulic systemMatter that has a definite volume but no definite shape is asolidMatter in which atoms are tightly held in place is asolidMatter with no definite volume and no definite shape is a ____.gasMatter that has a definite volume but no definite shape is aliquidMatter in which the particles are free to move in all directions until they have spread evenly throughout their container is a ____.gasMost matter ____ when heated.expandsthe theoretical point at which all molecular motion stops is called?absolute zeroCompared to most substances, water is unusual because it ____ when it goes from the liquid to solid state.expandsthe amount of energy needed to change a material from solid to liquid is called the heat of?fusionthe amount of energy needed to change a material from liquid to gas is called heat of?vaporizationAccording to ____, if you decrease the volume of a container of gas and hold the temperature constant, the pressure of the gas will increase.Boyle's lawaccording to ___________ if the volume of the gas increases with increasing temperature as long as pressure does not changeCharles's lawaccording to ________ if the velocity of the fluid increases the pressure exerted by the fluid decreasesBernoulli's principalAs a sample of matter is heated, its particlesmove more quicklythe most common state of matter in the universe isplasmathe idea that matter is made up of small particles in constant motion isthe kinetic theory of matterOne application of Pascal's principle isa hydraulic car liftt or f :hydraulic systems use two pistons with different surface areastruet or f :Bernoulli's Principle states that the buoyant force acting on a submerged object displacesfalse, Archimedes