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Chapter 16 Study Guide Review
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Gravity
Terms in this set (28)
the ability of a fluid - a liquid or a gas- to exert an upward force on an object immersed in the fluid
buoyancy
What happens when the buoyant force is greater than the weight of the object?
it floats
mass/unit volume of a material
density
In order forn object to float in water, it must be ____ dense than the water it's submerged in
less
The equation for calculating pressure
Pressure = Force/Area ; P=F/A
___ machines operate using Pascal's Principle
Hydraulic
True or False: Fluids can be liquids or gases.
True
the resistance to flow by a liquid
viscosity
True or False: If particles in a fluid are easily moved, the fluid will have a high viscosity.
False
Whose Principle explains why ships float?
Archimedes'
Whose Principle explains how hydraulics work?
Pascal's
Whose Principle explains how airplanes fly?
Bernoulli's
Whose Principle explains why toothpaste can be squeezed out of a tube?
Pascal's
Whose Principle explains why a tornado can lift the roof off a house?
Bernoulli's
the buoyancy force on an object on a fluid is equal to the weight of the fluid displaced by the object
Archimedes's Principle
pressure applied through a fluid is transmitted uncharged throughout that fluid
Pascal's Principle
the volume of a gas increases w/ increasing temperatures as long as pressure doesn't change
Charles' Law
the idea that matter is made up of small particles that are in constant motion
The Kinetic Theory of Matter
as the velocity of the fluid increases, the pressure exerted by the fluid decreases
Bernoulli's Principle
if you decrease the volume of container of gas and hold the temperature constant, the pressure of the gas will increase
Boyle's Law
the force exerted per unit area ; SI units is Pascal
pressure
the temperature where all molecular motion stops
absolute zero
-273.15'C
water's freezing point (on the Kelvin scale)
273K
water's boiling point (on the Kelvin scale)
373K
water's freezing & boiling points (on the Celsius scale)
0'C & 100'C
if the temperature remains constant, what will happen to the pressure of a gas if you decrease the volume of the container that holds it?
it increases
if the volume of a container of a gas remains constant, what will happen to the pressure of a gas if you increase temperature?
pressure will increase with the temperature
Bonus: Using Bernoulli's principle explains how an airplane wing works.
the wind over the upper surface of the wing travels faster & creates a low pressure column of air, which makes the plane lift
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