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21 Cards in this Set
- Front
- Back
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R-value
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a measurement of the insulating ability of a substance
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kilocalorie (kcal)
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the energy stored in foods
if 1 kg of water is heat 1 degree celcius, a kilocalorie is required |
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caloric theory
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a theory that defined thermal energy as a substance that flowed from hot bodies into cold bodies
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thermal equilibrium
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when two objects in contact are the same temperature and conduction stops
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convection
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the flow of thermal energy fro one place to another by the movement of particles
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convection current
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a mass of moving particles that carries thermal energy
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thermal expansion
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an increase in the volume of a substance caused by the addition of thermal energy
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thermodynamics
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the branch of physics that deals with thermal energy
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kinetic theory of thermal energy
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identifies the thermal energy of an object with the motion of its particles
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calorie (cal)
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the amount of thermal energy required to increase the temperataure of 1 g of water 1 degree C
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entropy
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the amount of disorder and randomness in a system; unusable energy
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insulators
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a substance that does not conduct electricity or heat very well
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convection
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the flow of thermal energy from one place to another by the movement of particles
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heat
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the kinetic energy present within the particles of matter; the transfer of thermal energy
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conduction
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the flow of thermal energy from an object to another object through contace
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heat of fusion
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the amount of thermal energy needed to change a substance from its solid phase to its liquid phase
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radiation
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the transportation of thermal energy without the use of matter
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temperature
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the measure of the average kinetic energy in a material
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heat of vaporization
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the amount of thermal energy needed to change a substance from its liquid phase to its gaseous phase
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specific heat
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the amount of thermal energy needed to raise the temperature of 1 g of a substance 10 C
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conductor
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any substance that will allow the flow of thermal energy; in electricity, a substance that holds its valence electrons loosely, allowing the flow of electricity
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