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14 Cards in this Set
- Front
- Back
What is temperature?
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The measure of the average kinetic energy of the particles in a sample of matter.
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Thermal Energy
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the total energy of the particles in a material (including potential and kinetic)
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Heat
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the thermal (or internal) energy that flows from something with a higher temperature to something with a lower temp
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Conduction
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the transfer of energy through matter by direct contact of particles
-occurs in solids, liquids, and gases, but easiest in solids |
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Convection
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transfer of energy by the bulk movement of matter (only occurs in fluids: gases & liquids)
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Fluid
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any material that flows
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Radiation
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the transfer of energy in the form of electromagnetic waves (energy travels this way often called radiant energy)
-doesn't require matter so works in vacuum of space -occurs in solids, liquids, or gases -can be reflected, absorbed, and transmitted |
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Insulators
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do not allow heat to move easily through them (e.g. wood, plastic, glass, fiberglass)
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R-value
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indicates an objects resistance to heat flow (higher ones are better insulators)
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Kinetic Theory
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all matter is made up of particles that are in constant motion and that rate of motion depends on the temperature
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Thermal Energy vs. Temp
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thermal energy varies with the mass of the object but temp doesn't
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Thermal Energy vs. heat
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an object contains thermal energy but doesn't contain heat
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good conductors
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metals
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poor conductors
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gases, air
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