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Heat Ch 6
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substance’s VOLUME increases when TEMPERATURE increases
Thermal expansion substance’s VOLUME increases when TEMPERATURE increases
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Heat Transfer of energy between objects that are at different temperatures From the higher temperature object to the lower temperature object
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Thermal Equilibrium
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Conduction transfer of thermal energy by direct contact – touch!
Kinetic energy is transferred as particles collide Solids, particularly metals, are good heat conductors
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Convection the transfer of energy by the motion of heated particles in a liquid or gas Convection currents transfer heat from warmer to cooler parts of a fluid.
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Radiation energy transfer by electromagnetic waves
Some radiation is absorbed and some is reflected when it strikes a material
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Thermal Conductivity Rate at which a substance transfers thermal energy
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Specific Heat Capacity
amount of heat needed to raise the temperature of 1 kg of a material by 1 degree Celsius or Kelvin can be thought of as how well a substance resists changing its temperature Water = 4,184 J/(kg K) Iron = 450 J/(kg K)
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