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chapter10 - Chapter10 ThermalPhysics Heat

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 Chapter 10 Thermal Physics
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Heat The process by which energy is exchanged  between objects because of temperature  differences is called  heat Objects are in  thermal contact  if energy can  be exchanged between them Thermal equilibrium  exists when two objects  in thermal contact with each other cease to  exchange energy
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Zeroth Law of  Thermodynamics If objects A and B are separately in thermal  equilibrium with a third object, C, then A and B are in  thermal equilibrium with each other Object C could be the thermometer Allows a definition of temperature
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Temperature from the Zeroth  Law Temperature  is the property that  determines whether or not an object is  in thermal equilibrium with other objects Two objects in thermal equilibrium with  each other are at the  same temperature
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Thermal Physics Thermal physics is the study of  Temperature Heat How these affect matter af
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Thermometers Used to measure the temperature of an  object or a system Make use of physical properties that change  with temperature Many physical properties can be used Volume of a liquid Length of a solid Pressure of a gas held at constant volume Volume of a gas held at constant pressure Electric resistance of a conductor Color of a very hot object
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Thermometers, cont A mercury thermometer  is an example of a  common thermometer The level of the mercury  rises due to thermal  expansion Temperature can be  defined by the height of  the mercury column
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Temperature Scales Thermometers can be calibrated by  placing them in thermal contact with an 
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