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Chap. 6 EM
Term | Definition |
---|---|
temperature | measure of the average kinetic energy of all particles in an object |
thermal energy | sum of the kinetic and potential energy of the particles in an object; is transferred by conduction, convention, and radiation |
heat | thermal energy that flows from warmer material to a cooler material |
specific heat | amount of thermal energy needed to rais the temperature of 1 kg of ameterial 1 C |
conduction | transfer of thermal energy by collisions between paricles in matter at a higher temperature and particles in matter at a lower temperature |
convention | transfer of thermal energy in a fluid by the movement of warmer and cooler fluid from one place to another |
radiation | transfer of thermal energy by electomagnetic waves |
insulator | material in which heat flows slowly |
solar collector | device used inn an active solar heating system that absorbs radiant energy from the Sun |
thermodynamics | study of the relationship between thermal energy, heat, and work |
first law of thermodynamics | states that the increase in thermal energy of a system equals the work done on the system plus the heat added to the system |
second law of thermodynamics | states that is impossible for heat to flow from a cool object to a warmer object unless work is done |
heat engine | device that converts thermal energy into work |
internal combustion engine | heat engine that burns fuel inside the engine in chambers or cylinders |