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General Science / Re: Does cold exists?
« on: 12/04/2013 15:25:00 »
Cold is the absence of heat. You get usable energy from temperature differentials. I don't know of cold as a source of energy - remember one definition of temperature is directly related to the average kinetic energy of the constituent particles; I don't see how a system with average lower kinetic energy could be seen as possessing more energy than a similar one with higher kinetic energy