Conduction Heat Transfer
The holding is in a mode of heat transfer from one part of the material to another part of the same material, or from one material to another in physical contact with him, without significant movement of molecules of the substance. For example, heat transfer in food products subject to cooling in the environment due to the heat.
In solid objects, conduction of heat in part due to the influence of neighboring molecules vibrating means about their positions and partially at the expense of internal exposure. When a solid object-metal, there are also a large number of moving electrons, which can easily penetrate matter, passing from one atom to another, and they contribute to the redistribution of energy in the metal object. In fact, the contribution of mobile electrons prevails in metals, which explains the relationship between heat and electric conductivity of these materials...
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Air-Conditioning