Heat transfer by convection and want to change the temperature in some form of substance, but in the radiation heat does not need to rely on substances in radiation. Radiation refers to radiation of heat energy is exported by the object. All kinds of objects with a temperature above zero degrees complete radiation heat. Consider one piece of solid starts at a higher temperature, Ts, which is the environment of a vacuum by Tsur around because of the strong environmental factor from the wall by a vacuum so there is no heat transfer by solid and treating her but found that it would be cool.Walong and finally to susom balance with the environment around it by this evening, will involve the reduction of internal energy stored by the solid, and as a result of direct radiation of heat from the surface of the skin at the same time, they will receive or attract the radiation from the environment if Ts > Tsur, the net rate of heat transfer by radiation qr will leave dan surface, and the surface will cool until Ts into Tsur.
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