Fourier's Law
The law of heat conduction, also known as Fourier's law, states that the time rate of heat transfer through a material is proportional to the negative gradient in the temperature and to the area, at right angles to that gradient, through which the heat is flowing. We can state this law in two equivalent forms: the integral form, in which we look at the amount of energy flowing into or out of a body as a whole, and the differential form, in which we look at the flow rates or fluxes of energy locally.
Newton's law of cooling is a discrete analog of Fourier's law, while Ohm's law is the electrical analogue of Fourier's law.
Read more about this topic: Heat Conduction
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“According to the law of nature it is only fair that no one should become richer through damages and injuries suffered by another.”
—Marcus Tullius Cicero (106–43 B.C.)