Heat energy can flow by conduction, convection or radiation. It always flows from a region of high temperature to a region of low temperature i.e. from hot to cold. Conduction is the flow of heat ...

This article was originally published with the title “ The Conduction of Heat in Solids ” in Scientific American Magazine Vol. 207 No. 6 (December 1962), p. 92 doi:10.1038 ...