Energy transfer mechanisms Thermal conduction(or conduction) Energy transferred by direct contact E.g. energy enters the water through ne bottom of the pan by thermal conduction Important: home insulation, etc Rate of energy transfer through a slab of area a and thickness AX, with opposite faces at different temperatures, Tc and Tr fo=Q/At=kA(Th-TC)/4X Energy k: thermal conductivity flo Physics 121: Lecture 25, Pg 7Physics 121: Lecture 25, Pg 7 Energy transfer mechanisms Thermal conduction (or conduction): Energy transferred by direct contact. E.g.: energy enters the water through the bottom of the pan by thermal conduction. Important: home insulation, etc. Rate of energy transfer through a slab of area A and thickness x, with opposite faces at different temperatures, Tc and Th k : thermal conductivity x Th Tc A Energy flow  =Q/t = k A (Th - Tc ) / x