X1011609196-00368-86814</DOCNO> Heat exchange mechanisms Slide 3 of 30 Heat exchange mechanisms Conduction - molecules/atoms in one substance directly exchange (through collisions) kinetic energy with molecules/atoms in second substance Convection - heat transfer a three step process of conduction, advection, and conduction Conduction warms part of an object The warmed part moves (advects) to a cooler location Heat conducts from the transported warm part to its cooler surroundings Radiation - objects loose or gain energy by emitting or absorbing electromagnetic radiation Objects at any temperature above 0 K emit EM radiation Energy content of EM radiation proportional to frequency and inversely proportional to wavelength Emitting and absorbing objects behave like black-bodies -->
(conduction Conduction; warms; part of an object)
conduction Conduction
warms
part of an object