here's a piece oiron. good conductor? yeah here's a piece of wood. good conductor? no. no. it turns out wood is a very, very poor conductor as wve talked about. i'm gonna put a piece of paper around this iron. i'm gonna light up my torch again. paper doesn't ght on fire, gang. but if the paper is taken out like this, and it's flamin'. put it against the iron, it goes out. it's charred. that part lit up. oops. call the fire marshal. but what's going on here, gang? well, let's try it with wood. let's try it with wood. our test. be checkin' the neighbor and see if the neighbor knows why that paper didn't light. did yoever read the book by ray bradbury called fahrenheit 4? yes. that 451 is what? that's the temperature in fahrenheit degrees at which paper burns. that was about a book-burning book, yeah? watch this, gang. fire city. that thing is burning up. look at that all right. okay. why with the wood but not with the metal? neighbor time, neighbor time. okay. what would be the answer, gang? heat transfer is-- most of the energy here went to what, the paper or the metal? meta