New here. If this isn't the right forum for the question excuse me. I saw a science demonstration of converting heat to mechanical energy. it was a circular rim supported on an axle by rubber band spokes, kind of like a bicycle wheel but with rubber bands instead of metal spokes. kind a a science fair demonstration sort of thing. So you shine a heat lamp on one side of it and the bands shrink from the heat throwing it off balance and it spins. supose you glued magnets around the rim with all like poles facing out and place another magnet near the rim so it repells the wheel off axis. Why wouldnt that work? how would that be different from the heat transfer?