On Thu, 15 Sep 2005, Jed Rothwell wrote: > http://www.scienceiq.com/ShowFact.cfm?ID=212 > > http://www.sportstek.net/hotteeze.htm > > Apparently you have to admit air into the bag. It would be interesting to > see what would happen if a whole box of these things was damaged. > > I have not seen these in the U.S.
"pyrophoric" iron. If iron is ground up fine enough, it's surface area is such that the high rate corrosion heat can cause fires. They sell these in Bartell's pharmacy. Self-heating pain releif pads. If you cut open the tyvek pad, you find black powder which eventually turns into red rust. They seem to have designed the particle size to give slow heat over hours. I was going to see what happens if I try sprinkling the stuff into a bowl filled with cold oxygen, but never got around to it. (((((((((((((((((( ( ( ( ( (O) ) ) ) ) ))))))))))))))))))) William J. Beaty SCIENCE HOBBYIST website billb at amasci com http://amasci.com EE/programmer/sci-exhibits amateur science, hobby projects, sci fair Seattle, WA 206-789-0775 unusual phenomena, tesla coils, weird sci
