>Beaty Sez:
...
> "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 even
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 th
Speaking of pocket warmers, I once made something similar accidentally.
While I was siting in front of the computer, an AA battery and coins in my
trouser pocket arranged themselves into an electric circuit with sensible
ohmic resistance. ;-)
Harry
OrionWorks wrote:
Jed sez:
...
I mean hand warmers. "Disposable chemical pocket warmers." Little plastic
bags full of chemicals, mostly iron filings, I think. You smoosh or bend
the bag to mix the chemicals, and it gets hot for several hours. I guess it
puts out a couple of watts. I
> Jed sez:
...
> I mean hand warmers. "Disposable chemical pocket warmers." Little plastic
> bags full of chemicals, mostly iron filings, I think. You smoosh or bend
> the bag to mix the chemicals, and it gets hot for several hours. I guess it
> puts out a couple of watts. I am trying to think
OrionWorks wrote:
> > Ah, yes. A pocket warmer, like the kind people use at
> > a football game. They sell chemical heaters like that
> > in Japan.
>
> They sell them here in the U.S. as well. They are quite effective.
Oops! I misunderstood you.
You mean chemical heaters for a room I presume,
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