RE: [ATM] RE: glass heating

["Gregg Swanson" <gswanson@microsoft.com>]

This was demonstrated on a recent episode of myth busters; was the water
distilled? The explanation was something related distilled water having
no impurities; the water erupted violently when salt or sure was
added...

Gregg

-----Original Message-----
From: atm-bounces@atmlist.net [mailto:atm-bounces@atmlist.net] On Behalf
Of David M. Bourgeois
Sent: Tuesday, January 25, 2005 5:54 PM
To: atm@atmlist.net
Subject: Re: [ATM] RE: glass heating

I believe that was in the usenet physics FAQ, might still be. Basically,
the
water is past boiling point, the water is still, and there is nothing to
nucleate on. Movement disturbs this equilibrium, and boiling onsets
violently....

Not sure why styrofoam cups might tend to cause this more often, unless
they
absorb very little microwave energy compared to regular cups, etc., and
then
people heat it as though it were a regular cup, which means it gets too
much
energy input....

On Tue, Jan 25, 2005 at 05:12:40PM -0600, Jerry Reddell wrote:
> 
> Apparently styro foam cups are dangerous to use for heating water etc.
I
> have not experience it but a friend's teenager was scalded when he
took a
> styrofoam cup of heated water from the microwave. Once in his hand and
> turned to walk away the water in the cup erupted violently causeing
bad
> burns on his face and hands. I have no explaination for that event,
but the
> doctor that treated him said he had seen several patients who had
similar
> accidents.
> 
> Jerry Reddell
> 
-- 
David Bourgeois  -->dbourgeo@thezone.net
http://home.thezone.net/~dbourgeo/
#  "Research is what I am doing when I don't know what I am doing." 
#  - Wernher von Braun
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