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RE: Gas tank pressure on MG TD

To: Len Bugel <bugel@beatrice.fnal.gov>
Subject: RE: Gas tank pressure on MG TD
From: "W. R. Gibbons" <gibbons@northpole.med.uvm.edu>
Date: Tue, 13 Feb 1996 12:42:19 -0500 (EST)
On Tue, 13 Feb 1996, Len Bugel wrote:

> this is really _fun_!) put a small amount of water in an empty aluminum 
> beverage can, and boil the water for a while on your kitchen range. The 
> water vapor will essentially drive all the air out of the can, leaving 
> only water vapor in there. Now (Here's the fun part) pick up the can with 
> some sort of tongs or a hot pot holder and quickly invert it into a pan 
> of cold water, so that the open top is submerged. The water vapor will 
> quickly condense back to a liquid, leaving a pretty good vacuum inside 
> the can - but not for long! The outside air pressure almost instantly 
> crushes the can. Try it, you'll like it! Use about half an inch of water 

Len

Not that I am a doubting Thomas, but I would think the falling pressure 
in the can would simply draw water from the sink into the can.  I would 
have been willing to bet money that not much would happen.  Have you 
actually tried this?

Ray

   Ray Gibbons  Dept. of Molecular Physiology & Biophysics
                Univ. of Vermont College of Medicine, Burlington, VT
                gibbons@northpole.med.uvm.edu  (802) 656-8910


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