[TheForge] glass doors & glass shaping

[Marc Godbout]

Not if you fill it all the way. 

Anyway, water behaves just like every other material, *except* at
freezing. Going from liquid to solid causes it to expand because of the
crystalline structure of ice, and not because of thermal expansion. Once
it turns to ice, it'll start behaving like any other solid and contract
as it gets cold.

And it's a good thing it does that, too. Otherwise, ice would sink,
causing the bottoms of lakes, rivers, and oceans to possibly stay frozen
year-round. WHo knows what that would have done to our climate?

--Marc


On Tue, 2006-06-13 at 16:38 -0500, craig.schaefer at verizon.net wrote:
> I bet you're seeing the results of the airgap at the top of the jug shrinking.
> In any case, water does begin to expand at 3.9 degrees C.  or thereabouts.
> 
>  Fill a 
> >milk jug with hot water, cap it and throw it in the refrigerator, and 
> >you will see it contract....

-- 
Marc Godbout
http://www.ironringforge.com

New England Blacksmiths Membership Director
http://www.newenglandblacksmiths.org