Re: Density of water.

[Bernard Cleyet <anngeorg@PACBELL.NET>]

I don't understand  -- the question, I thought was whether ice floated on 100 C
water --  It always floats.
This question arose, because some one miss read the ordinate of Hewitt's graph.
(specific volume instead of specific mass)

Your point, I suspect, is in every HS/ middle school science text.

bc

P.s. It depends on what you mean by "makes life possible."   I think during much
of earth's history it was much warmer, besides a third of the earth now never
freezes.

Jim Green wrote:

> At 23:51 01 12 2001 , you wrote:
> > Right, Hewitt plots (ordinate) the volumne of one gram of water instead of the
> > inverse.  No matter, he's plotting water not ice.  Ice (normal near zero C
> > [ice I]) 917 kg / m^3 or sg ~ .92  Water @ 100 C is 1.04 mL / g or sg 0.96 So
> > ice floats as per your experience (and mine).
>
> Bernard, you seem  to be missing the essential point -- the fact
> that  makes life possible!  Water at freezing is less dense than water at
> 4C therefore water freezes on the _surface_ of the body of water.
>
> Jim Green
> mailto:JMGreen@sisna.com
> http://users.sisna.com/jmgreen