windshield fluid sprayer

[Richard Hoffman]

I'll second this...  what happens is that the cold water freezes
first....but the hot water loses energy (heat) much faster than the cold.

Richard
1990 CQ 195K
----- Original Message -----
From: "Robert Myers" <robert at s-cars.org>
To: "Phil Payne" <quattro at isham-research.com>; <duane at zk3.dec.com>; "Quattro
List" <quattro at audifans.com>
Sent: Thursday, November 29, 2001 1:17 PM
Subject: Re: windshield fluid sprayer


> --
> Bullpucky, Phil.  Absolute nonsense.  The colder sample freezes
> first.  There is simply no way around thermodynamics.  The hot sample must
> first lose heat to reach the starting temperature of the colder
> sample.  This takes time during which the colder sample has reached a
lower
> temperature and/or has started already to freeze.
>
>
> At 02:50 PM 11/29/01, Phil Payne wrote:
>
> > > Once, while skiing, an ex-engineer demonstrated an interesting
> > > phenomena around boiling water and cold temperatures.
> > >
> > > At -40 degrees (figure it out, C or F), take a bucket full of
> > > almost boiling water, and fling the water in the air.
> > >
> > > Guess what happens? (hint: not what you think)
> >
> >The hot freezes first because excess pressure inside a droplet is T/r,
> >where T is the surface tension and r is the radius.  Two
> >effects - surface tension is lower at high temperatures and there is
> >energy available as heat, so much smaller droplets can form.
> >
> >Mass per unit surface area is less, so freezing is faster.
> >
> >--
> >   Phil Payne
> >   http://www.isham-research.com/quattro
> >   +44 7785 302 803
> >   +49 173 6242039
> >
> >
> >
> >
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>
> Bob
> *****
>   Robert L. Myers   304-574-2372
>   Rt. 4, Box 57,  Fayetteville, WV 25840 USA   WV tag Q SHIP
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> --
>
>