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Joined: Sep 2001
Posts: 6,296
Carpal Tunnel
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Carpal Tunnel
Joined: Sep 2001
Posts: 6,296 |
What a terrific mom you were (are), of troy! The only Newton I ever had in my childhood kitchen was that of figs.
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Joined: Jul 2000
Posts: 3,467
Carpal Tunnel
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Carpal Tunnel
Joined: Jul 2000
Posts: 3,467 |
Yes, water expands en frozen, but it also expands before it freezes, which was the point of my previous note. So far as I know it's the only molecule that acts in that peculiar fashion.
Normal logic coupled with a knowledge of physics leads you to expect that water at 2 degrees C will be more dense than water at 4. But that's not the case.
Certainly when water changes state at 0 C it expands dramatically, and that's what bursts pipes. The expansion of water in the liquid state between 4 and 0 C is very very slight, and only of serious interest to people doing complicated experiments.
TEd
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Joined: Mar 2000
Posts: 6,511
Carpal Tunnel
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Carpal Tunnel
Joined: Mar 2000
Posts: 6,511 |
I have a friend who says warm water freezes faster than cold water. I haven't tried to experiment with that yet. Do y'all think it has anything to do with the minerals in the water?
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Joined: Oct 2000
Posts: 5,400
Carpal Tunnel
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Carpal Tunnel
Joined: Oct 2000
Posts: 5,400 |
oh you should google for info--i do remember reading that someone did actually perfome a series of experiements about hot/warm/cold water and freezing time..
hot water does freeze marginal faster, --but more important it freezed clearer.
air is an insultator. (a pretty good one too) most of the 'warmth' of clothing is based on how good the clothing is at traping air around our body -while still letting moisture evaporate.
air trapped in water --and cold tap water is often 'aerated' has lots of air. hot water has less (especially water that has been heated (boiled) and let to set for 2 or more minutes (so its cools a bit, but it's still very hot)
with out all the air, the water freezes 'evenly'(and faster,(no air to insulate/retard the freezing process) and you have smaller chunks of the milky white ice in the center of cubes/block (which is white because of small bubbles of air) and the clear ice can freeze colder.. (since there isn't downward limit to how cold ice becomes.
'ice companies' use distilled water for freezing to make large clear blocks of ice for sculptures.
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Joined: Sep 2000
Posts: 2,788
Carpal Tunnel
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Carpal Tunnel
Joined: Sep 2000
Posts: 2,788 |
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Joined: Oct 2003
Posts: 389
enthusiast
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enthusiast
Joined: Oct 2003
Posts: 389 |
"...warm water freezes faster than cold water."
Does this sound right of troy?:
If the water is pure, with no minerals or gases (usually air), the cold water will freeze faster, because it’s closer to 0C already. If, by heating water that has trapped gases, some of these may be released and because it’s purer, it’s possible that a warm container of this water will freeze faster than a cooler container (of the same size) that has some trapped gases. On the other hand, if there are dissolved minerals in the water, heating will concentrate these “contaminates” and the water will freeze less fast at the same temperature and even more slowly if it’s warmer than it’s cool unheated partner.
However, there ARE alligators in the sewers of NYC.
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Joined: May 2004
Posts: 89
journeyman
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journeyman
Joined: May 2004
Posts: 89 |
Ergodic
adjective: positive recurrent aperiodic state of stochastic systems; tending in probability to a limiting form that is independent of the initial conditions.
Really now,  the word "ergodic" is a contrived mathematical term devoid of any semblance of meaningful semantical function. Except to impress the non-cognoscenti. And as such it will soon become the avant-garde by-word of today's scientific community. Shame.
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Joined: Apr 2000
Posts: 10,542
Carpal Tunnel
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Carpal Tunnel
Joined: Apr 2000
Posts: 10,542 |
owlbow, go to the straightdope link given above; it comes closer to the straight dope of the matter.
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Joined: Dec 2000
Posts: 13,803
Carpal Tunnel
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Carpal Tunnel
Joined: Dec 2000
Posts: 13,803 |
the word "ergodic" is a contrived mathematical term devoid of any semblance of meaningful semantical function.
Or:
I don't understand it, therefore it's stupid.
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Joined: May 2004
Posts: 89
journeyman
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journeyman
Joined: May 2004
Posts: 89 |
My aren't we testy this fine Thursday morn. Can't a girl have an opinion?
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