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Re: [RC] [RC] Frozen Tanks (Mpemba effect) - Sky RanchOk, regarding hot water freezing faster than cold. I think it's the alignment of the water molecules. To freeze, to become ice, liquid water organizes into crystals. Hot (really hot) water is less dense than cold water - there's more space between the H2O molecules... therefore easier to form into crystals. Anyway, that's my theory and I'm sticking to it. Oh - and for the earlier post where the writer said if she added warm or hot water to the buckets she didn't have ice in the morning ... well that wouldn't work here. I could put buckets of boiling water outside and have solid ice on some nights, like tonight. When I lived in Gunnison, Colorado, I could put out a gallon jug of water and it would freeze solid within 30 minutes, on a -20 degree night with wind. In northern Ontario I visited friends and was witness to BEER freezing in the CAN before I could drink it, on a cold night - it was 40 degrees below 0, we each opened a can of beer, took a sip, and before we could take another sip, the beer turned to slush. True story. It was in Kapuskasing, Ontario - a very cold place in winter. I was visiting from Texas - I was terrified! Carla Richardson Colorado ----- Original Message ----- From: "Diane Trefethen" <tref@xxxxxxxxxxxxxxxxxx> To: "ridecamp" <ridecamp@xxxxxxxxxxxxx> Sent: Wednesday, December 14, 2005 5:32 PM Subject: Re: [RC] [RC] Frozen Tanks (Mpemba effect) Carolyn Burgess wrote:Wikipedia. Didn't anyone see the article in the last few days where an employee posting erroneous information in Wikipedia about his boss. This is not a scientific publication.Though cold water may usually freeze faster than warmer water, that hot water CAN freeze faster than cooler water is an established fact. What's not so established is, "Why?" The link I posted earlier was to an article published by the University of California, Department of Physics, written in Nov, 1998. You can Google literally hundreds of universities, research institutes and scientific journals that have published on this subject. Here are just three: University of Alaska, Fairbanks, March 5, 1984 http://www.gi.alaska.edu/ScienceForum/ASF6/650.html Georgia State University, Department of Physics and Astronomy http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/freezhot.html And the granddaddy of science for many of us, Scientific American, October 21, 1998 http://www.sciam.com/askexpert_question.cfm?articleID=0008EB6B-6C7E-1C71-9EB 7809EC588F2D7 =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Ridecamp is a service of Endurance Net, http://www.endurance.net. Information, Policy, Disclaimer: http://www.endurance.net/Ridecamp Subscribe/Unsubscribe http://www.endurance.net/ridecamp/logon.asp Ride Long and Ride Safe!! =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Ridecamp is a service of Endurance Net, http://www.endurance.net. Information, Policy, Disclaimer: http://www.endurance.net/Ridecamp Subscribe/Unsubscribe http://www.endurance.net/ridecamp/logon.asp Ride Long and Ride Safe!! =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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