Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10 5/3/83; site houxz.UUCP
Path: utzoo!linus!decvax!harpo!eagle!mhuxl!houxm!houxz!halle1
From: halle1@houxz.UUCP (J.HALLE)
Newsgroups: net.physics,net.followup
Subject: Re: More on Cold Bottles of Coke
Message-ID: <631@houxz.UUCP>
Date: Wed, 4-Jan-84 11:41:02 EST
Article-I.D.: houxz.631
Posted: Wed Jan  4 11:41:02 1984
Date-Received: Thu, 5-Jan-84 01:05:23 EST
References: <134@cubsvax.UUCP>
Organization: Bell Labs, Holmdel NJ
Lines: 12

The comment about the skater is wrong on two counts.  First, the
pressure exerted is much greater than given.  Skates are hollow ground,
making the edge much less than 1/16".  That explains what is meant by "inside
edge", eg.  Why else does sharpening the skates work so well?  Friction
cannot be the process, since that would melt the ice you're leaving,
not the stuff you're on.

Second, the ice is very close to the freezing point.  The water underneath
is above the freezing point, so the ice cannot be much colder.  The heat loss
comes from the water, not the ice.  (ultimately, of course, not directly)
Even if the ice is not over water, in most instances it will still be very
close to the freezing point.