If the melting point of water didn't go down with pressure, ice skates wouldn't work. The reason ice is so slippery is that a film of water forms when you stand on it. Think about it: what other solid substance is as slippery as ice?
It's a common phenomenon for carbonated beverages to freeze when you open them. As any high school kid who hid a case of beer in the trunk of his car.
As stated before, water is about the only substance that expands when it freezes. That accounts for a number of odd characteristics in addition to the two I just mentioned. For example, the oceans would freeze from the bottom up if water contracted as it froze.
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Today's Featured Article - A 1937 John Deere Unstuck - by Gary Hickman. Here is my story of how I got the pistons out of a 1937 JD B that the engine had been stuck for about 14 years: About 12 years ago my Dad gave me one of the tractors I ran as I was growing up on our farm in central Nebraska. The engine on this tractor, a 1937 John Deere "B", had been stuck for 2 years before he gave it to me. This last spring (1999) I hauled the tractor to our 2 acre lot in St. Libory Nebraska where it joined my antique machinery collection, at that time a 1929 Caterpillar T
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