In response to the question "Why does the OBC gong at 37 degrees F?"
Date: 18 Jun 1997 15:57:21 -0400
From: "David L. Pillars, Jr." <dlpjr_at_ix.netcom.com>
" Atmospheric pressure also affects the changes in water's physical
state. At the sea-level pressure of one standard atmosphere (760
millimeters of mercury), pure water freezes into ice at 32 F (0 C) and
boils into steam at 212 F (100 C). Above sea level, where pressure is
reduced, water boils at lower temperatures and freezes at higher
Excerpted from Compton's Interactive Encyclopedia
Copyright (c) 1994, 1995 Compton's NewMedia, Inc. All Rights Reserved
"Important: The temperature warning device does nothing to alter the fact
that surface ice can still form at temperatures above 37.5 F, especially on
bridges and shade covered road surfaces."
Excerpted from BMW 3 Series owner's Manual (Page 59)
Furthermore, I have consulted with the Physics dept at Grand Valley State
University here in West Michigan. After being bounced around the
department, I was told that 32 degrees is the freezing point of PURE water
at SEA LEVEL. The freezing point of water can vary from 28 degrees (sea
water) to as high as 37 degrees. This explains icing of airplane wings in
above freezing temps. It also explains why salt is added to roads and ice
cream makers, and why the ocean doesn't freeze solid in the arctic as the
salt lowers the freezing point of the ice. This is how antifreeze and
coolant works in your car. It keeps your radiator from freezing and it
keeps the coolant a liquid at high temperatures. If you change the density
of water you change its freezing and boiling point.
Also Bridges and over passes are deprived of the natural heat that radiates
from the ground, as there isn't any earth beneath them. Last time I checked
that was the definition of a bridge, anyway.
96 Alaska Blue Sport
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