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-----Original Message-----
From: phys-l-bounces@carnot.physics.buffalo.edu [mailto:phys-l-
bounces@carnot.physics.buffalo.edu] On Behalf Of John Clement
Sent: Wednesday, May 27, 2009 11:36 AM
To: 'Forum for Physics Educators'
Subject: Re: [Phys-l] paint your roof?
No, I remember my father talking about it in the early 60s? He
followed the
news including science news. So on this one you are on your own to
find the
reports. It would probably have been reported in the NY Times science
section. The NY Times science section is a good source and it probably
has
as many substantive articles as most of the monthly science magazines.
Besides which you can access it for free. But older articles may
require $$
for full access. Most NY Times articles in the 1800s and very early
1900s
are now accessible for free. It is goldmine of information, especially
if
you are a genealogist.
John M. Clement
Houston, TX
writes:
Interesting! Do you happen to know which Canadian school this is?
Forum for Physics Educators <phys-l@carnot.physics.buffalo.edu>
extent)Heating is at 20% and the white roofs would increase (to some
mostheating demand.
White roofs would probably actually decrease heating demand. The
betweendemand for heating is at night in northerly climates. A white roof
reduces
radiative losses during the long winter nights. So the balance
radiativedaytime loss in radiative heating and the nighttime gain in
lossloss in
would probably favor the long nights. Actually most of the heat
wouldnorthern climates is probably through the windows and doors, so it
thebe
a small effect at best.
Actually if you can reduce heat loss enough in a northerly climate,
househeat
gain due to appliances, lighting, and human habitation can keep the
thewarm. There is a school in Canada where they use the body heat from
theychildren to keep it warm. Rather than venting the heat during lunch
pump it to the classrooms to maintain the temperature.
John M. Clement
Houston, TX
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