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Re: [Phys-l] paint your roof?



A good local library might have NY times on micro-film.

_________________________

Joel Rauber, Ph.D
Professor and Acting Head of Physics
Department of Physics
South Dakota State University
Brookings, SD 57007
Joel.Rauber@sdstate.edu
605.688.5428


-----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


Interesting! Do you happen to know which Canadian school this is?

Forum for Physics Educators <phys-l@carnot.physics.buffalo.edu>
writes:
Heating is at 20% and the white roofs would increase (to some
extent)
heating demand.

White roofs would probably actually decrease heating demand. The
most
demand for heating is at night in northerly climates. A white roof
reduces
radiative losses during the long winter nights. So the balance
between
daytime loss in radiative heating and the nighttime gain in
radiative
loss
would probably favor the long nights. Actually most of the heat
loss in
northern climates is probably through the windows and doors, so it
would
be
a small effect at best.

Actually if you can reduce heat loss enough in a northerly climate,
the
heat
gain due to appliances, lighting, and human habitation can keep the
house
warm. There is a school in Canada where they use the body heat from
the
children to keep it warm. Rather than venting the heat during lunch
they
pump it to the classrooms to maintain the temperature.

John M. Clement
Houston, TX

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