There's also the simple effect of weight. A heavy blanket on top of a light one may compress it and reduce it's thermal resistance. Brent On 12/5/2019 11:42 AM, Tomas Rokicki wrote:
But the knit blanket goes under the quilt.
On Thu, Dec 5, 2019 at 11:40 AM Cris Moore via math-fun < math-fun@mailman.xmission.com> wrote:
I agree - it holds when there is a smooth temperature gradient whose slope depends only on the material. I think this holds fairly well for blankets made of rubber, aluminum, or concrete.
- Cris
On Dec 5, 2019, at 12:31 PM, Tomas Rokicki <rokicki@gmail.com> wrote:
That may be true for conduction and probably radiation but not convection. On Thu, Dec 5, 2019 at 11:29 AM Cris Moore via math-fun < math-fun@mailman.xmission.com> wrote:
I think they do in the sense that if you have two or more blankets of different thicknesses and materials, and you run the heat equation with boundary conditions that impose two different temperatures on either side, then the flow of heat between them is the same regardless of which order they’re stacked. To put it differently, combining resistors in series is commutative.
- Cris
On Dec 5, 2019, at 8:19 AM, James Propp <jamespropp@gmail.com> wrote:
Do blankets commute?
Not esthetically (of course), but thermally?
Jim Propp _______________________________________________ math-fun mailing list math-fun@mailman.xmission.com https://mailman.xmission.com/cgi-bin/mailman/listinfo/math-fun Cristopher Moore Professor, Santa Fe Institute
I confess to an uneasy Physiocratic suspicion, perhaps unbecoming in an academic, that we are throwing more and more of our resources, including the cream of our youth, into financial activities remote from the production of goods and services, into activities that generate high private rewards disproportionate to their social productivity. — James Tobin, 1984
_______________________________________________ math-fun mailing list math-fun@mailman.xmission.com https://mailman.xmission.com/cgi-bin/mailman/listinfo/math-fun
-- -- http://cube20.org/ -- http://golly.sf.net/ -- _______________________________________________ math-fun mailing list math-fun@mailman.xmission.com https://mailman.xmission.com/cgi-bin/mailman/listinfo/math-fun
_______________________________________________ math-fun mailing list math-fun@mailman.xmission.com https://mailman.xmission.com/cgi-bin/mailman/listinfo/math-fun