From: Michael M. Butler (butler@comp-lib.org)
Date: Sun Dec 05 1999 - 03:36:20 MST
Yes. You're right, in the technical context, regarding the temperature of
space as a medium that exchanges heat via conduction/convection (and yes,
there's not much convection absent a strong gravity gradient, but work with
me for a minute and grant that, e.g., the 50-ton total mass of Luna's
atmosphere probably could be said to convect and could also be regarded as
a pretty creditable "spacelike" medium... but I digress).
And so, I take the question "what is the temperature of space?" in two ways.
The first is, as you say, whatever temperature _space_ is doesn't much
matter, whatever the average speed of a particle, there are so few that the
actual temperature of the medium as such doesn't matter because the _rate_
at at which any (quasi) convective transfer could occur is so low.
The second is to do exactly what I've done (as have others): take the
question to mean (or rather, take the questioner to want to know) "What
will _my_ (skin? boundary layer? something like that) equilibrium
temperature be, from a practical, embodied perspective, and please be
polite about it, won't you--will I be far from comfortable?"
In that nontechnical, folk sense:
First: the Spockian reply--"It doesn't matter"--causes some friction or
torsion in the questioner, who still wants to know "would I die or what?"
So that's not a satisfying answer in the folk context.
Second: "The impolite answer is "oh, it cycles around the freezing point of
water at 1 AU." or somesuch.
Third: The polite answer is "Well, your shadow side freezes, and your sun
side bakes, but at well below the temperature of molten lead (ca. 200
C).--in a can with some air conditioning, you could probably stay
comfortable. At least, in this neighborhood."
Note that I did say "What is Your Temperature?" earlier in the DUMB JOKE
thread. So I'd already made this sloppy rfolk meaning assignment.
I support what you've said, just wanted to share my sloppy terminology
exegesis...
MMB
At 21:39 1999/12/04 -0800, you wrote:
> > Michael M. Butler butler@comp-lib.org wrote:
> > > "What is your temperature?" "Um, 3 degrees K, or three hundred degres F,
> > > depending on how you look at it."
> > Technotranscendence wrote:
> > Wrong conversion! Michael probably means -370 degrees C (or -457 degrees
> > F)... Had to nitpick!:)?
>
>The way I interpreted that is: in a near vacuum, it doesnt matter much
>what the temperature is. The heat transfer from or to the few particles
>present is very low compared to the heat transfer by radiation. If one
>were in deep space with a pressure of 1 picotorr, the temperature
>could be anything you wanted, but you wouldnt know the difference.
>You would still radiate heat away. Doug Jones explained it in his
>post.
>
>To get a feel for what I am saying, take a grinder and grind some
>steel. One can put ones bare hand in the shower of sparks and yet
>feel no discomfort, even tho the sparks are hotter'n hell. Its because
>there is so little mass there to conduct heat into ones skin. spike
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