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- Newsgroups: sci.misc
- Path: sparky!uunet!gumby!wupost!ukma!news
- From: msunde01@mik.uky.edu (Mark Underwood)
- Subject: Re: Human bodies explode in vacuum?
- References: <iouiTB1w165w@iowegia.uucp>
- Nntp-Posting-Host: nx14.mik.uky.edu
- Message-ID: <1992Nov6.192348.20115@ms.uky.edu>
- Reply-To: msunde01@mik.uky.edu
- Organization: University Of Kentucky, Dept. of Math Sciences
- Sender: news@ms.uky.edu (USENET News System)
- Date: Fri, 6 Nov 1992 19:23:48 GMT
- Lines: 48
-
- In article <iouiTB1w165w@iowegia.uucp> quest@iowegia.uucp (Steve J. Quest)
- writes:
- > From my earlier experiments with such an apparatus, I knew
- > that a glass of water can be made to boil- as room temperature is
- > warm enough to boil water at very low pressures. The results with
- > the mice were striking- they puffed up like they were made
- > instantly obese. The eyes bulged out unnaturally, and they were
- > dead almost instantly. Returning pressure returned them to their
- > normal size. This has proven to be the most humane method for
- > mice, as we can kill almost 100 at once. I have not seen anything
- > such as ruptured or torn flesh- in fact they stay better intact
- > than they did swimming in the liquid nitrogen (sometimes they
- > would crack like glass). This is not to say that if I were to
- > pump down the tank even more (using a mercury pump instead of the
- > mechanical reed valve pump I am now using) that they would not
- > explode, but under the very low pressures I was able to subject
- > them to, they did not explode, tear, or rupture.........sq
-
-
- It would seem then, that if we subjected a human to a similar situation
- which would actually be a combination of the two (extremely low,
- approaching zero pressure and near 3K temperatures, and at any rate, far
- below that of liquid nitrogen, both of which occur in space), the person
- would probably die instantly, regardless of whether or not he would
- explode. If the sudden and rather violent (I would guess) volume changes
- of the gases in his body didn't kill him, then the temperature probably
- would. Unless (and I think this is unlikely) there was enough thermal
- radiation from the sun or his own ship or somewhere to make the _local_
- temperature MUCH higher than "space normal" Indeed, a naked person would
- die in a matter of seconds from hypothermia when exposed to temperatures
- as low as -50 degrees C (unless treated IMMEDIATELY, and even so would
- suffer from EXTREME frostbite). It is quite obvious from your work with
- the mice that the *body* would not "explode" or turn to jelly unless the
- expanding forces resulting from the pressure differential (evidenced by
- the fatness of the mice) exceeded the elasticity of the skin and/or the
- tensile strength of the muscles and other internal connective tissues. At
- any rate, if the pressure drop didn't kill him, he would die a rather
- disturbingly pleasant (and quick) death of hypothermia.
- --
- Mark Underwood
- EE Student, University of Kentucky
- Lab Assistant, UK Library Microlabs
- Internet address: msunde01@mik.uky.edu
-
- "Cogito, ergo Sum." - Descartes
- "Non Cogito - poof!" - Anonymous
-
- * My opinions are Mine! Hands off! *
-