AdmiralCheez wrote...
Bamboozalist wrote...
If you *don't* try to hold your breath, exposure to space for half a minute or so is unlikely to produce permanent injury. Holding your breath is likely to damage your lungs, something scuba divers have to watch out for when ascending, and you'll have eardrum trouble if your Eustachian tubes are badly plugged up, but theory predicts -- and animal experiments confirm --that otherwise, exposure to vacuum causes no immediate injury. You do not explode. Your blood does not boil. You do not freeze. You do not instantly lose consciousness.
The sciene, I did not know it before, it intrigues me, but we were waltzing around in space for a bit longer than thirty seconds. And you know what? Screw the extreme temperatures, the dangerous radiation, and the near-zero pressure: consider the bullets.
Radiation is the only thing that you listed that will cause any harm and considering none of the ME2 squad mates are walking around in ships, stations, and other places that would be shielded from that your point is moot.
1. Space does is not hot or cold, it's nothing. Things freeze/boil in space because of the pressure difference NOT because of the tempature. Your blood would not boil because your body regulates the pressure, the saliva on your tongue would boil but every ME2 squad mate has their mouth covered so that point is moot.
The vapor pressure of water at 37 C is 47 mm Hg. As long as you keep your blood-pressure above that (which you will unless you go deep into shock) your blood will not boil. The body regulates blood pressure as a gauge, rather than absolute pressure (e.g. your blood vessels don't collapse when you dive 10 feet into a pool).
2. First off it's not near-zero it IS zero, secondly that's only a ONE atmospheric pressure difference, you know what that does to you? According to NASA "[mild, reversible, painless] swelling of skin and underlying tissue". To put this in perspective of how little one atmosphere of pressure is at around ~10m under the ocean you're at roughly double normal atmospheric pressure. Human's can dive with training to ~300m and a normal human depending on how well in shape they are can take ~100m to 200m.
The reason that a human does not burst is that our skin has some strength. For instance compressed oxygen in a steel tank may be at several hundreds times the pressure of the air outside and the strength of the steel keeps the cylinder from breaking. Although our skin is not steel, it still is strong enough to keep our bodies from bursting in space.
TL:DR - This is a case of reality being unrealistic. Just like cars don't explode, space isn't THAT deadly. As long as you can breathe and deal with the unfiltered radiation you're fine.
Modifié par Bamboozalist, 22 décembre 2010 - 04:09 .
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