Originally posted by nmdavidb There will always be "Which came first...the chicken or the egg?'
Or "...the can or the can opener?"
My fave is always the Steven Wright joke..."If I melt dry ice can I swim without getting wet?"
Anybody else got some of these?
Dave
That's easy.
1. The egg.
2. The can. read http://en.wikipedia.org/wiki/Can_opener
3. Dry ice is called "dry ice" because it goes through sublimation in normal pressure conditions - it goes straight from solid to gas, hence leaving its surroundings dry.
If you were to melt dry ice, you would have do it in a highly pressurized environment. If you will be in a pressure suit, it is logical to assume you won't get wet; if not, you will get wet (as if you were immersed in any other sort of liquid)... and you might also get crushed by the pressure.
2. The can. read http://en.wikipedia.org/wiki/Can_opener
3. Dry ice is called "dry ice" because it goes through sublimation in normal pressure conditions - it goes straight from solid to gas, hence leaving its surroundings dry.
If you were to melt dry ice, you would have do it in a highly pressurized environment. If you ...[text shortened]... ere immersed in any other sort of liquid)... and you might also get crushed by the pressure.
Provided all airspaces in the body are equalised, pressure isn't a problem until oxygen becomes toxic at ~8 atm. CO2 is a liquid at this pressure at about -50C, so provided you can stick the cold for a few minutes, you'd swim around, then start depressurising and/or increasing the temperature and it would simply boil off. Have some burn cream ready though... (the freezing point of water doesn't change appreciably over that pressure range)