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Author Topic: How do liquids behave in space?  (Read 4580 times)

Offline thedoc

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How do liquids behave in space?
« on: 06/09/2011 17:58:12 »
If you are in space and you throw liquid into space, does its become a solid or gas, or does it stay the same?
Asked by JR


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« Last Edit: 06/09/2011 17:58:12 by _system »


 

Offline thedoc

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How do liquids behave in space?
« Reply #1 on: 06/09/2011 17:58:12 »
We answered this question on the show...



Dave -   It fundamentally depends on the liquid and where you are in space.  If you throw water out in space, about where we are in the solar system, what's going to happen is that any water that evaporates off it isn't going to come back again Ė itís a hard vacuum.  So itís going to boil away and as it does that, itís going to get colder.  At some point it might freeze but eventually then it will still sublime and eventually itís going to all turn into a gas.  If you did the same thing where itís very, very cold out near Neptune or something, then it would be so cold that it would just freeze. If you did get a bit of evaporation, it will cool down and freeze and essentially stay there as a lump of ice.  If you use different liquids, different things will happen.  Things like ionic liquids, they boil away so slowly that you could just have a blob of them them which sat around as a liquid permanently.
Chris -   And what about on the international space station if an astronaut sort of had one of those burps that occasionally has a little bit of follow through for example or just squeezed his packet drink a bit hard, what would you see?
Dave -   So, if itís not going to evaporate then the major force affecting it is surface tension, the only force which is left.  So essentially, you get a huge droplet of water which is kind of held together by surface tension that would bobble around and just sit there floating in space until heíll either drinks it or it hits something.
« Last Edit: 06/09/2011 17:58:12 by _system »
 

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How do liquids behave in space?
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