XPost: sci.space.policy, sci.physics   
   From: invalid@invalid.com   
      
   On 10/12/2016 7:03 PM, Fred J. McCall wrote:   
   > Serigo  wrote:   
   >   
   >> On 10/12/2016 3:09 PM, Fred J. McCall wrote:   
   >>> jimp@specsol.spam.sux.com wrote:   
   >>>   
   >>>> In sci.physics Fred J. McCall  wrote:   
   >>>>   
   >>>>    
   >>>>   
   >>>>> Really?  You think we breath NITROGEN?  Uh, no.  We just use the   
   >>>>> oxygen.   
   >>>>   
   >>>> We use the oxygen but what we breath is 78% nitrogen.   
   >>>>   
   >>>   
   >>> And what we breath out has the same amount of nitrogen in it, so you   
   >>> don't need any more but to replace leakage.  And nothing says you HAVE   
   >>> to use nitrogen for the inert component of atmosphere or that you have   
   >>> to run 15 psi.   
   >>>   
   >>   
   >> what else are you going to use ?  do you have any ideas ?   
   >>   
   >   
   > You can use anything you like, as long as it's non-toxic.   
      
   wrong criteria.  name a gas, and I will show you the problems with it.   
      
   > Or you can   
   > use nothing at all.   
      
   you have to use something, nothing is pure O2 and that makes plastics   
   into explosives.   
      
      
   >   
   >>   
   >> N2 is the only practical one.   
   >>   
   >   
   > No, but it's probably the simplest and cheapest.   
      
   if no, name a gas.   
      
      
   >   
   >>   
   >> and you have to take a lot of it,   
   >>   
   >   
   > Not really.  After all, it's not consumed so you really just need   
   > enough to fill the people spaces plus a little left over for 'make up   
   > gas'.  There's nitrogen on Mars,   
      
   it is a rare gas on Mars, less than 0.002% so you are going to haul up   
   an air liquifying plant to Mars ?   
      
      
   > so you don't need to haul it all in.   
   > Or you could just use pure oxygen, if you're willing to accept the   
   > fire danger.   
      
   cannot use pure O2, google Apollo 1 fire.   
      
   and try to keep up, more reading of books   
      
      
   >   
   >>   
   >> all in *high pressure heavy* tanks.   
   >>   
   >   
   > Oh, don't be silly.   
      
   what does N2 come in ?   
      
      
   >   
   >>   
   >> do you have an alternate inert gas in mind ?   
   >>   
   >   
   > You don't absolutely need an inert gas,   
      
   if it is not inert, the gas reacts with materials, and people   
   you dont seem to know much.   
   ...   
      
      
   > but you could just take both   
   > the nitrogen and argon out of the Martian atmosphere and use that.  Or   
   > you could get nitrogen from nitrogenous regolith.   
      
   such as...      try naming them   
      
   there are no piles of bat shit on Mars.   
      
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