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   rec.arts.sf.written      Discussion of written science fiction an      448,027 messages   

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   Message 446,625 of 448,027   
   Scott Dorsey to psperson@old.netcom.invalid   
   Re: xkcd: Metric Tip   
   10 Nov 25 10:03:48   
   
   XPost: rec.arts.comics.strips   
   From: kludge@panix.com   
      
   Paul S Person   wrote:   
   >Bing is your friend:   
   >   
   >A pound per square centimeter (lb/cm=B2) is a non-metric measurement   
   >unit of surface or areal density. The surface density is used to   
   >measure the thickness of paper, fabric and other thin materials.   
      
   Bing is definitely not my friend.  For one thing, it's not a non-metric   
   measurement, it's partially metric.  And it's a very curious way to measure   
   surface density.   
      
   You might want to do that if you have a material that is measured in metric   
   units, but whose total mass is measured in American units.  That's what I'd   
   like explained.   
      
   >So, did the facility (by any chance) work with/produce thin materials   
   >whose thickness needed to be measured?   
      
   No, it was a wind tunnel.  But I think the basic source again was   
   measuring density of something derived from mixed units.   
   --scott   
   --   
   "C'est un Nagra. C'est suisse, et tres, tres precis."   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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