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4540Re: [hobbicast] Re: Heavy Theory--gas pressure debate etc.

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  • John Grant
    Jul 2, 2001
      LLandstrom wrote:

      > Why mess around with helium. Get a glass bottle, fill
      > it halfway up with lye, stuff some crumpled up
      > aluminum foil into it into the lye. then put a balloon
      > over the end and watch it fill up with hydrogen which
      > is half the weight (twice the lifting force) of
      > helium.

      Half the weight but not twice the lifting force.
      You have to compair the density of hydrogen to air and the densety of helium to air.

      John Grant
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