Recent content by mtrip

  1. M

    Gas in a semi permeable membrane - one for the gas experts

    Thanks for the reply. I understand the second paragraph, but not clear on the first. Assuming for the moment that the pressure inside the small balloon is the same as the pressure on the outside, it shouldn't matter what kind of gas it is, correct? It's really only the pressure difference that...
  2. M

    Gas in a semi permeable membrane - one for the gas experts

    I believe I know the answer to this question; I need an expert to verify it for me. I work for a company that makes latex balloons. The people that have been here for a long time insist that if one is putting a small (5" balloon) filled with helium inside a larger (30") balloon then one must...
  3. M

    Building an atmospheric chamber

    Building an "atmospheric chamber" I have to build a chamber (ok, large box) to do some atmospheric pressure tests. The box will be 48 inches square. I have to simulate going from sea level (0 feet, 14.696 psia) to 7000 feet (11.34 psia). I'm thinking of building the "box" from 3/4" plywood...
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