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Unread 20-02-2010, 11:19
Michael Ogden Michael Ogden is offline
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Re: Kinda stupid question...

Let's see here... density of air is 1.204 kg/m^3, which converts to 0.0789 lb/ft^3; and density of helium is 0.1786 kg/m^3, which converts to 0.0117 lb/ft^3. So we are saving 0.0672 lb/ft^3 by replacing air with helium. I.e., not a big difference.
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