> EvMick@aol.com wrote: What is less dense than nothing?
Nothing. But hydrogen is pretty close and it would let you
out of a lot of engineering problems.
>How about a vacumn dirgible? Can such a structure be made light enough?
Ja, a vacuum dirigible would lift, assuming you could work out
the structural problems, but keep in mind that if air has a mass
of 29 somethings, the same volume of helium has a mass of only 4,
and the same volume of hydrogen has a mass of 2, where vacuum
would be zip.
You are mosta the way there with one of these light gases.
I chooooooose.... helium, and I dont hafta worry about
collapse of a highly stressed structure or a Hindenburgesque
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