--- "Schroeppel, Richard" <rschroe@sandia.gov> wrote:
c) The halving-density height of air is about 3.5 miles. A 35 mile deep well would have air that's a little denser than water at the bottom. (Might be interesting to jump into!) The density near the center of the earth would exceed black hole numbers, except that the gas laws wrt compression and pressure fail.
The density of CO2 at the bottom of the space tube would for the same reason also be at liquid density. This refutes the air buoyancy argument that apparently reduced slightly the energy requirement for this process.
e) I think the halving-height of a gas depends on the molecular weight, and that pure CO2 would have a smaller halving height.
Yes. For an ideal gas of molecules of mass m at temperature T, the density varies with height z as exp(-mgz/kT), Boltzmann distribution. This applies to the individual constituents in a mixed gas atmosphere. Gene __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com