[LMB] (chat) new essay

[Nicholas Rosen]

William A. Wenrich wrote:

> Note to Nick Rosen on the lift tube/Perpetual motion machine: Aren't you
> assuming that the power used by the lift tube is not proportional to the
> weight lifted? If you don't count that, an ordinary elevator is a PM.

Not quite, although perhaps I should have made myself clearer.
I did note that a lift tube was not a PM if it received external
power, presumably enough to lift all the weight lifted.  But there
might still be problems with edge effects, I said.


Regards,
Nicholas D. Rosen
http://ndrosen.livejournal.com