In article ,
wrote:
And, of course, the heat stored during expansion will be released when
it cools down.

Obvious to everyone but Dave. Pressing a spring by expansion then
releasing it by unexpanding doesn't really do any work, it just
temporarily stores some energy.

So you can press a spring in your little world with no energy involved?

And if it released an equal amount of energy on release, you'd have the
perfect energy storage solution.

Do you ever think before posting?

--
*Reality is the illusion that occurs due to the lack of alcohol *

Dave Plowman London SW
To e-mail, change noise into sound.