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On Fri, 1 Sep 2006, Stephen Montgomery-Smith wrote:
Mike Miller wrote:
On Fri, 1 Sep 2006, Michael wrote:
If you doubt the possibility of a free energy engine, ie a perpetual
motion machine, I'd suggest studying Tesla.
It looks like "free energy" means that you don't have to pay for it.
That is entirely different from a perpetual motion machine. In
perpetual motion there can be no external source of energy, not even a
free one. Thus, the Earth's rotation, Earth's magnetic field, power
from the Sun or movement of air are all not allowed in perpetual
motion.
Is there any energy source we humans use that doesn't come from the sun,
at least indirectly?
I don't think so. It is possible to get some energy from rotation and
from the magnetic field of the Earth. I guess we don't use it though.
If the Sun were to stop irradiating our planet, I don't know what that
would do to our rotation and to our magnetic field, but I think both would
continue for quite a while. I think the air would freeze very quickly.
We would all die and all life on Earth would end soon afterward.
Did anyone see the special 2-hour episode of 20/20 on the "last days" on
Earth? They obviously wanted to appeal to Christians who are thinking
about this these days, but the show seems to be all about science and what
it says about how life will end on Earth. I have it in TiVo but haven't
watched it yet. More here:
http://abcnews.go.com/2020/story?id=2319986
Mike
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