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The phrase 'unlimited free energy' does not mean 'any energy source other than coal, petroleum, or nuclear'. It means energy 'pulled' or 'created' from some source not otherwise already available, somehow outside the reach of thermodynamics.
Originally posted by rnaa
See my reply to funk Bunyip above.
An 'over unity' device, that is, one that produces more energy than it consumes is exactly something that would be creating energy out of nothing.
And its use would indeed add to the heat signature of the local system.
Replacing petrochemical and coal energy sources with this kind of system would kill the planet very quickly indeed.
Of course there are untapped energy sources. But everyone of them current or future, every single one, is a process of converting existing energy stored in one form to energy in a form that we have grown accustomed to using to do work.
Burning coal doesn't add to the energy signal of the planet, because it is converting energy, not creating energy.
Global warming is not caused by the heat of burning coal or petrol. It is caused by the greenhouse gases that are released by burning coal or petrol trapping energy from the Sun that would have otherwise been radiated out into space.
So we are keeping more of the energy than we would had we not increased the greenhouse gases in the atmosphere.
Likewise, if we were to introduce another source of energy (heat) from outside the realm of thermodynamics, we would soon be (not) living on a planet dead from the heat.
Originally posted by rnaa
Windmills are not 'unlimited free energy'. Windmills convert energy from one form to another. They do not produce more energy than is input, in fact they are quite inefficient. Neither do photovoltaics, geothermal or hydro. Strictly speaking, windmills are powered by the Sun (in the same way that the Atmos clock is) and adhere absolutely to the laws of thermodynamics.
The phrase 'unlimited free energy' does not mean 'any energy source other than coal, petroleum, or nuclear'. It means energy 'pulled' or 'created' from some source not otherwise already available, somehow outside the reach of thermodynamics.
Bringing it into the reach of thermodynamics, by making it usable in the 'real' world, means increasing the total energy state of the local system. This means eventual heat death. Talk about Global Warming gone crazy!
Toys like magnetic motors can be made quite efficient, but they are still subject to friction, heat loss, etc, etc, etc. They can NEVER be made to produce more energy usable or not than they consume. They will always produce exactly the amount of energy that is input, except that some of that energy will be lost as unusable heat. Always.
This
account obviously does not explain much about the circuit.
Indeed, in the Feynman lectures we read:4
‘‘We ask what happens in a piece of resistance
wire when it is carrying a current. Since the wire
has resistance, there is an electric field along it,
driving the current. Because there is a potential
drop along the wire, there is also an electric field
just outside the wire, parallel to the surface ~Fig.
27-5!. There is, in addition, a magnetic field
which goes around the wire because of the current.
The E and B are at right angles; therefore
there is a Poynting vector directed radially inward,
as shown in the figure. There is a flow of
energy into the wire all around. It is of course,
equal to the energy being lost in the wire in the
form of heat. So our ‘‘crazy’’ theory says that the
electrons are getting their energy to generate heat
because of the energy flowing into the wire from
the field outside. Intuition would seem to tell us
that the electrons get their energy from being
pushed along the wire, so the energy should be
flowing down ~or up! along the wire. But the
theory says that the electrons are really being
pushed by an electric field, which has come from
some charges very far away, and that the electrons
get their energy for generating heat from
these fields. The energy somehow flows from the
distant charges into a wide area of space and then
inward to the wire.’’ ~emphasis added!.
However, the result of such an application
and the resulting energy transfer in the circuit apparently did
not satisfy Feynman. He wrote: ‘‘this theory is obviously
nuts, somehow energy flows from the battery to infinity and
then back into the load, is really strange.’’4 Feynman, however,
did not persist and left the problem for others to find a
reasonable explanation. Can we say more about energy transfer
in this simple circuit?
sites.huji.ac.il...