Energy in a permanent magnet question

The model I use to think of a PM magnet is a shorted inductor i.e. electromagnet made with superconducting wire and a DC current flowing in the wire. Some work was done to start the current flow and that energy is stored in the current flow and of course creates a magnetic field. If the wire resistance is ==0, that can sit in steady state forever like a PM..

If you move a hunk of metal near the (electro) magnet, it changes the current flow because there is a change in the stored energy. Depending on which way the mechanical force is going you can add or remove current/energy. If you remove enough energy, the current will be zero.

While that model makes sense to me, I'm not sure however if it is correct :-)

Mark

photons.

Only way it "dies" is via hawking radiation AFAIK,

So that is where the energy goes.

.highlandtechnology.com=A0 jlarkin at highlandtechnology dot com

Round off, down to almost nothing.

.highlandtechnology.com=A0 jlarkin at highlandtechnology dot com

One quenched at my friend's development lab. He lost $3,000 worth of helium in a few seconds!

to

t.net ---

uh, vanishes, as in fades away, does not supply a lot of photons. Oh, right, it's a black hole so the photons can't escape.

can you bury magnetism in a shallow grave to make hundred year old magnetism.

i am REAAALLLLLY worried

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One AA in the LED display would be more than enough.

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For the LED's but not for the motor though I expect it is slowing down anyway.

Hardy

When a black hole dies it's by hawking radiation: photons.

=A0Oh,

If the dieing flash represents ALL the energy inside the black hole, then that must be SOME flash, eh?

It doesn't come out all at once - the effective temperature is inversely proportional to the mass. And it can take a long time, a solar mass black hole lasts 2E67 years...

But yes there is a big flash at the end.

Hawking radiation isn't all photons. But it is (per current theory at least) how a black hole dies.

No one's gotten close enough to a black hole to prove out Hawking radiation one way or another, although if it doesn't exist it would require some rearrangement of quantum mechanics, relativistic physics, or both.

"A Globe in Every Home"

ct

New Zealand, but does that make any real difference?

I pictured a little hawker's stall: Photons for Sale: 5 Cents

It must go down. The magnet did work pulling the object in. The energy stored in the magnet goes back up [1] when you pull the object off.

LOL!

How about a sideshow barker calling out "see black hole photons in person"?

?-)