Re: Work of Magnet on Fridge, etc. questions

On Mar 13, 3:02 am, "Sue..." <suzysewns...@xxxxxxxxxxxx> wrote:
On Mar 12, 3:02 am, timmy <hg...@xxxxxxxxx> wrote:





On Mar 12, 11:42 am, "Sue..." <suzysewns...@xxxxxxxxxxxx> wrote:

On Mar 11, 10:24 pm, timmy <hg...@xxxxxxxxx> wrote:

Hi,

Work is defined as force times distance travelled. If
you are carrying a basket and you are standing steady.
There is no distance travelled so no work but there
is work in the molecular level.

In the case of a magnet stuck on a refrigerator. It
requires effort to let it remain stuck much like
holding say a glass against the ref. The magnet
electrons have internal spin which is parallel
hence producing polarized magnetic force. Now
can't we say the internal spin produces work
to enable the magnet to remain stuck on the ref
forever?

No... the electron's "spin" is a mathmathical
abstraction. We can, at best say it
"holds the electron together". It is very tiny
on a macroatomic scale.

http://en.wikipedia.org/wiki/Stern%E2%80%93Gerlach_experiment







What's the characteristic of the work
of the electron internal spin and where does it
gets its never ending energy?

It turns out that charges in the magnet on your fridge
move on a path that minimises electromagnet radiation
and conserves energy.

Removal of the magnet causes radiation that can be
related to work or energy.

"Keepers" are often placed across open magnet poles
to prevent inadvertant radiation and resultant decay
from nearby moving objects.

http://www.tpub.com/neets/book1/chapter1/1j.htm



"The origin of permanent magnetism"

http://farside.ph.utexas.edu/teaching/316/lectures/node77.html



Same with gravity. It requires work for the
spacetime continuum to curve to respond to
mass and energy. Where does the spacetime
continuum acquire its energy? Is this an example
of a perpertual machine?

The principle is exactly the same.  Planets move
on a path that conserves and minimises the radiation
of energy.

--C. P. Kouropoulos

http://arxiv.org/abs/physics/0107015



Btw.. magnetic field from say power lines are
caused by the current with say a frequency of
60 hertz.. in the case of the quantized spinning
electron. Is there a frequency component due to
quantization?

Yes...

http://en.wikipedia.org/wiki/Zitterbewegung



Sue...

Thanks.

Timmy-

why do you know so much? are you a professor?

Of course not! Professors are willing to learn
so they can't know that much.   :o)

No ordinary mortals can know things like you do.
Either you are a genius or you are like Jesus.

Thank you

timmy boy




say... if magnets have perpetual currents running
around... do you know how to add light bulb to it
so the current in the magnet can light up the bulb?

Sure...http://en.wikipedia.org/wiki/Homopolar_generator

But there is nothing *perpetual* about it.

<<invariance with respect to time translation
gives the well known law of conservation of energy >>http://en.wikipedia.org/wiki/Noether's_theorem

Sue...





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