Re: Fires in the land


"Dave B" <debco99@xxxxxxxx> wrote in message
news:pod9159iot12l8aac56e4ncpq8cklaeon0@xxxxxxxxxx
On Wed, 20 May 2009 21:43:57 -0400, "vinny" <vinny@xxxxxxxx> wrote:


"vinny" <vinny@xxxxxxxx> wrote in message news:gv2b7l$v41$1@xxxxxxxxxxxxx

"vinny" <vinny@xxxxxxxx> wrote in message
news:gv2ant$urk$1@xxxxxxxxxxxxx

"Cliff" <Clhuprich@xxxxxxx> wrote in message
news:9n891598sqlgvefccqhva6lrhv9it1h60m@xxxxxxxxxx
The US military burns bibles.
This is clearly another example of government waste.

Many people need toilet paper.
--
Cliff

You shouldn't ever insult what other people feel is sacred. Whether
it's
the Koran, Bible, or any other documents.
Unless of course you feel you know it all. But just remember, everyone
thinks they know it all....well, except me. I am in the minority that
thinks we are blind, deaf and stupid. Science is cool, but has been
wrong
more than not.
My guess is in everything people believe, religion, science, feelings,
it's mixed truths and lies and confusion.

only a continuous search for the truth by never assuming your 100%
right
is intelligence. All other is ignorance.





Magnetism. Hell we know what that is for sure right, it's electricity?

According to Einstein, the velocity of the observer determines the
amount
of
electric field and magnetic field which he sees.



The long thin wire theory:

Text books usually include a number of examples in which the magnetic
field
can be calculated. One of these is the long thin wire. A uniform current i
is said to flow down a long straight wire which is considered to be
infinite
in length. The wire is surrounded by a circular magnetic field. A formula
can then be deduced by integration for the magnetic field strength at a
distance r from the wire.


So far, so good.

The problem comes when we apply Faraday's law of induction to the
situation.
We start with a wire with no current flowing and try to establish an
electric current in it. The magnetic flux which will surround the wire is
generated within the wire and moves outward. As it does so, it induces a
voltage in the wire opposing our attempt to generate the current. Common
sense says that an infinite wire will generate an infinite voltage and we
will not be able to establish the current. However, since infinite wires
are
impossible, it is but a small step to assume that we have infinite
voltages
available and resolve the problem by considering what happens to 1 metre
length of the wire. We should be able to calculate the flux surrounding
this
and find the induced voltage. But the answer we get is still infinity.





It turns out that this is an unsolvable problem, but in attempting to
solve
it, we make a discovery of great importance. One of the lines of enquiry
is
to consider the current as moving electrons. The simplest current of all
would be a single electron. The velocity of the electron would generate a
magnet field around its line of motion and changes in the velocity of the
electron will require magnetic flux to move through the surface of the
electron. The resulting electric field will resist the change in velocity
of
the electron.



Cliff will be here soon and explain this to all of us.

How is the job search going Vinny? Good Luck!

Vinny's gonna need some luck if his prospective employer reads *this*
thread!

Goodgawd, vinny, are you eating alright, or is someone switching up yer
meds??

If this helps, one correction to perhaps many errors in yer previous posts
is that just cuz a wire is infinite dudn't mean it requires an infinite
voltage.... just a zero resistance.
And, at zero current flow, not even zero resistance!

But, for purposes of idealized examples, resistance is justifiably set to
zero.
The units of voltage are newtons per coulomb, and thusly voltage is not
dependent on distance or geometry.

However, the *electric field* induced by a voltate IS geometry dependent --
the units are volts/meter -- and can (but not necessarily must) vary with
distance, in a variety of ways.

For example, the electric field between two infinite parallel plates at
voltage V *is* constant, regardless is distance between the plates.

The electric field between two concentric spheres would vary with 1/r^2, and
that of an infinite wire 1/log r.

The electric field at any cusp is near-infinite, which is why sharp objects
at a moderate voltage can still arc.

If I remember this *** correckly, at any rate.

This *** and a token may get you on a NYC subway.
--

Mr. PV'd

Mae West (yer fav Congressman) to the Gangster (yer fav Lobbyist):
Hey, Big Boy, is that a wad (of cash) in yer pocket, or are you just
glad to see me??









DaveB


.

Loading