Natural Science Forum / Physics / Electromagnetism / August 2004

Can the spin "of water" be changed with magnets? or other such EMF

Hi
 I'm doing a project which involves propeling a model Maglev train. I want to
use Linear motors like a brushless linear DC motor. I'm not sure, though, when
I make the linear motor how to switch the poles in the electromagnet and how to

Can anyone try and explain what spintronics is, and how it works?

Hi guys!  Working on a project (small induction heater) and want to find how
the coil couples to the load.
(Yeah, okay, long story, but I wasted last night on it.  So bear with me.

Newbie Question:
I read recently that the US Navy had or was going to equip one of its
destroyers (I believe) with a Rail Gun.
I'm just curious, in today's modern Navy, how to they plan to fire the thing

Please excuse my ignorance in this area.  What exactly is making up
the magnetic lines/flux. I understand that the flow of free electrons
is an electrical current and that it produces a magnetic flux.  But
what is this flux made up of? Is it free electrons that are flowing

It's Jim Woodring's deliciously disturbing work "Pushpaw," in
animated form.  The biological entities in his universe... do
they manipulate spacetime?  Are there more than three spatial
dimensions?  Is it all just a dream?  What?!!!

Is it correct to say that no EM scattering can take place if there are no
induced currents in the object being irradiated?
e.g.
In a phased antenna array there is an interference pattern produced by the

Some people on another list are trying to tell me that Dr. Persinger is a
respected scientist.
Apparently this guy in involved with a device that he claims will give you a
"spiritual experience", he calls it "the god machine" and/or "Shakti Lite".

Hi, I am looking for a pair of electromagnets that are powered by
household batteries such as AA,C D, 9V.  I want to incorporate these
into the palms of a pair of gloves.  It would only have to be able to
lift up to 10 pounds.  Are there any household appliances that I can

Hi
    I am making a model Maglev train which I want to propel by a linear DC
motor. My question is, what can I use as a commutator for the Linear DC motor.
I have come across one method which is using a Hall Effect sensor (which I

Is there anybody interested in the field of propagation in random media?
Nicola Arnoldi

can anyone tell me what the current best estimate for the cross sectional
'diameter' is for the nucleus (proton) of hydrogen atom is please and the
associated theory or experiment that goes with it??

We are working on a replacement device for the now obsolete Siemens
KSY10 and KSY13 sensor. For this purpose I need a magnetic field. Do
you have links, background information on:
- how to generate a good homogenous field, it must range from very

I'm designing an electric wheelchair / buggy for a disabled user but I
don't know much about the physics side of motors.
The wheelchair has to be able to lift 250kg up a 30% slope (17
degrees).