[Spridgets] Fwd: 7 MRI's

[Macy Larry]

OK OK OK, I am going to ask the physicist that runs the 7 Tesla unit and get the correct answer. All I recall from an earlier discussion was that it is NOT caused by any kind of mechanical or pounding, even though it sounds like it.

Larry

On Jan 5, 2011, at 3:35 PM, Dave KK7SS wrote:

> Ferrous content is only meeded to induce a magnetic field in the material.
> 
> It's not a case of the air becoming magnetic. It's that magnetic fields affect molecular behaviour...
> 
> Check up on Plasma bottles...
> 
> Dave G  KK7SS
> DN06ig
> 
> '65 Sprite - in process
> '76 Midget - driver
> 
> ----- Original Message -----
> 
> 
>> Electricity does move air, so why not magnets??
> 
> 'cause the air does not (hopefully) contain iron, the key ingredient to magnetism. The sound is likely the magnets resonating, or more simply the coils vibrating as they are pulsed.
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-- 

Larry B. Macy, Ph.D.
macy at upenn.edu
Senior IT Program Director
Neuropsychiatry Section
Department of Psychiatry
University of Pennsylvania
3400 Spruce St. - 1015 Gates
Philadelphia, PA 19104

The individual has always had to struggle to keep from being overwhelmed by the tribe. If you try it, you will be lonely often, and sometimes frightened. But no price is too high to pay for the privilege of owning yourself.

Friedrich Nietzsche