Re: [Phys-l] Movie Physics Gafs

[brian whatcott <betwys1@sbcglobal.net>]

On 9/12/2011 1:22 PM, Bob Sciamanda wrote:
> Here is a video showing a compass made from a needle magnetized with a silk
> cloth!
>
> http://www.youtube.com/watch?v=wIGbNJDYdnM&feature=player_detailpage
>
>
> From: Bob Sciamanda
Or, to be more precise, a choice of several methods:
 ferrite loaded rubber or plastic, the remanent field in a sheath knife 
- and a piece of silk.

That looks like a barely passing grade of 67% - but wait - didn't I read 
that the theses of
 physics PhD students are shown to be substantially wrong within ten years
about 50% of the time?

66% versus 50%??

That puts this demo about 33% more reliable than the average doctoral 
thesis in Physics?

:-)

Brian W