On Thu, 25 Nov 2010, francis wrote:
Some ideas - I recently saw a demonstration of paramagnetism where rare
earth magnets are dropped down a copper tube and fall very slowly due to the
Like this? http://www.youtube.com/watch?v=nrw-i5Ku0mI
That's the copper tube and neo supermagnet I was selling at various flea
markets and ham radio fests.
coppers aversion to the motion of the field - I have to wonder how a
stationary field with a rotating copper tube
Like this? http://www.youtube.com/watch?v=glCNP6qH_Dc
I built that for a science museum exhibit that never went forward.
Also, the "Searl disk" setup should actually work to confine some cylinder
magnets in the narrow slot between a rotating copper ring and a smaller
rotating disk placed within the ring. (The ring and disk spin opposite.)
There are restoring forces in all directions, so if the ring and disk are
adjusted to the right speed, the cylinder magnets should hang suspended,
motionless in the gap.
(((((((((((((((((( ( ( ( ( (O) ) ) ) ) )))))))))))))))))))
William J. Beaty http://staff.washington.edu/wbeaty/
beaty, chem washington edu Research Engineer
billb, amasci com UW Chem Dept, Bagley Hall RM74
206-543-6195 Box 351700, Seattle, WA 98195-1700
