Pardon if this is old news, but a 'spin battery' is potentially a very efficient energy source. From the presentation:
"The Spin Battery" -- Stewart E. Barnes http://www.physics.miami.edu/~barnes/SpinBattery.pdf (SLIDE 30) Theoretical Maximum If one changes the magnetic state it is possible to recover the Jsd ~ 4eV exchange energy. This gives 4.0 x 10^6 J/kg. Also see - "Theoretical spin battery could see magnet powered cars" http://www.gizmag.com/spin-battery-magnet/11271/ -- Lou Pagnucco Jones Beene wrote: > It is a surprise that there is quite a bit of negativity on vortex for > this demo. > > That skepticism could be related to the 5 or 6 other similar claims on > Sterling Allan's PESN site which show signs of scam or trickery, but what > is > specific problem with this one ? ... A noted professor (Duarte) has been > allowed to check for hidden batteries or motor - and says there is no > trickery. > > Magnetic fields store energy, not a lot of energy compared to chemical, > but it takes energy to align magnetic polarities and this amounts to stored > spin-energy. Iâm not sure that the energy density of a magnet can be > [...]
