On Sat, Aug 3, 2013 at 2:27 AM, David Roberson <dlrober...@aol.com> wrote:
> > Any bolts, or other steel pieces nearby would be drawn to the box and I > find it difficult to believe that this would not be detected. > Nearby has to be very nearby. I have worked with many N45 NeFeB magnets (1.25 T), some of significant size, and we rarely saw things jump off the table. You have to be pretty close to attract even another magnet. The force falls off rapidly. Here's a calculator: http://www.kjmagnetics.com/calculator.asp?calcType=block Convince yourself.
