Name: Anonymous 2008-01-20 3:12
Say you had a gigantic electromagnet sitting in space, vaccuum, no other forces around.
50 miles away, there is a little permanent magnet.
When you flip on the electromagnet at t=0, how long does it take before the little magnet starts to move? You are standing at the base of the electromagnet, if that makes any difference.
50 miles away, there is a little permanent magnet.
When you flip on the electromagnet at t=0, how long does it take before the little magnet starts to move? You are standing at the base of the electromagnet, if that makes any difference.