Does anyoneone know if permanent magnets (eg boron) are reduced in their strength by being used...
Yes, permanent magnets (ferromagnetic materials) lose their strength. But they can be magnetized again by using a strong magnetic field. They even can be demagnetized by using a certain magnetic field.
Can also be demagged by being exposed to heat higher than the Curie point.
But I beleive you would have to force 2 like-poles closer to each other, past the point they naturally repel each other to make them lose strength - just a guess...
PS> *Anything* is possible, just some things aren't likely - not on this planet anyway.
I'm sure that the laws of thermodynamics absolutely don't apply *somewhere* in our galaxy/universe.
Just so the Universe gets the last laugh at mankind...
