a.How did your permanent magnet affect the nail?
b.How long did the temporary magnet stay magnetic?
c.Why do you think the magnetic effect did not last for a long time?
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a.How did your permanent magnet affect the nail?
b.How long did the temporary magnet stay magnetic?
c.Why do you think the magnetic effect did not last for a long time?
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Answer:
A.) The magnetic field of the bar mag- net causes many of the tiny magnets in the iron nail to line up in the same direction and the nail to become a magnet.
B.) This loss of magnetic strength will occur in a permanent magnet at the temperature of 80oC. But, a temporary magnet, on the other hand, can lose its magnetism within a single hour. And this loss of magnetism will depend on how the magnetic material is used.
C.) In order for a permanent magnet to no longer be able to perform its intended function, it would need to lose part or all of its ability to create a net external field.