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Grace Thompson——Studied at Harvard University, Lives in Boston. Passionate about environmental conservation and currently working for a non-profit organization.
With electricity, there are positive and negative charges. With magnetism, there are north and south poles. Similar to charges, like magnetic poles repel each other, while unlike poles attract. ... So do magnetic fields, but from moving charges, or currents, which are simply a whole bunch of moving charges.read more >>+119962023-04-24 01:24:30
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