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1. If the hanging bar magnet, moving independently. When it stops, and then the pointer along the North South Pole pointing toward the North Pole (N) is called the. The point to the South Pole, called the South Pole (S). 2. magnetic polarity, both the North and South Pole will always attract magnetic substance. 3. the same polarity will close strong. And with different polarity when close to a strong suction occurred. 4. the power of gravity is greatest at two magnetic pole. 5. magnetic force line direction from North to the South Pole.
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