Michael J. answered  02/27/17
Tutor
                    
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            Effective High School STEM Tutor & CUNY Math Peer Leader
1)
All magnets have 2 poles located at the ends.  One end is North Pole.  The other end is South Pole.
2)
Like poles repel each other.  Opposite poles attract each other.  North Pole is attracted to South Pole. 
3)
Incomplete question.
These should give you a hint to your questions.
     
     
             
                     
                    