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A 5.0 mg bad with a charge of 2.1 nC rests on a table


A 5.0 mg bad with a charge of 2.1 nC rests on a table. A second bead with a charge of -5.3 nC is directly above the first bead and is slowly lowered toward it. 


Part A 

What is the closes the centers of the two beads can be brought together before the lower bead is ined off the table? 

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