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OpenStudy (anonymous):
Two unequal point charges repel each other with a force of 0.2 newtons when they are 10cm apart . find the force which each exerts on the other when they are (a)1cm apart (b) 5cm apart
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OpenStudy (anonymous):
U can do it the long and easy way.. by considering q1, and q2 to be the charges and initially r = 10.. set up the coulomb's law.. then change r to 1 and get the new equation.. divide!
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