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Mathematics 11 Online
OpenStudy (anonymous):

Need help with Calculus I applied maximum and minimum word problem. The potential energy E of an electric charge q due to another charge q1 at a distance of r1 is proportional to q1 and inversely proportional to r1. If charge q is placed directly between two charges of 2.00nC and 1.00 nC that are separated by 10.0 mm, find the point at which the total potential energy (the sum due to the other two charges) of q is a minimum.

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