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Three charges are arranged so that each is at the vertex of a 3-4-5 right triangle....

Three charges are arranged so that each is at the vertex of a 3-4-5 right triangle. the charge opposite the short side is Q1 = -11 nC. The charge opposite the long side is Q2 = 5 nC. The charge opposite the hypotenuse is Q3 = 16 nC. The hypotenuse is H = 0.45.
1) What is the magnitude of the electric force on Q3 due to Q1? Q3 due to Q2? Q3 due to Q1 and Q2?
2) What is the angle between the total electric force on Q3 due to Q1 and Q2 and the long side measured clockwise from the long side?

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