Two point charges q1 = 4.0 ?C and q2 = -8.0 ?C are placed along the x-axis at x1 = 0 m and x2 = 0.20 m, respectively. What is the electric potential energy of this system of charges?
A) +1.4 J
B) -1.4 J
C) -32 J
D) 4.0 J
E) -4.0 J
B
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