Two particles, with charges of 20.0 nC and -20.0 nC, are located at the points with coordinates (0, 4.00 cm) and (0, -4.00 cm), as shown in the figure below. A third particle with charge 40.0 nC is located at the point (5.00 cm, 0).
Determine the electrical potential at the origin (0,0) due to the three fixed charges (40.0 nC, 20.0 nC, and -20.0 nC).
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