I really need help, and I'd greatly appreciate it. "Two point charges of +10nC and -20nC lie on the x-axis at points x=0 and x=+10m, respectavly. Find the point where the net electric feild is zero, if such a point exists." The teacher gave us the answer 24m, and I just can't see how!!! You help is REALLY APPRECIATED, I have been on this one forver it seems... I keep getting 20m?