We have two charged particles, one with a charge of +1.00 nC and the other with a charge of -1.00 nC. (nano means 10-9). The positive charge is fixed in place - it can't move. At a place some distance x from the positive charge, the electric potential because of that charge only is +17.0 V. Calculate x. _______ m. The negative charge, which has a mass of 1.00 \times 10^{-11} \; kg , is placed at the point where the positive charge creates a potential of +17.0 V. The negative charge is given an initial velocity directly away from the positive charge - the farthest it gets from the positive charge is a place where the positive charge creates a potential of +10.0 V. Calculate the initial speed of the negative charge. _______ m/s. The negative charge reverses direction, and starts heading back toward the positive charge. At some point, the negative charge has a speed of 68.0 m/s. Calculate the electric potential the positive charge creates at that point. _______ V