Using the data from Problems 67 and 68, find the approximate electric potential 1.5 m above the Earth’s surface (about eye level). Take the ground to be at V = 0.

Data From Problem 67

Experiments have shown that in good weather the Earth has, on average, a negative charge of approximately 10^-13 C on every square centimeter of surface area. What is the approximate total excess charge on the entire Earth? How many electrons does that correspond to? For simplicity, assume that charge is spread evenly over the entire surface of the Earth, including the oceans.