Earth has an excess of 6.0×10^5 electrons on each square centimeter of surface. Estimate the electric charge of Earth in coulombs. Consider that the radius of Earth is 6400 km.
Work for this Q:
Q= (6.0x10^5)(-1.60x10^-19)
Q= -9.6x10^-14
But this isn't the right answer in the textbook.