1. The problem statement, all variables and given/known data Near the surface of the Earth there is an electric field with a magnitude of about 92 N/C directed vertically down. Assume this field is caused by a net free charge on the Earth. (a) What are the magnitude and sign of the charge on the total Earth that produces this field? 2. Relevant equations I tried using mearth g / E but this not appear to yield the correct answer. 3. The attempt at a solution mg / E (5.9736 x 1024 * -10) / 92 -6.49 x 1023 C Thanks for the help!