1. The problem statement, all variables and given/known data A metal sphere with a diameter of 10 cm has a charge distribution of 1.09085 x 1018 electrons/cm2 on its surface. What is the electric field strength at a distance of 25 cm from the surface of the sphere? (Answer: 5.5 x 1012 N/C) 2. Relevant equations I wasn't given any equations. Only ones I know are E= F/q= (kqQ/r2)/q E= k x Q/r2 3. The attempt at a solution E= (k x Q)/r2= 9.0 x 109 x Q/ 25 cm2= ?