Here's the homework problem I'm having trouble with: A solid metal sphere of radius .4 m carries a net charge of .190nC. Find the magnitude of the electric field at a point .130 m outside the surface of the sphere. I used the equation EA=q/Epsilon_0 E(4*pi)(r^2)=q/Epsilon_0 E(4*pi)(.130+.4)^2=(.190E-9)/(8.854E-12) E on the right hand side of equation is used to denote scientific notation. Solving for the electric field I get 75.748 N/C. Am I doing this correctly? Any feedback would be appreciated!