1. The problem statement, all variables and given/known data A nonconducting solid sphere of radius R has a volume charge density that is proportional to the distance from the center. That is rho=Ar for r is less than/equal to , A is a constant. Find the total charge on the sphere. 2. Relevant equations 3. The attempt at a solution rho=Ar=Q/V Q=Ar(4/3)*pi*R^3 Is that it?