max speed --> electron 1. An electron starts from rest 15.0 cm from the center of a uniformly charged insulating sphere of radius 10.0 cm and total negative charge -3.00 μC.What is the maximum speed (in m/s) the electron can reach after releasing it? (Note: Assume a reference level of the potential V = 0 at r = ∞) 2. Relevant equations ke = 8.99e9 Nm^2/C^2 k = 1/2 mv^2 E = k*Q/r^2 e = - 1.6e-19 C me = 9.11e-31 kg 3. The attempt at a solution I can't figure out what my Q will be in this problem, because I believe Q refers to the total charge of the sphere, not total negative charge of the sphere. Please help, thank you!