1. The problem statement, all variables and given/known data Point charge Q1 = 25nC located at P1(4,-2,7) and a charge Q2 = 60 nC be at P2(-3,4,-2). At what point on the y-axis is Ex=0? 2. Relevant equations E= [ Q / (4*pi*E0*r*r) ] ar 3. The attempt at a solution I took: ( Q1 / 4*pi*E0*(x*x+y*y+z*z) * (y / sqrt(x*x+y*y+z*z)) ay I got -6.51. The solution is -6.89. Am I way off base or on the right path? Thanks for your help.