okay, I re-set up the equations to look like
[(9x10^9)(3.1x10^-9)(q2)]/.1^2=(9x10^9)(q1)(q2)/.2^2
And I know that I have to solve for q1, but I don't understand how I am supposed to do that without the value for q2. How do I solve for q2 or is there something I'm not seeing where I don't have...
q1___________Q___________q2
10cm 10cm
In the figure above the charge in the middle is Q=-3.1nC. For what charge q1 will charge q2 be in static equilibrium?
Relevant equations
I think that F=kq1q2/r^2 is relevant
my attempt at a solution
Since the ions are...