An unknown charge and a charge of 60 nC are 2.0m apart. The electric field strength is zero at a point 0.80m from the unknown charge on a line connecting the two charges. Find the magnitutde of the unknown charge.
Coulomb constant: 8.99 x10^9
The Attempt at a Solution
I tried making an equation with the info given, but it doesn't seem like it's gonna help me:
i think i just need a push in the right direction