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## Homework Statement

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.

## Homework Equations

q=F/E

F=kq1q1/r^2

E=kq/r^2

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:

0=(8.99x10^9)(x)/(0.8)^2

i think i just need a push in the right direction