- #1

axgalloway

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## Homework Statement

Two 2.0-cm-diameter insulating spheres have a 6.50 cm space between them. One sphere is charged to + 89.0 nC, the other to - 95.0 nC.

What is the electric field strength at the midpoint between the two spheres?

## Homework Equations

Esphere = KQ/r^2

k = 8.99 * 10^9

## The Attempt at a Solution

Esphere1 + Esphere2 = Etotal

(k*89*10^-9) / (3.25*10^-2)^2 + (k*95*10^-9) / (3.25*10^-2)^2

= Wrong answer: 1.57*10^6 N/C