Calculating Electrostatic Repulsion in Nuclear Fission

[snash1057]

Homework Statement

At the point of fission, a nucleus with 98 protons is divided into two smaller spheres, each with 49 protons and a radius of 6.38x10^-15 m. What is the repulsive force pushing these two spheres apart

Hint: d ≠ the radius

Homework Equations

F= k (q1q2/d^2)

The Attempt at a Solution

if the radius isn't d then i don't know what is. i have tried multiplying the radius by 2 because there are now 2 spheres and setting it up like

F= 9E9 (49 x 1.6E-19/4.76E-29^2) but that is incorrect

 

[Doc Al]

i have tried multiplying the radius by 2 because there are now 2 spheres

Makes sense to me.

and setting it up like

F= 9E9 (49 x 1.6E-19/4.76E-29^2) but that is incorrect

Redo this more carefully.