Well, in order to find the answer you have to find your radius, which would be the km in the problem, but without r, you can't adequately solve the equation.
F=k*q1q2/r^2
F=(8.98755e9)(12*(-12)/r^2)
You will need to change r from km to m by multiplying it by 1000.
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Well, in order to find the answer you have to find your radius, which would be the km in the problem, but without r, you can't adequately solve the equation.
F=k*q1q2/r^2
F=(8.98755e9)(12*(-12)/r^2)
You will need to change r from km to m by multiplying it by 1000.
The answer will be positive by the way.