We have that the Magnitude of the second charge is
[tex]q_2=2.5*10^{-8}C[/tex]
From the question we are told
A 1.0-c point charge is 15 m from a second point charge, and the electric force on one of them due to the other is 1.0 n. what is the magnitude of the second charge
Generally the equation for the electric force is mathematically given as
[tex]E=\frac{Ke*q1*q2)}{r^2}[/tex]
Therefore
[tex]q_2 = \frac{F*r^2}{Ke*q1}\\\\q_2 = \frac{1*15^2}{8.9e*9}[/tex]
[tex]q_2=2.5*10^{-8}C[/tex]
Therefore
The Magnitude of the second charge is
[tex]q_2=2.5*10^{-8}C[/tex]
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