What is the force between two small charged spheres having charges of `2 xx 10^(-7)C and 3 xx 10^(-7)C` placed 30 cm apart in air?

Explanation

`q_(1)=2 xx 10^(-7)C =3 xx 10^(-7)C, r=30cm=30 xx 10^(-2)m`
`F=9 xx 10^(9) xx (q_(1)q_(2))/(r^(2))=9 xx 10^(9) xx (2 xx 10^(-7) xx 3 xx 10^(-7))/((30 xx 10^(-2))^(2)) =0.06 xx 10^(-1)N =6 xx 10^(-3)N ("repulsive")`