Potential, V,

$\overline{){\mathbf{V}}{\mathbf{=}}\frac{\mathbf{k}\mathbf{q}}{\mathbf{r}}}$

q_{1} = - 3.0 × 10^{-9} C

q_{2} = 4.0 × 10^{-9} C

r_{1} = (y^{2} + (9cm)^{2})^{0.5}

r_{2} = (y^{2} + (15cm)^{2})^{0.5}

At the given point on the y-axis, the net potential is zero.

A -3.0 nC charge is on the x-axis at x = -9 cm and a +4.0 nC charge is on the x-axis at x = 15 cm. At what point or points on the y-axis is the electric potential zero?

y = _____ cm

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