There are two identical charges attached to the ends of a spring. How far apart are they if the system is in equilibrium (neglecting gravity)?

**System Parameters (All in SI units):**

Charge | Coulomb's constant | Spring constant | Spring unstretched length |

\(q = 10^{-4} C \) | \(k = 9\times10^9 \text{ Nm}^2 \text{ C}^{-2} \) | \(\alpha = 90\text{ Nm}^{-1} \) | \(L = 1\text{ m} \) |

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