A student conducts an experiment to determine the unknown positive charge \(q\) on a small sphere, Sphere A. Sphere A has a mass \(m = 1.0 \text{ g}\) and is suspended from the ceiling by a lightweight, nonconducting string of length \(L\). A second small sphere, Sphere B, carries a known positive charge \(Q = +5.0 \times 10^{-8} \text{ C}\) and is mounted on an insulating stand. Sphere B is brought near Sphere A so that their centers are at the same horizontal height, separated by a distance \(r\). The repulsive electric force causes Sphere A to deflect from the vertical by an angle \(\theta\), as shown in Figure 1. The student assumes the spheres act as point charges.