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Two identical small, charged spheres, each having a mass of 30 g, hang in equilibrium as...

Two identical small, charged spheres, each having a mass of 30 g, hang in equilibrium as shown in the figure. The length Lof each string is 0.7 m, and the angle theta is 50. Find the magnitude of the charge on each sphere in (nC).(ke=9*109N.m2/C2)
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