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(21-20) Two small charged spheres hang from cords of equal length l as shown in Fig. 21-55 and make
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(21-20) Two small charged spheres hang from cords of equal length l as shown in Fig. 21-55 and make small angles θ_1 and θ_2 with the vertical, (a) If Q_1=Q, Q_2=2Q, and m_1=m_2=m, determine the ratio θ_1/θ_2 (b) If Q_1=Q, Q_2=2Q, m_1=m, and m_2=2m, determine the ratio θ_1/θ_2. (c) Estimate the distance between the spheres for each case.
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