91 A. B. 92 Two small spheres carry charges q₁and 92 and are attached to two light strings, as shown. One end of each string is attached to a fixed point, while the other end is attached to one of the charges. q₁ is negatively charged and is placed a distance d directly above q2, which is positively charged. The mass of q₁ is m₁ and the mass of q2 is m2. ) If gravity acts on each sphere, what is the tension in the lower string? Express your answer in terms of the given variables k, 91, 92, m₁, m2, g, and d, as needed. What is the tension in the lower string if q₁ = -3.0 μC q2 +3.0 μC, m₁ = m₂ = 40.0 g. g = 9.80 m/s², and d = 15 cm.

91 A. B. 92 Two small spheres carry charges q₁and 92 and are attached to two light strings, as shown. One end of each string is attached to a fixed point, while the other end is attached to one of the charges. q₁ is negatively charged and is placed a distance d directly above q2, which is positively charged. The mass of q₁ is m₁ and the mass of q2 is m2. ) If gravity acts on each sphere, what is the tension in the lower string? Express your answer in terms of the given variables k, 91, 92, m₁, m2, g, and d, as needed. What is the tension in the lower string if q₁ = -3.0 μC q2 +3.0 μC, m₁ = m₂ = 40.0 g. g = 9.80 m/s², and d = 15 cm.