(1) Two small metallic spheres, each of mass m = 0.186 g, are suspended as pendu

Question

(1) Two small metallic spheres, each of mass m = 0.186 g, are suspended as pendulums by light strings of length L as shown in the figure below. The spheres are given the same electric charge of 7.7 nC, and they come to equilibrium when each string is at an angle of = 4.55° with the vertical. How long are the strings? [m]

https://www.webassign.net/serpse8/23-p-010.gif

(2) In the figure below, determine the point (other than infinity) at which the electric field is zero. (Let q1 = -1.60 µC and q2 = 7.00 µC.) [m]

https://www.webassign.net/serpse8/23-p-021-alt.gif

I really need help with these 2 questions! Just need a final answer, little explanation required but please include the numerical work so I can understand and also please follow the units in the [brackets]

Explanation / Answer

There are three forces acting on each sphere:

1) The tensi

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