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## Homework Statement

Two identical small spheres of mass 2.0 g are fastened to the ends of an insulating

thread of length 0.60 m. The spheres are suspended by a hook in the ceiling from

the centre of the thread. The spheres are given identical electric charges and hang

in static equilibrium, with an angle of 30.0° between the string halves. Calculate the magnitude of the charge on each sphere.

## Homework Equations

FE = kq1q2/r

^{2}

F2 = F1 (q a2/ q a1) (q b2 / q b1) (r1/r2)

^{2}

k = 9.0 x 10

^{9}Nm

^{2}/C

^{2}

## The Attempt at a Solution

So we have to find the q. I believe it should be the same since same mass, same angle from the normal line, 15 degrees and they have the same length, 0.6m. So if it is possible to find one of them, it is possible to find the other.

If I figure out something else for it, I will post/update this post, thanks for the help.

The final answer should be: 1.2 x 10

^{-7}C

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