Consider the two small, equal$-$mass, charged spheres shown in the figure. The top sphere is suspended from the ceiling by a string, and has a charge of

q$1=30\mathrm{.}5$ nC$.$

The bottom sphere has a charge of

q$2=58\mathrm{.}0$ nC$,$

and is directly below the top sphere. Assume

d $=2\mathrm{.}00$ cm

and

m $=6\mathrm{.}50$ g$.$