\begin{problem*}{23.59}
A charged cork ball of mass $1.00\U{g}$ is suspended on a light string
-in the presence of a uniform electric field as shown in Figure P23.59.
+in the presence of a uniform electric field as shown in Figure~P23.59.
When $\vect{E}=(3.00\ihat+5.00\jhat)\E{5}\U{N/C}$, the ball is in
equilibrium at $\theta=37.0\dg$. Find \Part{a} the charge on the ball
and \Part{b} the tension in the string.