Three identical small Styrofoam balls $(m=2\mathrm{.}18g)$ are suspended from a fixed point by three nonconducting threads, each with a length of $50\mathrm{.}7cm$ and with negligible mass. At equilibrium the

three balls form an equilateral triangle with sides of $29\mathrm{.}8cm.$ What is the common charge $q$ carried by each ball? ${3\mathrm{.}49}^{**}{10}^{{?}^{{?}^{?}}}-7C$

$.$ Tries $\frac{1}{11}$Three point charges, $q_1=-3\mathrm{.}95nC,q_2=4\mathrm{.}72nC$ and $q_3=3\mathrm{.}26nC$ are aligned along the $x$ axis as shown in the figure below. Assume that $L_1=0\mathrm{.}511m$ and $L_2=0\mathrm{.}807m.$

Calculate the electric field at the position $(2\mathrm{.}02m,0)\mathrm{.}2\mathrm{.}48{10}^1\frac{N}{C}$

$!$

$158-8372(?)$

Calculate the magnitude of the electric field at the position $(0,2\mathrm{.}02m).$

$$ Tries$\frac{7}{10}$

Calculate the angle of the electric field with respect to the positive $x-$axis at this position $(0,2\mathrm{.}02).$

Tries $2/10$