In the figure what are the (a) magnitude and
(b) direction (from x-axis in the
counterclockwise direction) of the net electrostatic force on
particle 4 due to the other three particles? All four particles are
fixed in the xy plane, and q1 = -30.40
× 10-19 C, q2 = +30.40 ×
10-19C, q3 = +60.80 ×
10-19 C, q4 = +30.40 ×
10-19 C, θ1 = 36o,
d1 = 3.90 cm, and d2 =
d3 = 3.30 cm.
10 19...