Two tiny spheres of mass m3 = 4.85 mg carry charges of equal magnitude, Iqsl = 80.00 716', but opposite sign. They are tied to the same ceiling hook by light strings of length 0.515 m. A horizontal uniform electric field that is directed to the right is slowly turned on, the spheres hang at rest with the angle BE = 30.0. (a) Which ball (the one on the left or the one on the right) has positive charge? (b) What is the magnitude E of the field? '6; is -+ E