A50 mg point particle with a charge of +6 nc is resting on the bottom of two parallel plates. calculate the particle's 2. acceleration if the plates are suddenly given a surface charge density of 7x10-scrn-2. assume the plates to be infiinite and the bottom plate recieves the positive charge. consider two identical charged balls hanging from the ceiling by strings of equal length 1.1 m (in equilibrium). each ball has a charge of q = 34 c. the balls hang at an angle 0 22° with respect to the vertical. what 3. f6 18 f9 10 f11 612 pouse 帐