Q +5Q +4Q -3Q L Use k = 9.0 x 109 N m2 / C2. Four charged balls are arranged so that there is one ball at each of the four corners of a square, as shown above. Part (a) Homework . Unanswered . Use these numbers: L = 12.0 cm, and Q = 16.0 nC (nanocoulombs). Calculate the magnitude of the net force exerted on the -Q charge by the other three charged balls. N Type your numeric answer and submit Unanswered . 5 attempts left Submit Part (b) Homework . Unanswered . Calculate the magnitude of the net electric field at the center of the square, because of the four charged balls. N/C Type your numeric answer and submit Unanswered . 5 attempts left Submit-3q -3q -3q -3q -29 +9 -29 +9 Case A Case B Case C Case D Part (b) Homework . Answered . Use q = 4.80 x 10 C, and L = 20.0 cm, as well as k = 9.00 x 109 N m2/C2. In Case C, calculate the magnitude of the net electrostatic force acting on the ball of charge -3q. N Type your numeric answer and submit Cannot be empty Answered - Incorrect . 4 attempts left Resubmit Part (c) Homework . Answered . Use q = 4.80 x 10- C, and L = 20.0 cm, as well as k = 9.00 x 109 N m2/C2. In Case D, calculate the magnitude of the net electrostatic force acting on the ball of charge -3q. "Open in Reading