The drawing shows an equilateral triangle, each side of which has a length of 2.03 cm. Point charges are fixed to each corner, as shown. The 4.00 UC charge experiences a net force due to the charges qA and qB. This net force points vertically downward and has a magnitude of 780 N. Determine (a) charge qA, (b) charge qB. +4.00 MC 4A 9B (a) Number i Units (b) Number i UnitsTwo particles with charges +8e and -4e are initially very far apart (effectively an infinite distance apart). They are then fixed at positions that are 6.84 x 10-10 m apart. What is EPEfinal - EPEinitial, which is the change in the electric potential energy? Number UnitsA moving particle encounters an external electric eld that decreases its kinetic energy from 9050 eV to 6550 eV as the particle moves from position A to position 8. The electric potential at A is 49.0 V, and that at B is +290 V. Determine the charge of the particle. Include the algebraic sign (+ or ,) with your answer. Higher polenlial Lower potential it Pl, '1 +._ A 5 Number n Units v