A small positive test charge of 0.02C is situated 1.5m away from a positive charge of 1C and 4.2m away from a second positive charge of 14C. What is the total potential energy of the test charge. The coulomb constant K = 9E9. Give your answer in GigaJoules (GJ)

4 charges, each 2 nC worth of charge, are arranged on the 4 corners of a square. The side length of the square is 1 meter. What is the electric potential in the center?

m7df7 > $ 4 R F An isolated charged soap bubble of radius Ro= 5.25 cm has a potential of Vo = 231.0 V at its surface. If the bubble shrinks to a radius that is 27.0% of the initial radius, by how much AU does its electrostatic potential energy change? ▬▬ V Assume that the charge on the bubble is spread evenly over the surface, and that the total charge on the bubble remains constant. Use k = 8.99 x 10° N-m²/C² for the Coulomb force constant. Q Search % 5 FS T G O D A 6 B Y H & 7 N U 8 M 9 K DE O (DOLL prt sc AU = home B B 0 P ? end num lock 7 Po 4 1 CE 11:00 PM 2/18/20244 8 J 5 +/- O 2 9 PRE 3

9. An electron has been placed at the origin. The grid spacing is 1 Angstrom per small square this time. Now you have a nucleus with 12 protons at x = 4.0 Angstroms on the x-axis. What is the value of the electrostatic potential V at a point on the positive y-axis, at y = 7.1 Angstroms?     21.2 V     11.5 V     19.2 V     -2.0 V