Charging by Contact 9. What will happen when two identical metal balls in the diagram contact each other? \\Q 18. The reason a charged balloon will stick to a wall is that a) electrons transfer back and forth between the wall and the balloon. bj induced opposite charges in the wall are closer than other wall charges. c) the rubber of the balloon simply sticks to walls. d) the charge is slightly sticky and acts like glue. e) none of the above Application of Coulomb's Law 20. A 3-C charge and a 2-C charge attract each other with 5 N of force. How much will a 4-C charge and a 6-C charge attract each other when placed the same distance apart? a. 5 N b. 12 N c. ION e. 40 N d. 20 N f. none of the above