7. A single neutral 2.00 g pithball is touched by a charged rubber rod which had a o ling stand charge of 2.30 x 10 C. The pithball then comes into contact with another pithball of equal size and shape. If the two pithballs are hung by two pieces of 3.00 cm g\\ 25 thread from a single point (as shown) forming an angle of 15.0, what is the charge _5 \\ & remaining on the original charged rod? o 150y :'lln'ln"- 8. A proton, electron and alpha particle are arranged as shown above. Using your data table and the diagram given, determine the magnitude and direction of the electric force acting on the proton due to the alpha particle and the @ electron. F