Any help is greatly appreciated. Thanks :)
1) The charge on a single electron or proton is
a) 1.6 x 10^-19 b) 6.25 x 10^18 c) 1.6 x 10^-18 d) 9.0 x 10^9
2) If the charge on each of two objects is doubled, the electric force changes by
a) 2 b) ½ c) 4 d) ¼
3) If two charged objects are moved...