Answers to even numbered “suggested problems” for homework #1 - #3; answers to odd numbered problems are in the back of your textbook.
18.14 (a) 1.44 x 10^4 N, an attractive force; (b) 3.24 x 10^3 N, a repulsive force
18.16 +2.0 micro-C
19.14 +45 V, point B is at higher potential
20.2 (a) 0.036 C; (b) 2.3 x 10^17 electrons
20.24 5 million dollars
20.40 9.0 V
20.48 446 ohms
20.86 (a) 12.0 microFarads; (b) 0.00030 C
20.102 3.5 x 10^4 A