Choose the correct answer after you work the problem.
1.9 N
2.0 x 10 ^ -9 N
2 x 10 ^ -9 N
8 x 10 ^ -9 N
4.0 x 10 ^ -1 N
3.21 x 10 ^ -44 N
2.7 x 10 ^ -11 N
3.2 x 10 ^ -44 N