physics
posted by Sejul on .
in an experiment using Coulomb's apparatus, a sphere with a charge of 3.6 x 10^8 C is 1.4 cm from a second sphere of unknown charge. The force between the spheres is 2.7 x 10^2 N. What is the charge of the second sphere?
I get 1.3 x 10^4 C, but the answer is supposed to be 1.6 x 10^8. Any possibility the book has a misprint? Where did I go wrong?

F = k Q1 Q2/r^2
k = 9*10^9
2.7 * 10^2 = 9 * 10^9 * 3.6 * 10^8 Q2/.014^2
Q2 = 1.63 * 10^5 * 10^3
= 1.63*10^8 C