Question

The electric force between two charged vinyl balloons is 3.0 × 10-3 newtons. If the distance between them is 6.0 × 10-^2 meters. If the charge of one vinyl balloon is 3.3 × 10-^8 coulombs what is the charge on the other vinyl balloon? (k = 9.0 × 10^9 newton·meter2/coulombs2)?
A. 3.3 × 10-8 coulombs
B. 3.6 × 10-6 coulombs
C. 4.8 × 10-8 coulombs
D. 6.0 × 10-8 coulombs
E. 3.3 × 10-3 coulombs

Answer 1

I get 3.6 x10-8 C, using
\[F = k \frac{ Q _{1} Q _{2} }{ r ^{2} }\]