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 and the charge of one vinyl balloon is 3.3 × 10-8 coulombs, what is the charge on the other vinyl balloon? (k = 9.0 × 109 newton·meter2/coulombs2)

3.3 × 10-8 coulombs

3.6 × 10-6 coulombs

4.8 × 10-8 coulombs

6.0 × 10-8 coulombs

3.3 × 10-3 coulombs

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 and the charge of one vinyl balloon is 3.3 × 10-8 coulombs, what is the charge on the other vinyl balloon? (k = 9.0 × 109 newton·meter2/coulombs2)

3.3 × 10-8 coulombs

3.6 × 10-6 coulombs

4.8 × 10-8 coulombs

6.0 × 10-8 coulombs

3.3 × 10-3 coulombs

gebooors · Answer

q2 = F r^2 / k q1

anonymous · Answer

I tried to work it out using the formula you provided and i got 3.96^-23 
[(6x10^-2)^2/ (9x10^9)(3.3x10^-8)] (3x10^-3)