A charge of +4.13 * 10-19 coulombs is placed 8.03 * 10-7 meters apart from another charge of -3.37 * 10-17 coulombs. What is the force of attraction between the charged particles? Now we know there's a form of attraction because they have opposite signs. One's positive, one's negative. In chemistry, opposites attract.
So, potential energy equals our permittivity constant, which is 9.0 * 109 Newtons times meters squared over Coulomb squared. That's going to multiply with the two charges Q1 and Q2. And then we have our radius squared. When you do this, notice what's going to cancel out? Our meter squares cancel out and our Coulomb squares cancel out.
We'll have our answer in Newtons, which comes out to -1.94 * 10-13 Newtons. So this would be the attraction felt between the two charged particles.