# Electrostatic Force

1. Jan 20, 2008

[SOLVED] Electrostatic Force

1. The problem statement, all variables and given/known data
One model of the structure of the hydrogen atom consists of a stationary proton with an electron moving in a circular path around it.The orbital path has a radius of 5.3x10^-11m. The masses of a proton and an electron are 1.67x10^-27kg and 9.1x10^-31kg, respectively. Calculate the electrostatic force between the electron and the proton.

2. Relevant equations
F=kq1q2/r^2

3. The attempt at a solution
I looked at the question but I really didn't know where to start since none of the qs (charges) where given. I looked at the solution and I found that they used 1.6x10^-19C as the charges, so the equation subbed in looked like this: k(1.6x10^-19C)^2/r^2.
I don't understand where or how they got 1.6x10^-19C. Any help will be appreciated!

2. Jan 20, 2008

### hage567

-1.6x10^-19 C is the charge of one electron and is a constant. The charge on a proton is +1.6x10^-19 C.

3. Jan 20, 2008