# Forces between particles at a distance. Can someone please check this?

1. Oct 14, 2014

### kirsten_2009

1. The problem statement, all variables and given/known data

How does the electric force between two hydrogen nuclei placed a certain distance apart compare with the force between two helium nuclei placed twice as far apart?

2. Relevant equations

F= k * q1 x q2 / d^2

3. The attempt at a solution

The force would actually be the same between the hydrogen nuclei and the helium nuclei because although the charge on the helium nuclei is double that of hydrogen (2), the distance between them is also doubled; cancelling out any effect the increased charge could have on the force because force is proportional to the charge of the particles by the distance between them squared.

2. Oct 14, 2014

### collinsmark

Yes, that's right. But I suggest writing the results out in equation form (and comparing them), just to be clear of ambiguity.

3. Oct 14, 2014

### kirsten_2009

O.k...sounds good. Thank you so much!