- #1
Hypatio
- 151
- 1
I am trying to calculate coulombic potentials. The equation given in wikipedia is
[tex]F=k_e\frac{q_{1}q_{2}}{r^2}[/tex]
where k_e is in units of N m^2 C^-2, q are the partial charges, and r is the distance.
However, I look here and they give k_e=2.31*10^19 and remove the square of the distance. I assume that the difference is related to the units, which is in J*nm in this other resource, but if k_e is a constant then how can an equation of the form 1/r^2 give the same answer as one with the form 1/r?
Also, is the given value of k_e (2.31*10^19 J*nm) very accurate? What is the more accurate value?
[tex]F=k_e\frac{q_{1}q_{2}}{r^2}[/tex]
where k_e is in units of N m^2 C^-2, q are the partial charges, and r is the distance.
However, I look here and they give k_e=2.31*10^19 and remove the square of the distance. I assume that the difference is related to the units, which is in J*nm in this other resource, but if k_e is a constant then how can an equation of the form 1/r^2 give the same answer as one with the form 1/r?
Also, is the given value of k_e (2.31*10^19 J*nm) very accurate? What is the more accurate value?