Yea, those lectures are the best. I don't know, I can probably find the charge on some website, but then, I would still have to find F. So would I then be able to use Coulomb's Law to find the force using the two known charges?
In many equations, I see the term E, but I'm really confused on how exactly I can calculate this value. So if I were to an experiment and I needed to find the polarization density, and I needed the E value, where can I find it?
Thanks :D