ROADRUNNER OPTIONS

Consider the Specific circumstance of a favourable place cost q in the origin. To work out the probable a result of q at a length r with the origin relative into a reference of 0 at infinity (remember that we did a similar for probable Vitality), Enable (P = r) and (R = infty), with (dvec l = dvec r = hat r dr) and use (vec E = frac kq r^two hat r