Answer to Question #298079 in Electricity and Magnetism for greg

Question

compute the force of attraction between a. +1.60 × 10-19 c charge and a -2.09 × 10-18 c charge if they are 4.01 × 10-10m apart

Answer 1

$F=\frac{kq_1|q_2|}{r^2}=18.7~nN.$