A red blood cell contains4.710⁷free electrons. What is the total charge of these electrons in the red blood cell? How far apart (in mm) must two point charges of 70.0 nC (typical of static electricity) be to have a force of 9.50 N between them?

A test charge of +2 C is placed halfway between a charge of +6 C and another of +3 C separated by 18 cm.(a)What is the magnitude of the force (in N) on the test charge