19. The diagram shows a measuring cylinder. 100 .90 80 70 60 50 -40 -30 -20 10 Which unit would be most suitable for its scale? A mm2 B mm Ccm2 D cm3​

Four objects each with charge +2.0×10−7c are located at the corners of a square whose sides are 2.0 m long. part a what quantities can be determined using this information? check all that apply. the electric force on a charged object placed at the center of the square. the mass of each object. the total electric potential energy of the system consisting of the four charged objects. part b find the electric force on a charged object placed at the center of the square.