26. The diagram below represents information that can be found on the periodic table for the element helium. A.
4.003
3,4
C.
B. He
24D.
The atomic mass of a helium atom is indicated by the arrow at:
a. A
d. D
b. B
e. He
c. С

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.