The frequency of a sound wave is 457 Hz. What is the period? a
0.0032 s
b 0.078 s
C 0.0010 s
d 0.0022 s

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.