The current in a hair dryer measures 15.0 amps. the resistance of the hair dryer is 8 ohms. what is the voltage?
a. 120 v
b. 0.5 v
c. 7 v
d. 1800 v

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.