R Rachel K New member Jul 31, 2010 #1 A hair dryer operates on 120 volts, draws a current of 7.5, and has a power rating of 900 watts. How long was the hair dryer running if it used 54 000 joules of energy?
A hair dryer operates on 120 volts, draws a current of 7.5, and has a power rating of 900 watts. How long was the hair dryer running if it used 54 000 joules of energy?
