1. An electric iron connected to 120 V draws 9 A of current. Show that the amount of heat generated in 1 minute is nearly 65,000 J. 2. When combing your hair, you scuff electrons from your hair onto...

1. An electric iron connected to 120 V draws 9 A of current. Show that the amount of heat generated in 1 minute is nearly 65,000 J.

2. When combing your hair, you scuff electrons from your hair onto the comb. Is your hair then positively or negatively charged? How about the comb?