one student have asked me about the deleted parts of chapters 13 & 23. You should have the powerpoint slides, so the deleted slides from the two chapters are: (pass this information to non-aris students) chapter 13: The deleted slides are: 7,8,12-14,16,19,26-34,37-40. Chapter 23: The deleted slides are: 9-11,14,18-23,25-29. Batteries are deleted