Students can buy one volume without necessarily having to buy the other.
Chapter-opening Puzzlers pose an interesting query relevant to the chapter, the answer is readily apparent after reading the text material. Most chapters feature one to three QuickLabs within the margin. These are simple physics demonstrations students can do at home or in the dorm, using common, everyday materials. New conceptual examples have been added, called Thinking Physics and Applying Physics. Thinking Physics challenges the student to think through the principles, rather than just plugging numbers into equations.