``Relativity'' as the concluding chapter of the regular version, and ``Particles and the Cosmos'' as the concluding chapter of the extended version. New also are 16 essays, distributed throughout the text, on applications of physics to ``real world'' topics of student interest. Each essay is self-contained and is written by an expert in the topic. The body of the text contains more help in problem-solving and the chapter sections are shorter, making the material more accessible. There are more photos and diagrams than before, including attention-getting chapter-head photos and captions. The number of worked examples has been increased, as has the number of questions, exercises, and problems. In addition, a thread of ideas from relativistic and quantum physics is weaved through the earlier chapters, preparing the way for the later chapters.

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