This Third Edition of the popular introduction to physics provides an accessible treatment of the subject appropriate to students from a variety of backgrounds. Presents new material based on recent developments, and includes over 50 new examples and nearly 300 new exercises and problems. Sections covering difficult topics have been rewritten for greater clarity. Includes many examples from the life sciences, chemical systems, and alternative energy sources. To illustrate physics in action, entire chapters are devoted to applications such as nerve conduction, ionizing radiation, and nuclear magnetic resonance. Text is comprehensive and flexible enough to accommodate various non--major students. Each chapter contains a checklist of terms, examples, exercises, and problems.