The main objectives of this introductory physics book are twofold: to provide the student with a clear and logical presentation of the basic concepts and principles of physics, and to strengthen an understanding of the concepts and principles through a broad range of interesting applications to the real world. In order to meet these objectives, emphasis is placed on sound physical arguments and discussions of everyday experiences and observations. At the same time, the student is motivated through practical examples that demonstrate the role of physics in other disciplines. This sixth edition features new pedagogy in keeping with the findings of physics education research. The rich, new pedagogy has been integrated within the framework of an established and reliable text, facilitating its use by instructors. This text, which covers the standard topics in classical physics and 20th century physics, is divided into six parts. Newtonian mechanics and the physics of fluids (Part I); heat and thermodynamics (Part II); wave motion and sound (Part III); electricity and magnetism (Part IV); properties of light and the field of geometric and wave optics (Part V); and an introduction to special relativity, quantum physics, and atomic and nuclear physics (Part VI).