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เนื้อหาย่อ : In writing this fifth edition of Physics for Scientists and Engineers, we har major effort to improve the clarity of presentation and to include new pedagogical res that help support the learning and teaching processes. Drawin feedback from users of the fourth edition and reviewers' syggestion made refinements in order to better meet the needs of students and teachers. We have also streamlined the supplements package, which now includes a CD-ROM con- taining student tutorials and interactive problem-solving software, as well as offerings on the World Wide Web. is textbook is intended for a course in introductory physics for stude ing in science or engineering. The entire contents of the text could be covered in a three-semester course, but it is possible to use the material in shorter sequences with the omission of selected chapters and sections. The mathematical background of the student taking this course should ideally include one semester of calculus. If that is not possible, the student should be enrolled in a concurrent course in introductory calculus. OBJECTIVES This introductory physics textbook has two main objectives: 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. To meet these objectives, we have ced emphasis on sound physical arguments and problem-solving metho the same time, we have attempted to motivate the student through practical examples that demonstrate the role of physics in other disciplines, including engineering, chemistry, and medicine. CHANGES IN THE FIFTH EDITION A large number of changes and improvements have been made in preparing the fifth n of this text. Some of the new features are based on our experien rent trends in science education. Other changes have been incorp response to comments and suggestions offered by users of the fourth edition and by reviewers of the manuscript. The following represent the major changes in the fifth edition: Improved Illustrations ㆍ Time-sequenced events are represented by circled letters in selected mechanics illustrations. For example, Figure 2.1b (see page 25) shows such letters at the appropriate places on a position-time graph. This construction helps students "translate" the observed motion into its graphical representation.