IMPORTANT: When purchasing this instant access code for College Physics, ensure that you are using it in a College Physics course. Use with a different course may cause complications with access. WebAssign engages you with immediate feedback, rich tutorial content, and an interactive, fully customizable eBook, Cengage YouBook, helping you to develop a deeper conceptual understanding of the subject matter. This access code includes access to WebAssign and life-of-edition access to the eBook for the registered edition of that text. If you need to retake the course and your instructor is using the same book AND edition, then you will not need to buy a new code. This instant access code will be delivered via email when purchased. If you are not certain this is the correct access code for your course, please contact your instructor.