This ninth edition of Barrons SAT Subject Test Physics reflects changes that have taken place in both the examination and the curriculum since the release of the eighth edition. 　　The book begins with an introduction，which sets the stage for your review.In it.you will learn about the structure of the SAT subject test in physics，methods for solving physics problems.and some general Information about the scoring of the test.This introduction iS followed by a diagnostic test(with full answers and explanations)that you can use as a reliminary assessment.After taking this diagnostic test，refer to the appropriate review chapters for additional information.The remainder of the book contains an extensive review of the material covered in a typical high school physics class.Chal-lenging questions are identified with the icon.You may need to use a calculator fot some of these questions.However，you may NOT use a calcu-lator for the practice tests or the actual SAT subject test. 　　Additional practice tests，with answers and explanations，are provided.These practice tests are comparable to the actual test.The appendices at the back of the book assist your review by discussing background math skills as well as providing useful charts，formulas，and tables.There is also a glossary of physics-related terms. 　　It iS both an honor and a pleasure to assist in the preparation of this latest edition.and I would like to thank several people.Linda Turner，Senior Editor at Barrons.has always been helpful to me with her guidance for all of my projects.My colleagues Bob Draper，Pat Jablonowski，and Joe Vaughan have been generous with their constant encouragement and professional advice inregard to both content and pedagogy.Finally，I thank my wife，Karen，as well as my daughters.Marissa and Ilana，for their understanding，love，and support. 　　 　　本书为英文版。