This essential text is a cornerstone of modern physics. From the principles of motion to the laws of thermodynamics, French's clear and concise explanations make even the most complex topics accessible to readers of all levels. Whether you are a student of physics, a professional scientist, or simply a curious reader, this book is an indispensable guide to the fundamental principles underlying the workings of the universe. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.