(From the Preface) This is primarily a textbook for a one-semester liberal arts physics course at the college level; however, it could also serve as the basic text, accompanied by supplemental reading, for a more leisurely one-year course. This book is a shortened and less mathematical version of the author's Fundamental Laws of Physics, with less space devoted to classical mechanics and electromagnetism and more to the recent concepts of atomic and nuclear physics, elementary particles, symmetry and conservation principles, and the basic forces of nature.