This book, available on the Google Books website, discusses the history of the concept of mass and its properties. Beginning with its humble foundations, it guides you through the philosophy, conceptualization, and...

This site, from UCLA's Department of Physics, contains web and in-class demonstrations of physics concepts in the topic areas of mechanics, harmonic motion and waves, electricity and magnetism, acoustics, optics, matter...

This is an English translation of the 1905 article by Albert Einstein that establishes the relation between the mass and energy of a particle. The article was published in the book The Principle of Relativity and...

This site by Charles and Ray Eames provides a series of multimedia resources that illustrate the scale of the universe. Visitors can view stills from the Charles and Ray Eames video "Powers of Ten," which zooms in and...

An idiosyncratic and personal selection of particularly important or particularly intriguing mathematical equations, not all of them complicated. Mathematical Constants; The definition of Pi; The definition of e; A...