Equations du Jour is provided for the benefit of all students throughout the world. Those who discover them online are welcome to use and peruse them online or via a download copy for the purpose of teaching or learning physics on an individual basis. However, they may not be redistributed in any form (paper or electronic) and must be used with attribution in any class. Distribute the link, folks, not the actual content!

I'm in the process (slow as it is) of redoing these notes as Latex sourced and even prettier -- see my Introductory Physics 2 link, and they in turn will be published as a regular (but very inexpensive) textbook in physics that perhaps can stand in for some of the horribly expensive textbooks that are currently available. In the meantime, enjoy the free use of these notes to help support your learning of physics.

I cherish feedback and corrections from readers and users of all my online teaching and learning resources, feel free to send me mail at (obfuscated) rgb at phy dot duke dot edu.