Gravity Is Available Now On iBook Store!


  Gravity has been on the iBook Store for a few months now, but still has not been put on the physics page.  I have no idea what they do or how they do things at the iBook Store, but it’s there in the system if you do a search.  You can also follow this […]

New Book Coming! Gravity


I’m moving fast with the new book “Gravity”! I’m starting with newtonian gravity, some Kepler’s Laws, and some other fun subjects.  There will be some more modern gravitational theory such as space-time curvature and gravitational lensing in there, but only at a basic level.  My new plan is  to put out short booklets of 30-50 […]

New Pages Completed In The Gravity Section


Hubble’s Law

Hubble's Law by Tony Farley

If you have read The Electric Force, you know that I like to have a section in each unit about a relevant scientist.  For my velocity unit, I chose to do a section about Edwin Hubble.  Hubble was so important to our understanding of the size and dynamics of the universe.  Here is the first […]