Less on machines on more on basic concepts, may I recommend a physics site that is spiritually related to this website, in that it is also clear, simple, and in

Less on machines on more on basic concepts, may I recommend a physics site that is spiritually related to this website, in that it is also clear, simple, and in many ways a work of passion for teaching? http://hyperphysics.phy-astr.gsu.edu/hbase/emcon.html#emcon http://hyperphysics.phy-astr.gsu.edu/hbase/emcon.html#emcon