this class is similar to class 16 in 2013;
audio only is
www.physics.csbsju.edu/341/2013/lectures/16.m4a
with the overhead pdf being
www.physics.csbsju.edu/341/2013/lectures/16.pdf

In general 2013/lectures will have a lecture (audio+pdf)
similar to what we're doing



24 M Mar 16 current_sheet.pdf  https://youtu.be/qpqj3OhQmmQ https://youtu.be/OVTfTLEEOuE