by Nguyen D L•
Thank you so much Professor Hafner,
Your physics demo give me deeper insight into Electric Field. I am sure other student would learn and love your class. I am more confident to tutor my son in Electricity portion of E&M now.
by yonthan a•
it provides a deep understanding of electricity helped by many logical models... wow!
by Muhammad E•
on of the best tutor i learned from him alot of simplicity in explanation the idea ♥
by David W•
Too many mistakes in the problems.