Sometimes, class flows very smoothly; sometimes it doesn't
Sometimes, class flows very smoothly. In the early session of Energy Systems Laboratory today, I laid out a method for accounting hydrogen mass flow rate as a function of current and a basis for using the ratio of Gibbs free energy change to enthalpy change as efficiency. I did the same thing in the later class. The differences between the two were in class responsiveness and level of enthusiasm. The first class participated; the last class rolled over and played dead. I have more fun and find the teaching to be easier if the class participates.