pdf: http://www.ipt.ntnu.no/~stanko/files/Courses/TPG4230/2020/Lecture_notes/20200417.pdf
video: http://www.ipt.ntnu.no/~stanko/files/Courses/TPG4230/2020/Videos/20200417_1.mp4

ERRATA

52:19 There is an error when defining pump head, it should be divided by gravitational acceleration also.