8:28

Solution: a circuit problem (1)

4:42

A circuit problem (1)

33:13

Series lesson 1 revised

9:23

Calculus lesson 4 review exercises

1:03:29

Tutorial Mechanical Vibrations 2 & 3 Degree of Freedom Systems

4:24

Part 2 , a circuit problem

9:15

Discussion zeroes of polynomials

10:43

So I am; so am I. Discussion: sentence correction