Learners compare animations of analog and digital data signals. A short quiz completes the activity.

Learners examine the differences and similarities between hydraulic and pneumatic systems.

Learners read about the similarities of electronic and hydraulic components and then match the schematic symbols in a drag-and-drop exercise.

Learners read an analogy comparing mechanical work (in this case, sliding a weight) to that of electrical power. The relationship of work, apparent work, and power factor is developed.

In this animated lesson, students read an analogy comparing water in a "special" water tank to the current "flow" through a capacitor.

Learners read an analogy comparing an electrical transformer to mechanical gears.