Learners examine an animation that shows how an AC voltage is produced as an armature rotates within a magnetic field. Ten review questions complete the learning object.

In this interactive object, students view an animated depiction of Class 1 levers. A matching quiz completes the activity.

Learners examine the formulas that are used to determine the proper PID values to be entered into a controller using the Ziegler-Nichols Continuous Cycling Tuning Method.

In this learning activity you'll review independent and dependent variables and view a demonstration of the positive and negative correlation.

Students read how to determine the elevation of an alignment or cross section where it crosses the TIN.