In this animated object, learners examine how the rotation of an induction AC motor's armature slips behind the synchronous rotational speed of the stator's field to create magnetic fields. These fields interact and produce torque. A quiz completes the activity.

This document is a visual and text description of lathe cutting speeds and RPM calculations.

In this learning activity you'll determine the measurement to be made and the accuracy required.

Students view the formula for determining twist drill speeds in metal. Exercises complete the activity.

Students review the best practices for using a ruler and answer five basic questions.

You'll learn to read a decimal steel rule.

You'll practice specifying the correct measurement for the vernier caliper.

You'll practice converting units of measure for area in the metric system.