Students view a demonstration of Kirchhoff's Current Law (KCL) using complex numbers with respect to ac.

Learners analyze an emitter-biased npn transistor circuit. A "help" screen is available.

In this animated object, learners examine how thermal energy is transferred by conduction, convection, and radiation. A brief quiz completes the activity.

In this learning activity you'll review the steps for determining the total capacitance of a parallel circuit and work practice problems.

In this learning activity you'll explore how units in the metric system are related to each other and practice locating measurements on a metric line.

In this learning activity you'll practice converting from one metric unit to another.

Learners read a description of how an oscilloscope is used to measure the frequency of a sine wave.

In this animated lesson, learners follow the steps required to read the phase shift difference in degrees between two AC waveforms.

Learners review the process for calculating board feet and use virtual samples to practice the process.

Practice problems in calculating tolerance in fraction inch, decimal inch and metric measurements.

physical and chemical Perm terminology

Choice Board

Test your knowledge of measurement by answers the questions!