This learning object describes the production of an alternating current in a generator with a single-loop armature. An illustration of how a sine wave is produced is shown through animation.

In this animated activity, learners examine how an electronic converter changes digital signals to analog signals. Sections of a synthesizer are identified, and the operation of a D/A converter is demonstrated.

In this interactive object, learners answer nine questions about inductors.

Students view the parts and movements of a combustion engine in this animated activity. Each part is described.

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.

Learners get a hit each time they answer a question correctly. A student may test his/her drug calculation skills by playing the baseball game alone, or against another player.

Spin, math, time and measurement

Enzymes

The learner will practice reading a Vernier caliper.