In this animated object, learners examine how a gateway server operates.

This lesson provides a drawing with steps to complete the activity.

This animated lesson demonstrates hydraulic pressure switch applications when the switch is connected to a ladder circuit to operate in a hydraulic system.

Learners read a step-by-step approach on how to connect an ohmmeter when making measurements in this interactive lesson.

This animated lesson shows how a pressure switch connected in a ladder circuit causes the cylinder of a hydraulic circuit to extend and retract.

This animated lesson shows how to calculate the amount of force generated by hydraulic cylinders.

In this animated activity, students view how the Wheatstone bridge is used to activate a temperature alarm. A short quiz completes the lesson.

This animated lesson shows how pushing a start or stop button on a ladder circuit causes the cylinder of a hydraulic circuit to extend and retract.

In this learning activity you'll analyze a scenario using operant conditioning. (For security reasons, the ability to email results to your instructor at the end of the lesson has been disabled)

Learners assess the periodontal status and the health risk factors of a fictitious patient. They also make treatment recommendations in this interactive lesson.

Learners read about the vector diagram for a parallel RL circuit. This animated lesson presents information on current flow through each branch, total current, and phase angle.

Learners read an explanation of the concept of apparent power in a power distribution system involving motors, generators, and transformers. A quiz completes this interactive lesson.

In this animated lesson, students view the operation of an electromechanical relay. A brief quiz concludes the activity.

This animated lesson shows how a photoelectric sensor, connected to a ladder circuit, causes the cylinder of a hydraulic circuit to extend and retract.

In this interactive lesson, learners study examples of nouns that can be counted and nouns that cannot. They then identify whether a word is a "count" or a "noncount" noun in a practice exercise.

In this animated lesson, students read how reducing the thickness of a food is an important factor in cooling it. They also read FDA guidelines for food temperatures.

In this lesson on atomic structure, learners examine how the binding energy of electrons affects light production in certain phosphors used in x-rays.

This animated lesson shows how a ladder circuit causes the cylinder of a hydraulic circuit to continuously extend and retract after a Start button has been pressed.

In this interactive lesson, students view the operation of a solenoid and read about its application. A brief assessment concludes the activity.

This lesson provides a drawing with steps to complete the activity.