In this animated activity, learners examine the construction of a binary counter using a JK flip-flop. The ability of the JK flip-flop to "toggle" Q is also viewed.

The learner views the operation of a transistor switching from saturation to cutoff. A brief quiz completes the activity.

In this screencast, learners read an explanation of the color code used on schematic diagrams for hydraulic circuits. Circuit examples for each color are shown.

In this learning activity you'll review the steps for calibrating the length of depth micrometer measuring rods.

In this learning activity you'll examine the RG ratings, networking applications, and types of connections for various coaxial cables.

Learners examine the circuitry in a DC variable speed drive that protects the rectifier diodes and motor windings from being damaged due to excessive current.

In this animated print reading exercise, the learner calculates missing dimensions and identifies surfaces on projected views.

The learner will understand the operation of motor control circuits used to start and stop three-phase motors.

Learners will determine if they are satisfied with their attitudes and then rank tips for regaining a positive disposition in the workplace.

Students examine how to interpret resistor color code bands to determine resistance values and tolerance ranges. This interactive learning object has audio content and includes exercises.

Learners distinguish between competencies that are effective and robust, and those that are ineffective and weak. The learning object is designed for faculty who are writing or revising courses. It contains audio.

In this highly interactive and animated object, learners examine the VAT-40 battery starting and charging system tester and study how the tester is used to diagnose vehicle starting system problems. This object has audio.

Learners read how to use a lumber rule to quickly and accurately estimate board feet. They then use virtual samples to practice the process.

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

In this interactive object, the learner reads an explanation of how various shielding gases are used in GMAW and FCAW. An exercise completes the activity.

Learners mentally manipulate two-dimensional diagrams to visualize the objects in their three-dimensional forms.

In this animated activity, learners read an explanation of the four different modalities (currents) used in electrotherapy.

In this animated object, learners examine how magnetic waves are transmitted as radio signals.

In this animated learning object, students read about the backflow of contaminated water and how to prevent it.

In this animated object, learners view a race of two boats as an example of how the derivative function of a PID controller shortens the time duration of an operation.

This document gives an overview of chuck maintenance.

In this animated object, learners examine the design of a ladder circuit that provides manual control to a water pumping system. Students also study modifications to the circuit as the complexity of the system increases.

In this learning activity, you’ll identify information hackers use to gain access to a company, explain different types of social engineering attacks, and recognize different solutions to avoid these attacks.

At the end of this lesson you will be able to

- Explain what biosecurity means.

- Describe why biosecurity is important.

- Identify what kinds of disease agents we try to prevent or control with biosecurity.

- Demonstrate disease agent-host-environmental interactions that result in disease.

Learners view a vector diagram for a series RC circuit and read information concerning the voltage across each component, the total voltage, and the phase angle.