Learners examine the basic types of dimensioning including unidirectional and aligned systems, and linear, aligned, angled, arrowless, chain, datum, chart, tabular, radius, diameter, typical, and reference dimensions.

Learners examine the differences and similarities between hydraulic and pneumatic systems.

In this animated object, learners examine how psychotropic medications act on neurotransmitter systems to achieve their desired effect.

Learners review normal conditions that are associated with aging. Changes are highlighted in the cardiovascular, musculoskeletal, respiratory, gastrointestinal, urinary, reproductive, endocrine, nervous, and sensory systems.

Students answer 10 questions in a sample exam. This exercise covers number systems, number conversion, logic gates, and combinational design. Feedback is provided.

In this animated activity, learners examine the three main segments of a hydraulic system: power supply, control, and output. A brief quiz completes the learning object.

Learners quiz themselves on the conversion factors within and between the metric, apothecary, and household systems.

Learners review Ohm's Law and then work 12 problems to help them apply the law to automotive electrical systems. In each of the problems, students are given two of the three variables (voltage, resistance, or current) and are asked to solve for the third.

Learners view the conversion factors within and between the metric, apothecary, and household systems. A quiz completes the activity.

Learners examine the operation of positive and non-positive displacement compressors used in pneumatic systems.

In this learning activity you'll examine how computers operate in a peer-to-peer network operating system.

In this interactive and animated object, learners examine the SUN VAT-40 battery starting and charging system tester. This learning object demonstrates the use of the tester in diagnosing conventional 12-volt automotive charging systems. It contains audio.

In this learning activity you'll solve systems of two linear equations in two unknowns by determinants.

Learners read an introduction to the four basic types of force systems for a statically determinate condition.

Learners are introduced to the binary-coded decimal, a common way of encoding decimal digits in computing and electronic systems. A brief quiz completes the activity.

Learners read about the different kinds of positions available in the accounting field at private corporations, government agencies, and not-for-profit organizations.

Learners review Ohm's Law and then work 12 problems to help them apply the law to automotive electrical systems. In each of the problems, students are given two of the three variables (voltage, resistance, or current) and are asked to solve for the third.

In this animated learning object, learners examine the regulation of inducible operons in bacterial systems.

Learners examine the relationship of voltage, current, and resistance as it applies to vehicle electrical systems.

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.