Learners study the descriptions of the three words in a PLC timer: EN, DN, and TT. They then test their knowledge in a brief quiz.

Learners examine the elements of a data file memory of an Allen-Bradley SLC-500 programmable controller. A quiz completes the activity.

Learners study an animated block diagram that describes the function of each element in a closed-loop system used in industrial automation.

Learners examine the basic elements of a machine vision system. A short quiz completes the activity.

Atomic weights are used to convert the mass of a sample into the number of moles of the element in the sample and vice versa. Four examples are provided for practice.

In this interactive object, students explore the basic elements and common terms associated with dimensions and leaders. A quiz completes the activity.

Students practice identifying common elements from the periodic table by name or symbol.

In this screencast, learners examine the internal elements of a 555 IC and their operation.

In this interactive object, learners identify the elements of the Windows platform in a drag-and-drop exercise.

In this animated object, learners examine the parts of a plastics extruder. A quiz completes the activity.

In this screencast, we review the positions of metals, metalloids, and nonmetals in the Periodic Table and the general characteristics of each.

Learners view animations showing the operation of the internal parts of an AC generator. A short quiz completes the activity.

In this learning activity you'll review definitions then match the transactional communication model element with the definition or example.

In this screencast, students read about the basic organization and structure of the periodic table of elements. Students identify elements as belonging to a group, a period, or neither.

Learners examine the method used to calculate the mass percent of an element in a compound. Three examples and one problem illustrate the method.

Learners follow the steps for reducing all of the elements of a complex circuit to a single current source and a single source resistance to create a simple circuit. Several examples are given for dc circuits. The conversion between Thevenin and Norton is also presented.

Learners follow a four-step process to determine the empirical formula of a compound from the masses of its constituent elements. The molecular formula is determined in a fifth step using the molecular weight of the compound.

Learners read the definition of atomic weight and obtain the weights of elements by viewing the Periodic Table and charts that list atomic weights by name or symbol.

Learners read definitions of atomic symbols, atomic numbers, and mass numbers and then answer questions about the number of neutrons, protons, and electrons in select elements.

In this animated learning object, students examine the addresses of PLC elements and how they pertain to I/O connections and internal memory files.