In this interactive object, learners solve for total resistance and current, the current through each resistor, the voltage across each resistor, and the power dissipated by each resistor.

In this interactive object, learners solve a series-parallel DC circuit analysis problem. Immediate step-by-step feedback is given.

In this learning activity you'll examine the software operation Dynamic Host Configuration Protocol (DHCP), which automatically performs TCP/IP configurations.

Learners identify the major components of an aircraft and the functions of these components.

Learners listen to an explanation of balance sheet basics for farm operations. They then determine how purchases should be listed in a farm record book and complete sample income and expense sheets.

In this interactive object, learners follow six steps for analyzing a process in a manufacturing setting. This activity includes a drag-and-drop exercise and textboxes where learners post their ideas.

Learners view videos of law enforcement and corrections officers describing their jobs and the opportunities in their fields. Because this object contains large video files, it is best viewed using a high band width connection. Low band widths will result in longer download time and video delays.

In this learning activity you'll review how an OR gate operates using a truth table, a Boolean Algebra equation, a switch analogy, and a written statement.

In this animated activity, the learner examines how a 74150 IC multiplexer and a 74154 IC demultiplexer work together when their data select lines are connected to the same input devices.

Learners examine the proper formats for block letters, modified block letters, simplified letters, memos, e-mail messages, and envelopes.

Learners test their knowledge of mobile and operative radiography procedures while playing video soccer.

Learners view a demonstration of Kirchhoff's Voltage Law using complex numbers for an ac circuit.

Students read an explanation of the Voltage Divider Rule with complex numbers. Examples are given.

The student studies the method to calculate complex power where the Vrms of a circuit is multiplied by the complex conjugate of the total circuit current. Several examples are given, along with the power triangle.

Students read about the process of hair growth beginning with the joining together of amino acids.

Learners are introduced to primary and secondary batteries. Examples are given.

This objects reviews the Five "S" manufacturing system and helps learners to remember the process.

Learners observe the four functions of oil in a hydraulic system.

Students read about the use of business cards in various countries and the customs that Americans should follow when presenting a card in those parts of the world.

Learners examine the two methods used by programmable logic controllers to perform a counting operation using addition or counter instructions. A brief quiz completes the activity.

In this overview, students examine and identify mannitol positive and mannitol negative bacteria on mannitol salt agar.

In this learning object the student will learn how to measure a stain and calculate angles of impact. Determining the angle of impact for bloodstains takes advantage of the trigonometric functions (Sine function).

A mathematical relationship exists between the width and length of an elliptical bloodstain which allows for the calculation of the angle of the impact for the original spherical drop of blood.

Given well formed stains we can accurately measure the width and length by simply dividing the stain along it’s major and minor axis. The opposite halves would be generally equal to each other which aids in establishing the impact angle.

Learners study the mathematical calculations used to determine the proper PID values to be entered into a controller using the Ziegler-Nichols Reaction Curve.

In this screencast, learners examine the properties of the peptide bond and how the bond relates to the structure of hair.

Learners examine the three steps of a processor scan cycle.