In this learning activity you'll explore how to reduce electromagnetic interference (EMI) and crosstalk between adjacent wires.

Learners study the effect of reflected and transmitted energy on the measurement of emitted energy by a non-blackbody. A short quiz completes the activity.

Students view a dc analysis of an emitter-biased NPN transistor.

In this animated object, learners examine synthesis, decomposition, exchange, and reversible reactions.

In this animated lesson, learners read about the disulfide bond, the second strongest chemical bond in the hair. This bond can only be altered by chemicals.

In this animated and interactive object, learners examine kinetic and potential energy as well as the first law of thermodynamics and the flow of energy between a system and its surroundings. Students also answer questions about exothermic and endothermic reactions

In this interactive object, students examine a type of chemical bond known as the "hydrogen bond."

You will be guided through doing a precision layout a part from a drawing.

Students read about the concepts of saturation and cutoff. They view diagrams that illustrate the interaction of the load line and the family of curves.

In this interactive object, learners examine the PN sections of a diode and the diode's forward- and reverse-biased operations. A brief quiz completes the activity.

Students read about light-emitting diodes, including LED voltage and current, and how to protect against reverse voltage.

Learners use the coefficients in a balanced equation to develop the mole ratios of reactants and products involved in the reaction. Five interactive examples illustrate the method, and students test their knowledge by working four problems.

In this animated object, learners examine how changes in pH affect the salt bonds in strands of hair.

Students read an explanation of chemical formulas in this animated activity. A quiz completes the object.

In this interactive object, learners determine the limiting reagent and the excess reagent in chemical reactions. Learners test their knowledge by solving three problems.

Students use algebra to rearrange formulas and solve for the missing volume, density, or mass quantity.

Learners examine the meaning of theoretical yield, actual yield, and percent yield. They test their knowledge by solving two problems.

In this screencast, learners examine the properties of the hydrogen bond and how the bond changes when hair is shampooed or styled.

In this animated and interactive object, learners calculate the area and centroid of a semicircle.

In this screencast, learners examine the kinds of physical and chemical changes that occur in substances.