Learners read a description of torque and study the factors that cause its magnitude to change.

Learners examine a table containing the names of common cations and anions.

Learners calculate the total cost of a loan by entering the principal amount, the period of the loan, and the annual percentage rate.

Roman numerals are used to identify the charges on metal cations having multiple oxidation states. Five examples are provided for practice.

Learners study animation showing the operation of cumulative and differential DC compound motors. A short quiz completes the activity.

This video will demonstrate angle turning with a compound rest on an engine lathe.

Learners complete an exercise to match chemical formulas with the names of binary compounds, tertiary compounds, and ions.

Learners view movie clips to determine the solubility of two ionic compounds. They also examine a solubility chart and predict the solubility of compounds.

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

In this interactive and animated object, students distribute the valence electrons in simple covalent molecules with one central atom. Six rules are followed to show the bonding and nonbonding electrons in Lewis dot structures. The process is well illustrated with eight worked examples and two interactive practice problems.

Students review the rule for pluralizing compound nouns. They then complete an exercise.

Learners examine a table of common polyatomic ions. Eight examples are provided for practice.