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.

In this interactive object, learners calculate formula and molecular weights by working through five examples and two problems.

In this animated learning object, users view the process of entering a formula in an Excel spreadsheet. Several different methods and associated examples are given.

Use Ohm's law, Watt's law, and the power equation to derive formulas for the DC power wheel.

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

Formulas and Functions in Microsoft Excel

A learning object to illustrate the right way to enter formulas and functions in Excel.

In this interactive object, learners complete dental formulas for various species of animals.

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

Students read how to lock a cell that is being referenced in a formula so that it does not automatically show an increment when the formula is copied.

In this learning activity you'll review the format for a five-paragraph essay, which is the second part of the GED Writing Test.

In this learning activity you'll create strategies for sending and receiving complaints and requests.

Learners read an explanation of the RL time constant and examine the formula for calculating the instantaneous current value. The current is graphed as it climbs to maximum or drops to zero. Note* In the formulas in this module, the Greek letter epsilon should be the mathematical constant 'e'.

Learners read how inches of water column is used as a unit of pressure measurement. Practical applications and a conversion formula to psi are included.

In this animated and interactive object, learners examine the formula for horsepower and work practice problems.

This interactive activity represents the grid modeling technique, a heuristic model for choosing a centralized location for a manufacturing or distribution center within a supply chain network. The formula calculates a central point between the suppliers and the markets. This object requires the latest version of Flash Player.

In this animated object, learners examine neutral fats, phospholipids, and cholesterol. The molecular formula and general function for each are shown.

In this interactive object, learners study the properties of a trapezoid and use a geometric formula to find its perimeter and area.

Learners examine the costs of replacing an employee. Using a formula, students calculate these expenses in practice exercises.

Users calculate the tonnage required to punch holes in a specific base metal. The formula to be used is provided along with the tensile strength for various metals. A calculator is required.

In this animated and interactive object, learners use an algebraic formula to solve a problem involving distance, rate, and time.