In this learning activity you'll practice converting between degree minute second and decimal degree.

In this learning activity you'll examine force, mass, and acceleration to understand this "Law of Acceleration."

In this interactive object, learners read the definitions of terms associated with the construction of a grouped frequency distribution. A brief quiz completes the activity.

The student will read a mini-lecture explaining the organization stage in the perception process and will complete an activity.

The student reviews primary and secondary groups and takes a short quiz.

In this animated object, learners compare the mode of action of steroids with the action of amino acid-based hormones.

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 activity you'll practice designing a table in second normal form.

Learners examine first and second approximations and view examples of a "stiff" current source.

Learners examine how vapor pressure is calculated. The vapor pressure of a liquid increases with increasing temperature. If the heat of vaporization and the vapor pressure at one temperature are known, the vapor pressure at a second temperature can be calculated.

Students examine the first and second approximations of a voltage source. A "stiff" voltage source is defined, and several examples are given.

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

Learners review the differences within the right and left parietal lobes. They answer questions based on a case study and describe a client in a second case study.

Learners will write effective business messages that incorporate a second-person point of view and focus on the benefit to the reader. This approach is often used to create positive messages, neutral messages, and inquiry messages in business settings.

Learners examine how the load resistance connected to the secondary coil of a transformer affects the primary current. A brief quiz completes the activity.

Students read descriptions of the voltage, current, and turns ratios of the primary and secondary coils for a transformer in this interactive lesson.

In this animated object, students examine the shades that result from mixing primary and secondary colors. Color tone and level are also defined.

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

In this learning activity you'll explore the differences between primary and secondary research.

Learners read a description of the wiring configuration of a residential Edison Wire System, which consists of a transformer secondary circuit. The circuit supplies two 115-volt sources and one 230-volt source.