Learners examine how CEC, base saturation, and soil pH work with each other to define plant nutrient availability.

Students read different definitions of "acids" and "bases." In an interactive exercise, they identify if a substance is an acid or a base.

Students view a dc analysis of a base-biased NPN transistor.

Learners will identify the number of significant digits in practice problems.

In this animated activity, learners examine a systematic method for converting a decimal number (base 10) into a hexadecimal number (base 16).

Learners convert a number from standard form to engineering notation.

In this animated object, learners examine a systematic method for converting a decimal number (base 10) into an octal number (base 8).

In this learning activity you'll examine a systematic method for converting a decimal number (base 10) into a binary number (base 2).

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.

Students review the spelling rules for adding a suffix to a base word. They practice changing the "y" to "i" for some of the words that end in "y."

Learners view several movie clips that demonstrate the use of an indicator to follow the neutralization reaction that occurs when an acid and a base are mixed. Students test their knowledge in a series of questions. Immediate feedback is given.

Students add suffixes to base words to form nouns in this interactive lesson.

Students use the Base Minus One Complement method to perform hexadecimal subtraction.

Learners use the Base Minus One Complement method to do octal subtraction.

Students use the Base Minus One Complement method to perform binary subtraction. This learning activity has audio content and immediate feedback.

In this animated and interactive object, learners use a memory device to identify NPN and PNP transistors. Learners also examine how much the transistors turn on when the voltage applied to the base is varied.

Learners tackle this interactive learning object after studying the mathematics of buying. This activity ties together the ideas of net cost, list price, trade discounts, cash discounts, net cost equivalent, and single discount equivalent, as well as the concepts of part, base, and rate.

Learners add suffixes to base words to form new verbs in this interactive exercise.

Students read how to determine and calculate the saturated unit weight for a given sample of soil or aggregate, based on the weight-volume relationship. Practice problems complete the activity.

Learners listen to an office conversation. They then review tips on how to improve the feedback they give others and practice writing a response based on the conversation they heard.