In this animated and interactive object, the learner designs a treatment plan that includes precautions and adaptive equipment.

Learners examine and identify the parts of the hip joint.

Learners read about five different fractures of the hip and the treatments used.

Learners examine the factors that contribute to hip fractures including osteoarthritis, osteoporosis, and osteomalacia.

In this animated object, learners examine the bones of the appendicular skeleton.

In this learning object you'll examine the supply and demand curves and to demonstrate the effects on equilibrium price/quantity and on price ceilings and floors.

This interactive learning object demonstrates how the moisture content is determined for a given sample of soil or aggregate.

In this interactive object, learners vary the value of the resistance to see how it affects current. Example problems are included.

In this animated object, learners examine the relationship between pressure and temperature in an air conditioning system.

In this learning activity you'll explain how voltage and resistance in a series circuit affect current flow.

Learners examine three formulas than can be used to find dc power. Examples are given.

Students read how to determine and calculate the porosity for a given sample of soil or aggregate, based on the weight-volume relationship.

In this learning activity you'll examine how firewalls block viruses by discussing trusted, semi-trusted, and untrusted networks.

Students read an explanation of the use of weight-volume relationships and practice calculating density.

Students read about the key differences between management and leadership activities. In an interactive activity, they identify typical supervisory activities as either management or leadership and respond with their own examples.

Students read how to determine and calculate the void ratio for a given sample of soil or aggregate based on the weight-volume relationship.

Students read how to determine and calculate the degree of saturation for a given sample of soil or aggregate based on the weight-volume relationship.

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.

Students read about the concept of unit weight relating to the 3-phase diagram and perform calculations.

Learners view a demonstration showing that line-neutral voltages and line-line voltages are not in-phase with each other, but have a definite 30-degree relationship.