In this animated object, learners follow an analogy of water flowing through pipes and valves to see how current increases in a parallel circuit as branches are added.

In this animated activity, users examine the causes of malfunctions in a hydraulic pressure-reducing valve and the problems that result. A short quiz completes the learning object.

In this animated activity, a drill-and-clamp machine is used to show an application of a pressure-reducing valve. Recommendations on how to properly make pressure adjustments are also provided.

Learners study an animation of a spring-and diaphragm actuator controlling the opening of a flow valve.

In this interactive object, learners identify the risk factors and the precautions to follow when treating a patient with a cardiac condition. They also design a treatment plan for that patient.

In this animated object, learners view the "T" and "P" waves and the "QRS complex." A brief quiz completes the activity.

In this animated activity, learners practice listening and counting the apical pulse of adults, children, and infants.

Learners categorize cardiac risk factors and match the signs and symptoms of cardiac distress with the correct terms.