In this interactive object, learners examine how work is performed in foot-pounds by a hydraulic system that uses a pump and cylinder. A brief quiz completes the activity.

In this interactive and animated object, learners examine how dc voltages develop across capacitors that are connected in series and in parallel.

The learner solves for Zin(base), Zin(stage), Zout, and Av. A "help" screen is available.

Learners read how quality can be built into a manufacturing process.

Students read the rules used in multiplying and dividing signed numbers. They view examples and work practice problems.

Students read how to organize their work when multiplying more than two signed numbers. A review and practice problems complete the activity.

Learners follow the steps for adding and subtracting signed numbers and complete practice exercises.

Learners choose responses in workplace situations that are compared to positive-attitude responses. They evaluate their responses, looking for areas in which they would like to improve.

In this animated object, learners study how displacement level sensors are used to measure the level of liquid in a tank.

11.1 Distance and Displacement

Learn about the 6 types of disability

Help the scientist to answer the correct energy type for each situation!

Identify what degree of comparison is the underlined adjective.