In this animated and interactive object, learners examine a depiction of how force is multiplied by a larger cylinder when pressure from a pump is applied to a smaller cylinder. A short quiz completes the activity.

This animated lesson shows how a ladder circuit causes the cylinder of a hydraulic circuit to continuously extend and retract after a Start button has been pressed.

Learners follow steps to determine the proper starting belt length for a timing, flat, or v-belt drive.

Learners view animations showing how a time-of-flight flowmeter uses ultrasonic sound waves to measure the flow of a liquid.

Learners follow steps to add fractions with different denominators. They also review fraction concepts, do a drag-and-drop exercise involving fraction terms, and add fractions with common denominators.

Learners work problems to make conversions between RMS, average, peak, and peak-to-peak AC voltages.

Students view a demonstration of the Current Divider Rule with the use of complex numbers. Examples are given.

Students read an explanation of the Voltage Divider Rule with complex numbers. Examples are given.

Students read an explanation of "superposition" as a technique for ac circuit analysis. Complex numbers are used.

Try and match the number to the word

Spell the numbers by clicking on the letters below.

CHOOSE THE CORRECT NUMBER FOR EACH SPELLED OUT NUMBER