Students study the concept that the voltage drop across a series circuit resistor is proportional to its resistance. They then complete a brief quiz.

This screencast shows how blood droplets are held together by a strong cohesive molecular force that produces surface tension in each drop and on the external force. Surface tension pulls the surface molecules of a liquid toward its interior, decreasing the surface area and causing the liquid to resist penetration.

In this screencast, the student will learn that regardless of the surface onto which a blood droplet is falling, the angle or velocity at which it does so, or the volume of the droplet, there are four distinct phases involved in the reaction of a moving droplet with impact against a surface.

Learners observe how a blood drop in flight continually accelerates and increases in velocity over time. As the drop falls, resistance accumulates. The increase in stain diameter relative to distance of a typical 50 ml drop of blood is represented here. This activity has audio content.

Learners follow a step-by-step explanation of how to test fuses and circuit interrupting devices.

In this animated object, learners drag resistors of the proper value into a series circuit to cause a required amount of current to flow. Seven review questions complete the activity.

This learning object gives instructors an opportunity to review the definitions of formative and summative assessment and list examples of the evaluations they use. In a drag and drop exercise, they classify a variety of assessment tools as either formative or summative.

In this learning object the student will learn how to measure a stain and calculate angles of impact. Determining the angle of impact for bloodstains takes advantage of the trigonometric functions (Sine function).

A mathematical relationship exists between the width and length of an elliptical bloodstain which allows for the calculation of the angle of the impact for the original spherical drop of blood.

Given well formed stains we can accurately measure the width and length by simply dividing the stain along it’s major and minor axis. The opposite halves would be generally equal to each other which aids in establishing the impact angle.

In this interactive object, learners read about words that give information about another word in a sentence. Students also practice placing modifiers in sentences in drag and drop exercises.

Students solve a molarity problem in a drag and drop exercise.

Learners examine a photo of a Marvel Vertical Band Saw and then identify the parts in a drag and drop exercise.

In this interactive object, learners read the definitions of the parts of a cell and assemble a basic eukaryotic cell in a drag and drop exercise. A matching quiz involving cell terms and their definitions completes the activity.

Students read about the illegal practice of manipulating the boundaries of legislative districts for political gain. They then create their own gerrymandered districts in a drag and drop exercise.

Learners read how to create a spreadsheet to determine the voltage drop across a resistor in an AC circuit. The complex functions explained in other learning objects are used in this example.

Explore vertical hydroponic growing with Fork Farms and FVTC. We'll introduce you to what vertical hydroponic growing is, why it's important to our economy and the environment, and how you can get started.

In this learning activity, you’ll explore the Data Definition Language (DDL) including its three main commands: CREATE, ALTER, and DROP.

I would like to have a human skeleton where specific bones of the skeleton can be dragged and dropped back into the skeleton as a quiz.

In this learning activity you'll assess which zeros are important when defining a number and which zeros can be dropped.

Learners read an explanation of the RL time constant and examine the formula for calculating the instantaneous current value. The current is graphed as it climbs to maximum or drops to zero. Note* In the formulas in this module, the Greek letter epsilon should be the mathematical constant 'e'.