General Shop Safety - Hazardous Materials Safety (SDS)
In this learning activity you'll review the hazardous materials safety document which display an example of a SDS or MSDS (Material Safety Data Sheet).
In this learning activity you'll review how every protein molecule of an organism is synthesized by that organism in a prescribed process. This activity helps students understand the fundamental life process of making protein.
Writers block happens to all of us. Homework block is even worse. If you’re stuck on how to get started, watch this video to explore how to generate ideas for speeches, papers, and projects quickly and effectively.
In this animated activity, learners examine how a voltage is induced into a conductor when the conductor cuts across magnetic flux lines. They also view the four factors that determine how much voltage is generated. A brief quiz completes the learning object.
Students read information about basic logic gates including the gates' names, symbols, Boolean expressions, pronunciations, and truth tables. They then complete a matching exercise.
Learners listen to effective techniques to successfully interact with customers via the telephone. They also submit their own suggested replies to customers in various scenarios. Topics include general telephone etiquette, dealing with angry callers, working with confused or unsure customers, and managing voicemail. A quiz completes this customer service activity.
Automotive Electrical Systems VAT-40 - Generator, Regulator, Diode Test
In this interactive and animated object, learners examine the SUN VAT-40 battery starting and charging system tester. This learning object demonstrates the use of the tester in diagnosing conventional 12-volt automotive charging systems. It contains audio.
Learners examine an animation that shows how an AC voltage is produced as an armature rotates within a magnetic field. Ten review questions complete the learning object.
Stain Measurement & Calculating Angles of Impact (Screencast)
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.
This screencast, we see how the shape of a stain defines the angle of impact. In general terms the more circular the stain, the more perpendicular will be the angle at which it struck the surface. The more elliptical the shape of the stain, the more acute the angle will be. With practice and experience, the analyst can recognize the general angle of impact based solely on the shape of the stain.