The conversion from rectangular to polar mode phase angle in radians is demonstrated in Excel.

The learner will recognize standard-position angles and find the reference angle for any standard-position 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.

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 animated lesson, learners follow the steps required to read the phase shift difference in degrees between two AC waveforms.

Learners examine phase diagrams that show the phases of solid, liquid, and gas as well as the triple point and critical point.

In this interactive object, learners follow steps to find phase voltages in a partial three-phase power distribution circuit.

In this learning activity you'll discover how visual perception of size is influenced by what's surrounding an image.

In this interactive object, students calculate capacitive reactance, phase angle, impedance, and power in series RC circuits.

This video will demonstrate angle turning with a compound rest on an engine lathe.

In this learning activity you'll plot GDP data on a graph and determine a phase of the business cycle.

Students calculate current, phase angle, resistor voltage, inductor voltage, and power.

Learners view a demonstration showing that line-neutral voltages and line-line voltages are not in-phase with each other, but have a definite 30-degree relationship.

The learner will understand the two methods used to create a phase shift in current between two windings.

This project gives a drawing with steps to complete the activity.

This project gives a drawing with steps to complete the activity.

Learners will understand how the interaction of the armature magnetic field and the rotating stator field cause the rotor of a single-phase AC motor to turn.

Learners read about the vector diagram for a parallel RC circuit. This animated lesson presents information on current flow through each branch, total current, and phase angle.

Learners view a vector diagram for a series RC circuit and read information concerning the voltage across each component, the total voltage, and the phase angle.

Learners examine how melting, vaporization, and sublimation require energy input while freezing and condensation release energy.