In this well-illustrated activity, learners examine the three types of intermolecular forces: dipole-dipole forces, London or Van der Waals forces, and the hydrogen bond. Two interactive questions are included.

In this animated activity, learners compare the van der Waals equation with the Ideal Gas Law.

In this animated object, learners view a race of two boats as an example of how the derivative function of a PID controller shortens the time duration of an operation.

Use Ohm's law, Watt's law, and the power equation to derive formulas for the DC power wheel.

Learners use trigonometry to calculate angular input forces involving Class 2 mechanical levers.

In this learning activity you'll discover how your visual perception influences your understanding of ambiguous figures.

In this learning activity you'll explore a step-by-step process to solve simple free-body diagrams. They identify forces acting in the x or y direction in interactive exercises.

In this interactive and animated object, learners apply the Law of Sines to determine forces using a TI-86 calculator.

In this interactive object, students use the Law of Sines to calculate forces.

In this animated and interactive object, the learner uses a TI-86 calculator to solve for the magnitude of the resultant and of one of the component forces in a right triangle.

In this animated object, learners use a TI-36X calculator to determine forces.

In this animated and interactive object, the learner uses a Casio fx-260 calculator to solve for the magnitude of the resultant and of one of the component forces in a right triangle.

In this animated and interactive object, the learner uses a TI-36X calculator to solve for the magnitude of the resultant and of one of the component forces in a right triangle.

Learners apply the Law of Cosines to determine forces using a TI-36X calculator in this animated object.

In this interactive learning object, students calculate a resultant of multiple forces acting in a concurrent, coplanar condition.

In this interactive and animated object, learners apply the Law of Cosines to determine forces using a TI-86 calculator.

The learner calculates the resultant of multiple forces acting in a concurrent, coplanar load condition.

In this interactive object, learners use the Law of Cosines to calculate forces.

In this interactive object, learners use the Pythagorean Theorem to calculate forces.

The target audience of this learning object is trigonometry students who have already learned what a radian is and have already derived the key values of the coordinates associated with common radian units, but now need to practice finding those values on the unit circle. The student does not need to know the definition of the six trig functions to do this activity.