By Mary Lee Rudnick-Kaun
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In this animated object, learners view molecules as they collide and move between two different solutions. They also observe what happens when the temperature of the solutions is raised or lowered.
In this animated activity, students read about the two general types of variable resistors: potentiometers and rheostats. They then answer six multiple-choice questions.
In this animated activity, learners examine the operation of hydraulic directional control valves and the internal components that divert the fluid.