Heat flows through solids at rates measured by their conductivity. The rate of heat flow is also proportional to the thickness of the material. This model compares the rate of…
This model shows the combined effects of heat capacity and conductivity.
…is called natural convection. Air is constantly circulating indoors and outdoors, moving heat from one place to another. With this model you can compare how conduction and convection transfer heat….
…this model you can explore how convection works if the heat source is near the ceiling of a room. You can also compare it to conduction in the same setting….
Compare the change in potential energy when you separate molecules from each versus when you break molecules apart.
Transistors are the building blocks of modern electronic devices. Your cell phones, iPods, and computers all depend on them to operate. Thanks to today’s microfabrication technology, transistors can be made…
Investigate the difference in attractive force between polar and non-polar molecules by “pulling” apart pairs of molecules. While all molecules are attracted to each other, some attractions are stronger than…
Investigate the difference in attractive force between polar and non-polar molecules by “pulling” apart pairs of molecules. While all molecules are attracted to each other, some attractions are stronger than…
This activity helps students understand all transformations of functions: translations, dilations and reflections. The function retains its basic shape when it is transformed; however, by making small changes to the…
…is to locate the faulted resistor with as few measurements as possible, and to identify the nature of the fault. The circuits increase in complexity from level to level, making…