Rice University
Rice University: Cynthia Lanius: Visualizing an Infinite Series
This site explains the infinite series through visualization.
Other
Gyroscopes.org: Gyrosopic Propulsion
This site explores the speculative concept of gyroscope propulsion, including a description of force precessed gyroscopes. This research could theoretically lead to the development of new engines and thrust devices.
University of Colorado
University of Colorado: Physics 2000: Constructive and Destructive Wave Interference
A physics course web page that features a Java applet in which visitors can observe the waveform resulting from the interference of two waves. The amplitude and wavelength of the interfering waves can be altered and the outcome observed.