CK-12 Foundation
Ck 12 Exploration Series: Simulations: Physics: Clarke's Dream
[Free Registration/Login Required] Learn about geosynchronous orbits and their use in satellite communication.
Georgia State University
Georgia State University: Hyper Physics: Earth Orbit Velocity
A discussion and statement of an equation for orbital speed. An interactive JavaScript form allows the user to investigate the relationship between orbital height and orbital speed. A very good opportunity to practice and receive...