The tools and material provided by this website were built by Mark Mitchell - a software developer, physicist and occasional college teacher - to support various personal projects that he has been involved in. All of the material is made freely available for non-profit use.
Extensive animations have been added when possible to (hopefully) make concepts more understandable. Also, several web pages have a link to a corresponding calculations page that describes how the calculations were derived.
This website was originally located at www.mitchellscience.com. In 2013 this site was moved to www.mitchellscience.net as part of a migration from Drupal to .NET.
The author may be contacted for further information.