References

1. Richard Taylor, David Hutson, Wesley Krawiec, Jhone Ebert, and Robin Rubinstein, “Computer physics on the playground,” Phys. Teach. 33, 332–337 (Sept. 1995). first citation in article
   
2. Part of the iLife suite on the Macintosh by Apple computer (http://www.apple.com). first citation in article
   
3. The uncertainty is calculated according to standard procedures for propagating random errors in a calculation, as described in depth by J.R. Taylor, An Introduction to Error Analysis (University Science Books, Herndon, VA,1982), pp. 56–57. first citation in article