Practical Uses of Math And Science (PUMAS)
The On-Line Journal of Math and Science Examples for Pre-College Education

Copyright:
The Web pages and the information contained in them are provided for educational use. Permission is granted to copy and distribute material appearing on this web site (https://pumas.nasa.gov), or any PUMAS mirror sites, for educational purposes, with the following limits:

• PUMAS material may not be included as all or part of material sold for profit, or used for advertising or promotional purposes, without the written permission of the PUMAS Editor.
• PUMAS material may not be distributed in an edited or otherwise altered form, except for classroom use.
• The PUMAS copyright statement, which appears in the header of each example, must be included in all reproductions of PUMAS material.
• The PUMAS Editor must be notified if PUMAS material is reproduced for purposes other than classroom or personal use.
• The most recent copyright statement, which is found on the PUMAS Web Site (https://pumas.nasa.gov) is in effect, and supersedes any previous versions of the PUMAS copyright statement