User:Mhunter2/sandbox

https://en.wikipedia.org/wiki/P-wave This page is valuable to my topic because it describes the waves that can be used. The article explains P waves well with both words and figures, but it might be useful of it also provided a picture of the wave function graphed in order to get an idea of what to look for.

https://en.wikipedia.org/wiki/Periodic_table This page allows someone to look for the atoms weight of different elements that are used in the equation. It would be useful if w you could click individual elements on the table and be taken to the page containing information on the element in question.

https://en.wikipedia.org/wiki/Density You can never assume people know what you are talking about when you mention density. This is a useful article to add to Birch's Law page because the law is based on density. Linking this page allows people looking at it to be sure they know what is meant by density. The density page is well written and can be understood by most people, but it could use more figures susceptible density.

I plan on editing the stub article on Birch's Law which relates the velocity of ap-wave to the average density of the material the wave is moving through. This is useful because if you knew the density of the material you can make a few assumptions and find what material these waves are moving through. I am wanting to start the article with a definition of Birch's Law similar to what it already has, and then I want to mention the history of how it was discovered by Birch and how out is used. I would like to finish with limitations that arise from using Birch's Law. If possible, I would like to add a table composed of common elements found in the earth and the corresponding average velocity of a p-wave moving through it. That would allow people to make a quick reference to the table to see what material the wave is moving through.