You have incorrectly changed the equation for resisitivity twice. Try looking up the equation on a reputable site. Resistivity is proportional to area/length.

Resistivity

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Warning

Please refrain from undoing other people's edits repeatedly. If you continue, you may be blocked from editing Wikipedia. Note that the three-revert rule prohibits making more than three reversions in a content dispute within a 24 hour period. Additionally, users who perform a large number of reversions in content disputes may be blocked for edit warring, even if they do not technically violate the three-revert rule. Rather than reverting, discuss disputed changes on the talk page. The revision you want is not going to be implemented by edit warring. Thank you. — Omegatron 18:39, 24 February 2007 (UTC)Reply

I am sorry, I am new to wikipedia, I have taken your comments on-board and have now started a discussion. I hope that it can be resolved quickly. Mrpowers999 23:30, 24 February 2007 (UTC)Reply

Welcome

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Welcome!

Hello, Mrpowers999, and welcome to Wikipedia! Thank you for your contributions. I hope you like the place and decide to stay. Here are some pages that you might find helpful:

I hope you enjoy editing here and being a Wikipedian! Please sign your name on talk pages using four tildes (~~~~); this will automatically produce your name and the date. If you need help, check out Wikipedia:Questions, ask me on my talk page, or ask your question and then place {{helpme}} after the question on your talk page. Again, welcome! 

Please stop bolding every instance of the title in an article. If you want to contribute here, please learn our style conventions first. — Omegatron 23:09, 24 February 2007 (UTC)Reply

Again I apologise Omegatron, I had read the tuturials and some of the help pages before I edited this page. I was :under the impression that it was wikipedia policy to bold instances of the article's title in the document.Mrpowers999 23:36, 24 February 2007 (UTC)Reply
Is there a specific help page that outlines policys such as this or have I just mis-read/mis-understood/missed this :point?
It's the first instance of the title (which should be in the first sentence of the article) which gets bolded. The manual of style outlines the style based stuff. --pgk 23:39, 24 February 2007 (UTC)Reply
Thankyou, and I am very impressed with the speed of your response, I will get to reading the manual of style and intergrate it inot my future contributions.Mrpowers999 23:41, 24 February 2007 (UTC)Reply

Tip

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Thanks for noticing, I am gonna put a few pics up on my userpage in a short time. Imageboy1 00:33, 25 February 2007 (UTC)Reply