Science
posted by Panagiotis .
I am trying to built a cross section of a beam. I need a strong light wood, that would give the best efficiency. A force of 1500lb is going to be applied on it. So i have to make sure it wont break. What is the best choice of wood beam, and also what kind of beam is better, a W, an I, a T beam?
Please let me know it a very serious matter.

Here is a link on different strengths, depending upon which chracteristic you need:
http://www.madsci.org/posts/archives/200502/1108396177.Bt.r.html
Sra 
If the experiment required 2.4 equivalents of 9.0 M sulfuric acid, how many millimoles of 9.0 M sulfuric acid would you use?
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