Thursday
December 12, 2013

# Posts by Odesa

Total # Posts: 99

chemistry
Thank you

chemistry
Thank you

Chemistry
Do you any idea to answer this question below, do give some input by providing data and how to with formula. A latex balloon, wall thickness 3.091 x 10-4 m, contains helium at a concentration of 0.31 kg m-3. Under these conditions the total surface area of the balloon is 0.11 ...

Chemistry
Example:(remember to substitute with your data) Step 1: ξ= (0.5 * carbon concentration at the surface of the steel - carbon concentration at the surface of the steel)/ (carbon concentration in the steel before carburization - carbon concentration at the surface of the ste...

Chemistry
Step 1: ξ= (0.5 * carbon concentration at the surface of the steel - carbon concentration at the surface of the steel)/ (carbon concentration in the steel before carburization - carbon concentration at the surface of the steel) (0.5* 8655.0 - 8655.0 )/ ( 299.0 - 8655.0 )=...

chemistry
Step 1: ξ= (0.5 * carbon concentration at the surface of the steel - carbon concentration at the surface of the steel)/ (carbon concentration in the steel before carburization - carbon concentration at the surface of the steel) (0.5* 6700.0 - 6700.0 )/ ( 213.5 - 6700.0 )=...

chemistry
74.5years X (multiply) with 5.64386

Chemistry
**We are here to help each other on this forum. Hope the info below helps'! Step 1: ξ= (0.5 * carbon concentration at the surface of the steel - carbon concentration at the surface of the steel)/ (carbon concentration in the steel before carburization - carbon concent...

Chemistry
Step 1: ξ= (0.5 * carbon concentration at the surface of the steel - carbon concentration at the surface of the steel)/ (carbon concentration in the steel before carburization - carbon concentration at the surface of the steel) (0.5* 7345.0 - 7345.0)/ ( 235.0 - 7345.0)= e...

Chemistry
Step 1: (0.5* 6155.0 - 6155.0)/ ( 211.5 - 6155.0)= erf(ξ) Step 2: erf(ξ < 0.6), use the approximation erf ξ = ξ Step 3: t= d^2/4*D*ξ^2 d=59.0 x 10-2 cm D=3.091 x 10-7 cm2/s Step 4: t in sec -> hours Conversion seconds to hours is total/(60x60)

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