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So im fairly new to Mathematica (and the physics forums too). I am having a problem with mathematica not calculating the numeric result to an very complex integral. My question is, how do I force it to evaluate the integral as a number? I'm assuming that the integral of a square root is possible in mathematica as i checked the help files and it seems to suggest it is. I have tried the evaluation both with and without using n[A] which seems to be the suggested method of forcing a numeric evaluation.

K=1

R=1

VM=1

L=1

radius=1

z=-0.000000*x^6 - 0.000000*x^5 + 0.000049*x^4 + 0.000115*x^3 - 0.018528*x^2 - 0.033042*x + 2.964166

dzdx=D[z,x]

absdzdx=Abs[dzdx]

sqrtfactor=Sqrt[1+dzdx^2]

A=2*Pi*K*R*VM*L*(Integrate[(6.5+4.56*(absdzdx)+0.654*(absdzdx)^2)*x*sqrtfactor,{x,0,r}])*((2*Pi*\!\(

\*SubsuperscriptBox[\(\[Integral]\), \(0\), \(r\)]\(\((x*sqrtfactor)\) \[DifferentialD]x\)\))/10000)

I have tried to break up the calculations so that mathematica doesnt take to long to calculate it but it still seems to take at least 3 or 4 mins of running before it displays an answer. The variables do unfortunately need to stay seperate as they will be changed. I apologise in advance if it is just some stupid error of mine.

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# Mathematica: Printing Numeric Result

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