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Mathematica Problems Oh man !

  1. Nov 12, 2007 #1
    1. The problem statement, all variables and given/known data

    I'm having problems interating the following function numerically using Mathematica.
    efield := 10^15
    ion := 10^-15
    \[Epsilon] := 8.8541878176^-12
    q:=1.60217648710^-19

    2. Relevant equations


    x2:= (1/2 - 1/(2*ion) Sqrt[ion^2 - (q^3*efield^2)/(\[Pi]*\[Epsilon])])
    x1:= (1/2 + 1/(2*ion) Sqrt[ion^2 - (q^3*efield^2)/(\[Pi]*\[Epsilon])])
    Integrate[(3/2)*
    Sqrt[1 - q^3*
    efield*x^(-1)/(4*\[Pi]*\[Epsilon]) - x], {x,
    x1, x2}]


    3. The attempt at a solution
    I receive the following error message:
    Integrate::ilim: "Invalid integration variable or limit(s) in \
    {1000000000000000000000000000000\ 1.60218^(19\\:2212)\ \
    x,1/2-500<<8>>0000\ <<1>>,1/2+500000000000000 \
    Sqrt[1/(100<<25>>000)-<<1>>]}"

    I hate computers
     
    Last edited: Nov 12, 2007
  2. jcsd
  3. Nov 12, 2007 #2

    EnumaElish

    User Avatar
    Science Advisor
    Homework Helper

    M. version 6.0.1.0 yields -3.85436*10^36 - 1.25626*10^44 \[ImaginaryI]
     
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