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Re: got stuck in equation

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On 01/01/2013 11:03 AM, Chris Angelico wrote:
> On Wed, Jan 2, 2013 at 2:40 AM,  <usamazohad@gmail.com> wrote:
>> hi . . my name is usama khan
>> i am the student of civil engeering  and we got assignment to make a project program on flexible pavement design using python.
>>
>> i know very litle about programing. still learning from tutorials. u can call me a beginner.
>> now i need to solve this equation so that i can put this in python but the formula of design is very complex
>>
>> Formula is :
>>
>> log(W18) = (Z)(S)+9.36log(SN+1) -2.0+(log(dpsi/(4.5-1.5))(/(.40+1094/(SN+1)^2.5)+2.32log(Mr-)-8.07
>>
>> every thing is constant except this SN. . i want to seperate SN like SN= rest of the stuff. how can i seprate it because manualy its impossible to take SN out.
>> so plz help me out
> This isn't a Python question, it's an algebra one. I don't know what
> Z, S, and so on are, but for the most part, the basic rule of solving
> equations applies: Do the same thing to both sides and it's still
> true. Work on it until you can isolate SN on one side.

Such a rule may not be able to solve an equation when there SN appears
more than once on the RHS, and where it's inside a transcental
function.  I don't consider this an algebra problem, but a programming
problem.

> I don't know what this bit means, though:
>
> 2.32log(Mr-)
>
> Is this a transcription error? You can't subtract nullness from something.
>
> ChrisA

Mr-   was apparently intended to mean "M sub r",  the subgrade resilient
modulus
<http://classes.engr.oregonstate.edu/cce/winter2012/ce492/Modules/04_design_parameters/04-2_body.htm#mr> (in
psi).  Just a number.

The only thing i know about any of this is from here:
  
http://classes.engr.oregonstate.edu/cce/winter2012/ce492/Modules/06_structural_design/06-3_body.htm



-- 

DaveA

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got stuck in equation usamazohad@gmail.com - 2013-01-01 07:40 -0800
  Re: got stuck in equation Chris Angelico <rosuav@gmail.com> - 2013-01-02 03:03 +1100
  Re: got stuck in equation Dave Angel <d@davea.name> - 2013-01-01 11:39 -0500
  Re: got stuck in equation Dave Angel <d@davea.name> - 2013-01-01 11:42 -0500
    Re: got stuck in equation Usama Khan <usamazohad@gmail.com> - 2013-01-01 09:25 -0800
      Re: got stuck in equation Chris Angelico <rosuav@gmail.com> - 2013-01-02 04:51 +1100
      Re: got stuck in equation Ramchandra Apte <maniandram01@gmail.com> - 2013-01-01 21:20 -0800
        Re: got stuck in equation alex23 <wuwei23@gmail.com> - 2013-01-02 01:53 -0800
      Re: got stuck in equation Ramchandra Apte <maniandram01@gmail.com> - 2013-01-01 21:20 -0800
        Re: got stuck in equation DJC <djc@news.invalid> - 2013-01-02 14:44 +0000
    Re: got stuck in equation Usama Khan <usamazohad@gmail.com> - 2013-01-01 09:25 -0800
      Re: got stuck in equation Usama Khan <usamazohad@gmail.com> - 2013-01-01 09:30 -0800
      Re: got stuck in equation Usama Khan <usamazohad@gmail.com> - 2013-01-01 09:30 -0800
      Re: got stuck in equation Roy Smith <roy@panix.com> - 2013-01-01 12:47 -0500
  Re: got stuck in equation Chris Angelico <rosuav@gmail.com> - 2013-01-02 04:44 +1100
    Re: got stuck in equation Usama Khan <usamazohad@gmail.com> - 2013-01-01 10:00 -0800
      Re: got stuck in equation Usama Khan <usamazohad@gmail.com> - 2013-01-01 10:12 -0800
      Re: got stuck in equation Usama Khan <usamazohad@gmail.com> - 2013-01-01 10:12 -0800
    Re: got stuck in equation Usama Khan <usamazohad@gmail.com> - 2013-01-01 10:00 -0800
  Re: got stuck in equation Tim Roberts <timr@probo.com> - 2013-01-01 13:09 -0800

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