On 01/01/2013 11:03 AM, Chris Angelico wrote: > On Wed, Jan 2, 2013 at 2:40 AM, <usamazo...@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 -- http://mail.python.org/mailman/listinfo/python-list
