1. The problem statement, all variables and given/known data Check on labb41.jpeg (I am not used to formatting my mathematical equations on the web, I can only format in my local text-editing programs). 2. Relevant equations Again, check on labb41.jpeg 3. The attempt at a solution I have plot the solution to U(I) as according to the assignment. Please check solution1.jpeg to se my solution plot. I am very sure that my solution is correct. The only question I have about this assignment is why the temperatures in the real model (I assumed that it is meant about the given differential equation) cannot be higher than the temperatures in the equation to be solved with Newton-Raphson's method and then plot U(I) for I=0.1,0.2,...,10 in the first assignment. I am not sure about how to explain this, so a little help here would be worth gold to me now. Thanks in advance for helping me with this problem! P.S. If this thread is posted in wrong forum, please tell me were I should ask these questions then so I will know it for further times.