July 2nd, 2017, 04:42 PM  #11 
Global Moderator Joined: Dec 2006 Posts: 18,140 Thanks: 1415  
July 2nd, 2017, 04:55 PM  #12 
Newbie Joined: Feb 2017 From: USA Posts: 28 Thanks: 1  
July 2nd, 2017, 06:45 PM  #13 
Global Moderator Joined: Dec 2006 Posts: 18,140 Thanks: 1415 
What does "fairly accurate" mean, as distinct from, say, "roughly accurate" or "not very accurate"? Can your data values be 10% too low, for example? If not, how do you know?

July 2nd, 2017, 07:59 PM  #14 
Senior Member Joined: May 2016 From: USA Posts: 823 Thanks: 335 
Well I have tremendous sympathy with the student here. Apparently the "professor" did not explain about calibrating instruments, estimating experimental error, or the dangers of extrapolating far from the range of observed data. When you have an idiot for a teacher, you must expect rather confused questions from the student. The experiments were done around 0100 degrees Celsius, but the teacher demands a graph extending to absolute zero. The teacher is a fool, a charlatan, or both. I have had employees trained by such idiots. Fortunately, if you get to the victims early enough, quite a few can be rescued. Last edited by JeffM1; July 2nd, 2017 at 08:02 PM. 
July 2nd, 2017, 08:17 PM  #15 
Newbie Joined: Feb 2017 From: USA Posts: 28 Thanks: 1 
I wouldn't be too rash in your assessment of the professor. They are teaching students at a state college level, many of whom probably barely passed high school. The content is not complete nor too in depth for the abbreviated summer semester that the course is being given in. I do not count myself in this group. I happen to already have a bachelors in science and have done work in lab settings before. I recognize flaws in the methodology and limitations in the equipment. I just thought that producing a log plot would clean up the graph more. In the sense that there would be more room to view the given data points, why waste the space showing absolute zero, when the differentiation between the experimentally derived data is more important to graph accurately. I contacted him about this and he said strictly graph pressure versus temperature. I am not the strongest in math, but I am not afraid of it either I need to develop more skill in log, ln, e and the manipulations of such. Thanks again for the assistance. 

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data, equation, graph, highly, points, varied 
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