1. The problem statement, all variables and given/known data A very simple problem, but part of an assignment regarding heat flow. The question is: A 15 cm rod is insulated at one end, the other is in contact with a reservoir of temperature 37C. By thinking of the physics, after a long time, what is the temperature at the point 5 cm and 10 cm from the insulated end? 2. Relevant equations None 3. The attempt at a solution So I will say that I was sick for a while and missed a week of class. I've been catching up so I'm somewhat familiar with things. Obviously this question is very simple, but I have been thinking of the following questions: What does "insulated at one end" mean? It is 0 C? Does the reservoir stay at 37C forever? If so, then after a long time, the entire rod would be 37C. This is probably not the case. If the reservoir transfers and loses it's heat, then after a long time, the rod will reach a uniform, final temperature. This, however, depends on the temperature at the other "insulated" end, doesn't it? Or would the temperature distribution be 12.333 C at 5 cm, 24.666 C at 10 cm, and 37 C at 15 cm? Basically, since I missed some class, I am unfamiliar with some of the basic ideas that most students would have been informed about in class. So how do I figure out (by "thinking of the physics" as opposed to calculating) what the temperature will be at various points, given the information above? Thanks in advance for any help.