Does the spring constant of a piece of rubber affect its rate of cooling constant 'k' ? 1) Is there any formula, any proven relationship? 2) If there isn't, would investigating it make any sense? Or would it end up being a waste of time as the two variables are totally unrelated? Is there a possibility of a relationship between the two. 3)I am not sure, but when I asked this to someone, I was told to read something about hysteresis (don't know if I spelt it right!). What is it? I couldn't understand anything I read about it? And could it possibly answer my question?