Please, take this question seriously, because this is a real problem to me. I have a door in my flat. A closet door, to be specific. And there is a problem with it.
In the summer everything is ok, the standard wood door opens and closes as predicted, but in the winter time it drives me crazy! It just won't close! Seems that it doesn't fit where it belongs. Damn door just doesn't allow me to welcome guests and take a cup of mulled wine with them.
So the question is, what physical processes are standing behind that unfitting? I believe that sun and gravity may be involved, but I don't really understand it. So, please, help. If I'll know the problem, I'll figure out a solution.
P.S Maybe it is important that I live in Kazan', Russia