I am in the process of self study in Physics by going through some textbooks that I have (Classical Dynamics:Marion and Thorton, Electromagnetism: Pollack and Stump). I find myself having some conceptual difficulties and would like to pose my questions here on the forum, however the thought occured to me that it may raise eyebrows me posting multiple questions once. Is there a rule against this? Also, is there a way to PM admins? I would have not posted here if I knew a way to contact one for this question directly.