Hi, I am halfway through my 3rd Year studying Physics and am finding that the difficulty of the course has increased dramatically. For example, a 15 lecture course in the first two years would take about 30-50 hours of study to get to a high level of understanding (a comfortable A). Compare to, for example, a 15 lecture course on Electricity and Magnetism I am currently studying. I have put in around 60 hours work already and although I feel like I am starting to develop a good feel for how everything fits together I am nowhere near confident in answering the full range of exam style questions. It feels like I'm going to have to work all day every day to get to where I want to be across all courses once lab time and projects are added in. It's worth noting that I like to be able to follow every development in lecture notes and textbooks in order to really understand how everything works. Is this an attitude that is going to prove impossible to satisfy in these higher level courses? Basically I want to know, is it supposed to be this hard, because I'm stressing out?