fluid mechanics ; material and energy balances

Well, I will take these two subjects for the 2nd semester and I'm afraid to take this subject because compared to the 1st semester, PChem and Ochem, I already have taken this subject when I was in LMC. So, it is not a problem for me because what I only have to do is just try to revise back everything that I have learnt two years ago and I didn't manage to remember it all because it was two years ago. Haha.. I know fluid mechanics and material and energy balances will be the toughest subject ever for the 2nd semester, I will take this as challenge. I like to challenge myself. How about you??