<p>Yoshi729: Thanks for your reply. I heard many times that AP Physics C is the hardest exam ever... I'm only using Princeton Review's book and I have no math and physical background you mentioned, though I'm concurrently self studying AP Calculus BC. I'm spending about 9 hours on AP Physics C every week, going over the PR book and solving problems on the back of each chapter. I don't read or have a Physics textbook; I sometimes use online lessons only when I totally get lost. Would the chance of getting a 5 on AP Physics C M&EM exam be really low for someone like me? I don't want to take a risk when there's no certainty that I will do well on it.</p>