A 0. 140-kg baseball is thrown with a velocity of 27. 1 m/s. It is struck by the bat with an average force of 5000 n, which results in a velocity of 37. 0 m/s in the opposite direction from the original velocity. How long were the bat and ball in contact?.

It depends on the subject for me. some exams are easier than others so i usually go through it and answer questions i know based on my general knowledge, then double check after. going through the lesson can a lot  because the exams can be  very lesson-specific, but sometimes they are ridiculously long so a lot of people don't take the time. i did find that, when i went through the lessons, i was making 100's on my exams vs strictly using + the internet and  i make 90's. 

For the sat there is a reading test, math test, and a writing and language test. the act has social studies and science tests.