Equations on OAT

You'll have to take your best guess like everyone else. The OAT is a general test, if you focus on the most important equations you will probably be fine.
 
I think if you know the equations that are covered in Kaplan, you should be fine. The thing is, the physics section really is more conceptual, where you have to know why something happens the way it happens, rather than plug and chug equations. I found that by doing Chad's Videos and the associated quizzes a lot, I just intuitively knew the equations without having to go through the stress of "memorizing".
 
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