SAT Subject Physics Kaplan vs. Princeton Review

<p>I got both prep books because I really want a high score. Even though I didn't score perfectly on Kaplan at first, after reviewing the material and reading through the book/learning some new material, I got a 780 (made lots of stupid mistakes, I think should've been 800). Anyway, as I was reading Princeton Review, it just seemed a hundred times harder and even covered many topics Kaplan did not at all (ex. harmonics, complicated equations that you wouldn't think you would have to know like f=1/2pi times sqr root g/L). And now I'm freaking out because even though I haven't tried a PR test yet, I feel like I'm gonna get a horrible score. I know people have been saying that PR is good and that it is close to the real test, but it seems so hard! Will the real test be like that? And also, if we need to know all the material on PR, why does Kaplan even freaking exist! It has a hundred times less stuff in it that PR!</p>

<p>Bump i hate princeton review please someone answer</p>