official AP Physics B 2011-2012 thread!

<p>hooray…some consolation after i bombed the last half of #7 and possibly bombed the fluid/tube one haha</p>

<p>I got 5, because i made the mistake of misplacing negatives. Make sure all of the negatives are correct, indicating direction.</p>

<p>for the 1.5kg one? also what did you guys get for the density of the oil…i got like 890 something</p>

<p>5 was correct for part a. Yeah I effed up 7… I’m not sure about the tube one, I think I got d wrong but got c fa sho; cause I put below and my teacher confirmed that one today, too</p>

<p>I got 900…what method did you use, I’m not entirely sure mine was correct</p>

<p>yeah i’m pretty sure I totally screwed that part up with the boxes you had to check on the tube one… i thought they would remain at the same level. Oh well, with some extreme luck I might be able to pull off a 5 on this thing</p>

<p>i got like 894. I like found the mass of water and figured the mass of the oil had to be the same or something I can’t remember exactly</p>

<p>I put that they would remain at the same level for d…poops. Yeah, I reeeeeally want a 5. I didn’t feel too bad about free response, multiple choice worries me more honestly.</p>

<p>@blondeonblondesm I think that the answer is 3, not 5. I got the answer 5, but that is because I made a mistake.</p>

<p>i used d=m/v and had to do some funky conversions to change the cms to meters to work for everything</p>

<p>i just set density<em>h=density</em>h (g’s cancel out) because I thought pressure would have to be the same at both heights…argh idunnoooo</p>

<p>yeah seriously I guessed on about 80% on the magnetism mcs…there seemed to be a lot of those for some reason it really ****ed me off</p>

<p>are you talking about part a? well 894 is not too far off from 900 so…</p>

<p>@robwashere…are you talking about b or c?</p>

<p>@tdk123 yeah talking about a</p>

<p>@blondeonblondesm Im talking about c</p>

<p>we were talking about how we got 3ish on that one and 5 on b</p>

<p>Oh!!! I’m sorry :P</p>

<p>So can we go over number 4?</p>

<p>a) straight line passing through (0,0)
b) see post 246 for my answer
c) post 247</p>