<p>im freaking out; was virtual, upright and magnified answer choice E?</p>
<p>For the PV diagram questions, was the horizontal bit constant pressure, downward vertical no work done/by, and the curve isothermal? I forgot to check the curve to see if it was actually isothermal.</p>
<p>I also put virtual, upright, and magnified, but I don’t think it was answer choice E. Of course I could be dead wrong and just not remember the answer choices well.</p>
<p>recycling i agree w/ all those, i checked and it was isothermal</p>
<p>@SheepLionWut were all the answers just one of the 3 choices? I didn’t have any combinations of the three.</p>
<p>For the water wave crest boat problem thing, it had no effect on speed:
“Wake patterns in water[edit]
Waterfowls and boats moving across the surface of water produce a wake pattern, first explained mathematically by Lord Kelvin and known today as the Kelvin wake pattern. This pattern consists of two wake lines that form the arms of a V, with the source of the wake at the point. Each wake line is offset from the path of the wake source by around 19° and is made up of feathery wavelets angled at roughly 53° to the path. The inside of the V is filled with transverse curved waves, each of which is an arc of a circle centered at a point lying on the path at a distance twice that of the arc to the wake source. This pattern is independent of the speed and size of the wake source over a significant range of values.”</p>
<p>Yes recycling, the only place pressure was constant was horizontal line, W=pv so only time 0 work was done was when v was constant, which was downward vertical, and out of the 3, the curve was the only one that had constant temp.</p>
<p>foolish i have no idea what that means but i’ll believe you</p>
<p>The last sentence 
“This pattern is independent of the speed and size of the wake source over a significant range of values”</p>
<p>What do you guys think the minimum raw score for 800 will be? The CB blue book has a test where 59/75 is an 800 but that just seems too generous…</p>
<p>Gosh darn it. I missed that one then.</p>
<p>I agree with @SheepLionWut with the thermodynamics. I did AP Physics this year (or technically last year since I’m out of school now) and if I learnt anything it was what those dam* things mean. </p>
<p>Does anybody remember what value of a charge increased as it entered a magnetic field?
The answer choices were gain acceleration, gain kinetic energy, gain potential energy, etc.</p>
<p>And if any of you used a review book like Barrons or Princeton, how accurate was it in accordance with the exam? I think I’m going to get like a 750-780 on this thing so I’m going to retake it in october</p>
<p>Gain potential energy. But for the boat question, I put not enough info to determine (choice E I believe). Is that the consensus? </p>
<p>@frostyy I believe it was electrostatic force? Im not sure on that one</p>
<p>@frostyy @UnathleticAsian I think the answer was potential…the field was uniform which would mean that force/acceleration are constant.</p>
<p>I agree with joppa if it’s the question i’m thinking off, it gained potential energy. The charges natural tendency would be to move to the left but it was moved further to the right, thereby increasing the potential energy. It’s like moving and object higher in the air increases its PE</p>
<p>I also said PE.</p>
<p>For the question on Quasars its definitely NOT the beginning of the universe (that was 13.8 billion years ago). I put something about large black holes and my friend agreed.
“These objects were called the “qausi-stellar radio sources”, or “quasars” for short. Later, it was found these sources could not be stars in our galaxy, but must be very far away — as far as any of the distant galaxies seen. We now think these objects are the very bright centers of some distant galaxies, where some sort of energetic action is occurring, most probably due to the presence of a supermassive black hole at the center of that galaxy (supermassive = made up from a mass of about a billion solar masses).” </p>
<p>Shame, shame.</p>