<p>Hey guys, do you mind sharing what books you used to prepre for the physics exam and whether you would recommend it? I’m an intl students so I’d be self-studying parts of it so any good books that teach you the concepts if you havent leanred it @school? Thanks and good luck for 21st May.</p>
<p>^wait so was one of the choices for that question that it would change the color??? darn it…i picked the one that said stuff would stay the same</p>
<p>yeah i think the color changes… when the wavelength increases, the frequency decreases, and so the color shifts towards the red end of the visible spectrum</p>
<p>what was the field w/ a positive plate and negative point charge?</p>
<p>^^^^the electric field lines went up and then converged at a point. (This is NOT mom answering the question, but S#2 who took the test. ;))</p>
<p>Not sure if this was addressed earlier, the one at the end with the velocity of the block moving from side to side by two springs, is that graph supposed to be pointy or non-pointy?
And for the positive plate perpendicular to the page and the negative point charge on the plane of the paper, the arrows were supposed to go upward in the page right?
And … um, does anyone remember the one with the ice, water, and water vapor together in one container? and what happens to it within time?
And does anyone remember the one with the radioactive decay/activity rate one? The half time was 10s, total time elapsed 40s, and the initial activity ~2000ish.
Hmm. what else… the one with the center of gravity one, which point was closest?
There was one about the first law of thermodynamics, I believe.</p>
<p>the decay one was 160
the center of gravity one was C, i believe. the only one in the I quad.</p>
<p>For the block between two springs, the graph is supposed to look like a sine wave, so non-pointy</p>
<p>For the positive plate and negative point charge, the arrows should go up and then converge at a point, as momof3sons said</p>
<p>For the ice, water, and water vapor, I said that after a long time they all reach the same temperature</p>
<p>I put 160 for the radioactive decay one, but I was a bit confused about how half-life affects activity as opposed to the amount of substance remaining, so I probably got this one wrong</p>
<p>For the center of gravity, it was the one in the first quadrant, i think C</p>
<p>The laws of thermodynamics was the question about the car engine… I put that the amount of heat exhaust could not be zero, which (i think) follows from the second law (systems always tend towards higher entropy, so an engine can never operate at maximum efficiency)</p>
<p>What were the choices for the decay one?</p>
<p>Hey, two questions, one, how hard is the phys sat compared to the california star physics test? And two, is it curved and if so, by how many problems?</p>
<p>the physics SAT is curved pretty generously. usually, you can either leave 15 blank, or get 11 or 12 wrong and still have an 800.</p>
<p>how about the question about the mirror and lense…not sure… there was a picture of lights going through some device and we have to guess which device it is…the answer choices were converging lense, diverging lense, concave mirror, convex mirror, plane mirror</p>
<p>^plane mirror
i sense a paradox here…this test is so easy(as in completely conceptual based) that it was very hard…=/
i mean, i was prepared to do hardcore calculations and work with formulas but i was disappointed to see that all of the questions were conceptual based…=[…i was too accustomed to the calculation type questions in the princeton review…
haha i could probably do much better on the ap physics b test than the sat subject test in physics</p>
<p>For the matching, what did u guys get for the questions on electricity and magnetism? </p>
<p>Also there was a question on velocity and acceleration and u had to compare how they were similar, and the choices were -they are in the same direction, -they have the same magnitude and so on. Does anyone no the answer to that?</p>
<p>I also completely guessed on the questions on why red light is bent less than blue light in a prism and why microwaves don’t cause the photoelectric effect… i did no the answers to these questions on the test day, but the answer choices weren’t straightforward, so i ended up guessing =/</p>
<p>page-d…i put they are in the same direction for vel and acc question
and… for red light… i put something about refraction?? i dont remeber this one…
and for photoelectric, i put the energy is not enought for causing the process…i am pretty sure about this one…</p>
<p>sat physics is harder than ap physics c which i will take 2 weeks later…
i usually got 10-20 questions wrong on practice tests(collegeboard, barrons, tpr, sparknotes), but i think todays test was little bit easier for me …but still hard…</p>
<p>So you think what is the best book to prepare for June test?</p>
<p>@Page-d: I think the answer was that the vectors were in the same direction.</p>
<p>For the photoelectric question, I said something about the work function?</p>
<p>Yea, the velocity and acceleration were in the same direction. And for the photoelectron question, I also said that the energy wasn’t as big as the work function so there were no photoelectrons emitted. </p>
<p>I thought it was hard! My teacher failed to teach us concepts, so I would’ve definitely preferred more calculations…</p>
<p>whykwon: i completely agree. I’ll be taking Physics B, but the SAT seems to be harder in a way because it tests very conceptual things that just require you to know the fundamental equations and relationships, something that most AP classes don’t highlight.</p>
<p>^^^I agree, I’m taking Physics B too. This was surprisingly tough.</p>