<p>Wow you guys are really good at explaining this stuff.</p>
<p>Was the answer A, B, C, D, or E? I feel like I bubbled in either D or E…</p>
<p>can op delete “US” from thread title? cuz i can confirm that the international paper was the same (from experience :P)</p>
<p>@calistudent07 I think thats why I put there was no net charge on RS. But, again, the question seemed poorly phrased. </p>
<p>looking over the Giancoli Physics textbook I have theres a similar example,
“If a charged object - say negative this time - is brought up close to the metal object, free electrons in the metal are repelled and many of them move down the wire into the Earth. This leaves the metal positively charged”
This looks like the answer should be something along the lines of RS having a positive charge.</p>
<p>Is the international test normally the same or different?</p>
<p>Yeah it does come down to whether or not it was permanently grounded. @thesoxpride10 I did think it was at first, but I just thought it would be weird to permanently ground it for the sake of the question.</p>
<p>Does anyone remember what the graph for the maximum energy of photons emitted by a photoelectric surface or something like that was? IIRC it was one of the first questions.</p>
<p>@recyclingbin I believe it’s a straight line graph w/positive slope, intersecting the x-axis to the right of the origin… not 100% sure though</p>
<p>@SheepLionWut most of the time they’re the same</p>
<p>its a straight line that isn’t from the origin.</p>
<p>Guys, what you get for the candle behind focal point (concave mirror)?</p>
<p>Did anyone here use Barrons or Princeton? If so, which book was more accurate to tested material/ more realistic practice tests in comparison to the exam we took today?</p>
<p>It should be a straight line that does not start at the origin. You can google “kinetic energy vs frequency graph”. Pretty much KE=hf-work function. To even be released, the frequency must equal the threshold frequency to meet the work function. That is why the graph must start somewhere to the right of the origin. Otherwise, KE is directly proportional to f.</p>
<p>@idkName i think it was virtual, upright, and magnified? Don’t remember exactly though and maybe I read the problem wrong.</p>
<p>@calistudent07 @idkName I got virtual, upright, magnified too</p>
<p>@tamabombXD @calistudent07 @idkName what about frequency vs KE?</p>
<p>Straight line that does not start at the origin.</p>
<p>What was the rational behind the quasar question and beginning of universe? I put the universe thing as well but I was torn between galaxies and that.</p>
<p>@recyclingbin see my previous post
@foolish since the quasar light is 5 billion light years away, that means the light we are seeing today (from the quasar) must have originated 5 billion light years ago, which is (somewhat) close to the beginning of the universe.</p>
<p>@calistudent07 @recyclingbin Wait energy vs frequency is also a straight line? Wouldn’t it be parabolic? (this is another problem that appeared later in the test)</p>
<p>EDIT: damn I used the KE formula accidentally…two questions wrong</p>
<p>Which one was the candle? I got 30cm for one mirror problem. If it was a concave mirror, the candle would have been closer to the mirror than the focus for it to be virtual. Was this the case?</p>
<ul>
<li>we had the same test as this year lmao:
<a href=“May SAT II Physics Discussion - #241 by csk90 - SAT Subject Test Preparation - College Confidential Forums”>http://talk.collegeconfidential.com/sat-subject-tests-preparation/1143312-may-sat-ii-physics-discussion-p17.html</a></li>
</ul>