<p>The pendulum one was for kinetic energy.</p>
<p>What about for the 4eV question?</p>
<p>It is longer time interval because it is the measure of time interval on earth, not in the spacecraft.
The length is to be shorter as measured from earth.</p>
<p>APushed: Oh, at max height the 2M has greater PE. At the bottom, they have the same speeds since the speed is independent of mass and the length of the string-pendulum is the same for both masses. As for the 4 eV question, I made one atom excited to 4 eV state and the other atom remains in the ground state. This makes sense to me based on what I’ve learned in Chemistry, but I don’t know.</p>
<p>Also, @HatersGonnaHate: it’s shorter length, longer time. Choice E said that. Sigh I hate these careful reading things. Sometimes you miss out on the correct answer all too easily. :(</p>
<p>can someone specify what exactly the “shorter length longer time” prob asked for? I dont remember that question or that answer choice</p>
<p>@independentstudy: Yeah, I only realized that right now for the KE question. 
Nevertheless, I am pretty sure about the answer for the photoelectric question because the equation for energy is E = hf - phi, where h is plank’s constant, f is frequency, and phi is a work function. I could be wrong…you never know!</p>
<p>In general, I felt this test to be time crunched. It isn’t that the questions are hard. It is more that there is not enough time. I skipped 6 and probably missed 4 or 5. :(</p>
<p>@APushed: Sigh. Yeah the time crunch kinda makes us forget important things. It ****ed me off… 48 seconds per question. Like whaaaat? I guess if you’re really on top of your material you can do it but I mean… for the rest of us mortals…</p>
<p>Err idk for the photoelectric one. I do know that equation but you might be right. No idea here.</p>
<p>I got the Lenz Law one wrong…sigh :(</p>
<p>What AP tests are you guys taking…</p>
<p>and where did you guys take the test? I took it in California</p>
<p>Ah man, Lenz’s Law. If you take Physics C there’s always an FRQ on the E&M part on that stuff. FRQ 3 usually too. So I’ve gotten used to it. But it’s a foreign concept in most intro courses. What kind of physics class do you take?</p>
<p>And I’m in New Jersey. California is pretty competitive from what I’ve heard from my cousins yo. And taking AP Psychology, AP Statistics, AP Physics C Mechanics+E&M, Macroeconomics, Microeconomics… and the June SAT I. This is going to be a very stressful next month. Sigh. I hate testing. How about you?</p>
<p>@APushed ah true true for the electron/work function one… i completely forgot to consider the work function, but your answer makes sense.</p>
<p>btw the one with the light rays going into/coming out of a box was a plane mirror, right?</p>
<p>skipped 2, missed 2 or 3 (and counting)</p>
<p>Wait that was a plane mirror? I initially thought that but wouldn’t the light rays just bounce off the mirror instead of going through? Err I thought it was a concave mirror but I’m definitely wrong. Shoot… #optixsucks</p>
<p>I said a diverging lens…kind of a guess but wouldn’t any mirror reflect light rays?</p>
<p>orientation though</p>
<p><a href=“http://i.imgur.com/pQplAP4.png[/url]”>http://i.imgur.com/pQplAP4.png</a></p>
![http://i.imgur.com/pQplAP4.png[/url]](http://i.imgur.com/pQplAP4.png%5B/url%5D){kind=link}
<p>(excuse the lame drawing)</p>
<p>i just wasn’t sure if the mirror had to be on the side of the box because it only works if it’s not on the side of the box. but it only said “inside” so i’m guessing that doesn’t mean the face of the box had to be the mirror</p>
<p>Oh crap I didn’t think they meant the mirror could be positioned anywhere…you’re probably right</p>
<p>I take Physics Honors. Doing AP Language and Composition, AP Calc BC, AP Physics B (for the thrill), APUSH. Testing is a necessary evil. :)</p>
<p>@solipsisme: Yes, it was a plane mirror.</p>
<p>Do you guys think 60 and up will be an 800?</p>
<p>@solipsisme: The plane mirror could be inside the box and LIE flat on the face of the box. It would yield the same result.</p>
<p>AH DANG I didn’t think about that positioning of the mirror. You guys are right, of course. Fail on my part. Nice picture @solipsisme.</p>
<p>APushed96: Honors Physics is AWESOME. Best class I had as a freshman. It’s the only reason I’m taking C now. AP Lang is crazy though. Good luck on that. 
Testing is… yeah necessary but horrible. Bleh.</p>
<p>For me, I have a strange mind. Why is AP Lang significantly EASIER than Critical reading on SAT?</p>
<p>ok thanks a million! sorry for being “that guy” who is like “i failed i failed!” and then does fine on most of them; it’s just that on practice tests i typically miss a ton to silly errors so now i’m permanently paranoid</p>
<p>@APushed96: You’re crazy dude. Haha I dunno… you might be the kind of person who’s good at the difficult analysis and slips up on the easy find-the-answer-in-the-passage? Who knows…</p>
<p>@solipsisme: Ah man it’s okay, I’ve been there. Practice tests are named aptly so; they allow you to make such mistakes so that you learn and don’t make them on the actual test. Good thinking with that optics box question. Like… teach me how to be creative bro. Sigh…</p>