SAT Physics June 2012

Test Preparation SAT Subject Test Preparation
161

<p>Heres the Scale from a released test from Collegeboard:</p>

<p>Score is out of 75</p>

<p>75-59: 800
58: 790
57: 780
56: 780
55: 770
54: 760
53 750
52 750
51 740
50 730
49 730
48 720
47 710
46 710
45 700
44 690
43 690
42 680
41 670
40 670
39 660
38 650
37 640
36 640
35 630</p>

162

<p>katniss // for the inteference one, the question asked for minimum inteference so it’s the other two 5,5 and 6,5</p>

163

<p>Baneling – Many people are still confused about that one. The exact wording asked for the least disturbance. We’re assuming it means “disturbance” as in disturbance of the electromagnetic field, so it would be destructive interference.</p>

<p>@katniss Numbers 3 and 4 are wrong. I don’t remember the exact numbers, but 2 and 5 can’t be the least current because the first and last ammeters should have the least current. See <a href=“http://i.imgur.com/lzapA.png[/url]”>http://i.imgur.com/lzapA.png&lt;/a&gt;&lt;/p&gt;

164

<p>@Baneling: Well, with those two, there’d technically be just as much interference as with 5 and 6.5… just constructive. So I’m pretty sure that’s not what the question was asking.</p>

165

<p>How was the answer to the rotating drum experiment speed?</p>

<p>I saw the drum as a single slit diffraction experiment, which could be used to find the wavelength of the particles based on how they interfere (the target area was dark, perhaps indicating destructive interference).
The wavelength could then be used to find the momentum of the particles, using lambda=h/p.</p>

166

<p>The way I thought about it was that since the diameter of the drum, the angle of the detector and the slit, and the speed of rotation was known, the time it took for the particle to travel the diameter of the drum was equal to the time it took for the detector to rotate to the position directly across from where the slit was at t=0 so that the particle would strike the detector. Something like this:</p>

<p>t=d/v
s=r<em>theta=d/2</em>theta
t=s/w (omega: angular speed)
d/v=(d/2*theta)/w
v=2w/theta</p>

167

<p>^lol
what did you guys get for the red stop light one?? :(</p>

168

<p>i think for the red stop light one i put the answer something along the lines of the covering is made of material that absorbs all wavelengths of light except red? this test sucked… i guessed on like half… i so sad :(</p>

169

<p>So bumping this up. 800 on physics. u guys?</p>

170

<p>800 wooo, sucks everyone else is unable to access his/her scores</p>

171

<p>800 yo! Really glad I saw it earlier, I’d be freaking out right now otherwise.</p>

172

<p>Woohoo 800!</p>

<p>Seems like the site’s down. I crawled up early in the morning to check today, haha.</p>

173

<p>Woot, 800! :)</p>

<p>Lol, did everyone pretty much get an 800?</p>

174

<p>Can you find out how many you got right/wrong and which questions for the Physics SAT-II?</p>

175

<p>CB doesn’t release any kind of info about that unfortunately.</p>

176

<p>800 for Physics!! :D</p>

177

<p>What did you guys use to prepare for the Physics test? Did a lot of you use Princeton Review? I bought that one. Or should I buy another one that you think is better.</p>

<p>Also, do you guys know of any YouTube channels that can help with physics subjects (something like Bozeman Biology or Khan Academy, but for physics).</p>

<p>Gracias! :)</p>

178

<p>@myraven I got an 800 on this June test, and I used PR for the practice tests, and thought they were pretty good, but I did not really look at the review sections; I took AP Physics B, where I learned most of the topics on the subject test. The big college board book of SAT subject tests is also ok for its one real physics test.</p>

<p>You said you want a YouTube channel for physics help like Khan Academy; why not Khan Academy itself though? It looks like there are 100+ videos of physics topics on there [Physics</a> | Khan Academy](<a href=“http://www.khanacademy.org/science/physics]Physics”>Physics library | Science | Khan Academy)</p>

179

<p>^^ Yepp I bought princeton as well. I did decently on the practice tests there but they were harder than the real thing (IMO). And I also took physics B like this guy. I also checked out sparknotes and took their tests-> the tests aren’t so accurate scoring wise but they are great practice.</p>

180

<p>770…:frowning: That’s what I get when I go to a school that doesn’t teach magnetism.</p>