May SAT II Physics Discussion

Test Preparation SAT Subject Test Preparation
161

<p>@Abroyo, physics scale is superb!! remember, and i mean this seriously, the difference between a 750 / 800 is nothing (at least IMO)… think about it</p>

162

<p>did anyone get a graph that had a positive slope but didnt start at 0,0, more like +x, 0 for the photon question?</p>

163

<p>Isn’t velocity tangent and acceleration pointing straight down?</p>

164

<p>Yes, that’s correct, zkaplove17.</p>

<p>@skepticidal:
I know the scale is super generous, but on the official practice test I only got 760. So that coupled with a hard test and possibly skipping a whole page . . . not good!</p>

165

<p>Andy, it is in a circular orbit… but thats because remember F = ma (vectors: F and a)…</p>

<p>F = Gmm/r^2 (the direction of the force is towards the massive object…) therefore the a pointed towards the “massive” object as does the Force… (if it was center, it would be a circular path)</p>

166

<p>the acceleration was due to the gravity of the sun</p>

167

<p>I posted a curve earlier, is this legit
<a href=“http://stashbox.org/96648/SAT%20II%20Physics%20Score%20Conversion%20Table.pdf[/URL]”>http://stashbox.org/96648/SAT%20II%20Physics%20Score%20Conversion%20Table.pdf&lt;/a&gt;&lt;/p&gt;

168

<p>The only force acting on the comet was the gravity of the sun, and its direction was directly toward the sun, so the acceleration was as well.</p>

169

<p>zkaplove, the threshold frequency question, it needs a minimum x value (i don’t even remember what this means becaues i’m in physics C, but i remember looking at the graph in practice test ;x)</p>

170

<p>Wait, why is snell’s law wrong for the realtivity question? Doesn’t it show that light travels faster through vacuum than in any other medium?</p>

171

<p>no ur curve is not legit, its sparknotes curve which is 10 million times as hard, so that it prepares u, in the past its usually about 60/75 = 800</p>

172

<p>@zkaplove17, that is what I got, as for photoelectric effect, x-intercept is the work function, and the slope is h=6.636 x 10^-34</p>

173

<p>@Andy, the curve is legit…</p>

<p>it’s a standardized test so the curve does adjust 1/2 raw points per test, but it should give u a +/- 30 range (maybe less since it’s physics)</p>

174

<p>Oh in that case what would be a min for 700?</p>

175

<p>skepticidal, for the threshold frequency, thats exactly wat im saying, basically im saying the graph looked like y = x -2, but just in the first quadrant</p>

176

<p>Was the sun at the bottom? Because I think I put velocity to the left and acceleration down.</p>

<p>Seriioussly don’t remember this relativity question. Anyone remember the other options?</p>

177

<p>The acceleration of the comet is NOT towards the sun. The CENTRIPETAL acceleration is towards the sun, but there is TANGENTIAL acceleration due to velocity changes in elliptical orbit. Thus, the NET acceleration is to the bottom left. I remember getting a question like this wrong on a Physics C test.</p>

<p><a href=“http://library.kiwix.org:4201/A/Centripetal_force.html[/url]”>http://library.kiwix.org:4201/A/Centripetal_force.html&lt;/a&gt;&lt;/p&gt;

<p>Go here, and search “figure 5”</p>

178

<p>@garfield: [why</a> is light’s speed the fastest speed? [Archive] - Physics Forums](<a href=“Why is light's speed the fastest speed?”>Why is light's speed the fastest speed?)</p>

179

<p>u guys gotta be kidding me, 66 for an 800, ik for a fact that on the easiest physics tests its 63/75, never in a million years 66</p>

180

<p>Mid 40’s = 700ish</p>