June 2006 - Physics

Test Preparation SAT Subject Test Preparation
181

<p>uhh im pretty sure its the frictionless incline.... the 1/2xt^2 descibes uniform accelerations. period is T, no doubt.</p>

182

<p>What was the answer for the slit experiment?</p>

183

<p>wavelenth and smaller slit</p>

184

<p>yes bec y=(wavelenth* L)/d</p>

185

<p>Dang! If I got that one and the motion equation one, I have 10 wrong and 3 skip. Man...</p>

186

<p>the decay one was 1/16 , right?...at least this is how I remember ...</p>

187

<p>darkruler, is this your 2nd time taking it</p>

188

<p>I got 6-7 wrong so far and skipped 2 but I am pretty sure I made more careless mistakes :(</p>

189

<p>i have about 5</p>

190

<p>No, first time. I might retake; I have good enough scores on my other SAT II's and SAT I. The problem is, we didn't learn optics, waves, thermal physics or modern physics in my class. I had to teach it myself. It kinda sucks.</p>

191

<p>I thought the amplitude question was about a spring. Was it a pendulum?</p>

192

<p>I am not hoping for 800 anymore..I guess I will have to retake<em>angry face</em></p>

193

<p>People said the May test was also weird but they seemed to get good scores..hmm we never know =)</p>

194

<p>i also tought it was spring....it wasn't???</p>

195

<p>Amplitude of a spring definitely affects the period:
Take this as an example: amplitude of a regular spring is doubled
F= kx
mg = kx
since amplitude is doubled
either k is halved or m is doubled
either way
period = 2pi * root(m/k)
plugging it in, new period is going to be root2 times the original.</p>

196

<p>anyways amplitude has no effect so T is T</p>

197

<p>Um... look in princeton review practice test 1 (or maybe it was 2). It has pretty much the same exact problem. Please note that I could be mistaken though, as I am only in physics honors, so my knowledge in physics is actually really crappy >_<</p>

198

<p>well..which is it now?</p>

199

<p>Hey guys, for the fractal question what did u all put? I put the crack in the ground... lol... so random</p>

<p>And for the wave being polarized twice in different direction, is the answer 0?</p>

200

<p>amplitude has no effect. you cant just randomly plug in x here and k there.</p>