<p>Barrons failed me on this exam. Those tests were ridiculously easy compared to this. I hope I can rely on the blue book curve for this test… it was just as hard as the October one. How good do you guys think a score of 720 is?</p>
<p>^ just wondering, what’d you get on the October one?</p>
<p>A 720, got wrecked.</p>
<p>haha damn, better than me, I got a 700 with like 13 omitted, probably like 10 wrong, gg… XD</p>
<p>lol I omitted 17 this time, but hopefully I got the questions I did right. I know I got like 3 wrong so far though. That’s why I’m so fanatic about the curve xD
What did you guys get for the restatement of the second law of thermodynamics?</p>
<p>what the choices ? i think i remember one was heat transfer from hotter place to colder place</p>
<p>[Laws</a> of thermodynamics - Wikipedia, the free encyclopedia](<a href=“http://en.wikipedia.org/wiki/Law_of_thermodynamics]Laws”>Laws of thermodynamics - Wikipedia)</p>
<p>The second law is that entropy increases. Not sure what the answer was, as I didn’t answer it.</p>
<p>gahhh, I put the heat transfer one, I forgot that efficiency of machines is part of the second law, too :(</p>
<p>this time I omitted 7, about 5 wrong so far… agh…</p>
<p>i skipped 13, according to the blue book, i can get up to 14 more wrong to get a 700 since a 45 raw is a 700</p>
<p>Speaking of efficiency, can anyone verify that W = Q1 - Q2 and that the efficiency of the machine is 25%?</p>
<p>^ I’m pretty sure that that’s right… I don’t know how I’d go about verifying it though haha :)</p>
<p>anyone knows what happens to the electroscope when a grounded copper wire touches it?</p>
<p>@charizzard : i think the heat transfer one is correct. I remember reading carefully about the efficiency of the machine , it says it is possibile to create a 100% efficient machine which is clearly not a restatement of the second law </p>
<p>@bravosix : yes i got W = Q1 - Q2 and 25% too</p>
<p>@jumptershoot : the two plates of the electroscope will then be in the normal state (vertical i think) since all the charges will go through the wire down to the ground which makes the plates become neutral</p>
<p>@Jerrick, really? but I don’t think the second law really says anything about heat transfer either… does it? :</p>
<p>@ Char
“The second law of thermodynamics is an expression of the finding that over time, differences in temperature, pressure, and chemical potential tend to equilibrate in an isolated physical system”</p>
<p>I think the heat transfer one is right.</p>
<p>oh thank god! haha yay :)</p>
<p>does anyone remember the one where we need to choose two quantities to figure out how much a springe (horizontally on a wall) will compress when an object runs into it? I think I guessed like momentum of the object and initial force provided by the spring.</p>
<p>^ I put… maximum elastic potential energy and initial kinetic energy? I think? was that an answer choice?</p>
<p>I also put maximum elastic potential energy and initial kinetic energy , hope it’s correct</p>