2010 AP Physics B Discussion Thread

<p>Hiya everyone!</p>

<p>The AP exam for Physics B is this Monday, so I figured I'd create this thread for anyone who wants to do any last minute cramming/review.</p>

<p>Post any questions/answers/tips regarding the preparation for exam here!</p>

<p>I'll start us off...</p>

<p>1st law of thermodynamics:
W= Qin + W(onto) (differs from the conventional/textbook formula: W=Qin - W[by sys])
W(onto)=Work done on the system</p>

<p>How does Right hand rule work for magnetic flux?</p>

<p>anyone got released? i got lots to tradeeee.</p>

<p>The right hand rule is just the cross product.</p>

<p>wow this is really sad. im taking the exam on monday and that looks like another lang lol.</p>

<p>any tips for vector addition on electric charges?</p>

<p>I am not going to study lol, like charges repel, unlike attract. That's all lol</p>

<p>Why did I sign up for this exam if im not even taking the class..</p>

<p>I am taking the class, but we don't do ****, I just cram before the exam lol</p>

<p>yeah i havent done anything since prob october lol. im just wiging it and hope i get a 3/4</p>

<p>What are the conversion factors for the multiple choice/free response, like what you multiply your raw score by? And does anyone know the cutoffs for each score?</p>

<p>It's unfortunate that colleges don't give credit for this exam.</p>

<p>I've got test prep books, but they don't scale the score. I don't know if I'm scoring in the 3 range or the 4 range. Anyone know a source for a practice exam that actually scores the exam?</p>

<p>Yeah, it's quite a beautiful exam despite its exclusion of calculus. Especially with its involvement in Thermodynamics and Optics.</p>

<p>Fluid Mech and Nuclear Physics, don't forget</p>

<p>Usually 60% < is a five and like 30% < is passing...so there you have it.</p>

<p>Here's two formulas</p>

<p>Magnetic Flux = BAcos(theta)
B = ((mu)(I))/ (2piR)</p>

<p>And here's a question (which I made up --- didn't want to put copy-righted material up)</p>

<p>Which of the following is constant for a ball attached to a string undergoing uniform circular motion with constant speed?</p>

<p>I. Acceleration
II. Velocity
III. Magnitude of the force</p>

<p>a. III
b. I, III
c. II, III
d. I, II, III
e. none of the above</p>

<p>Not to mention its coverage of Waves(not just the EM type covered in Physics C)</p>

<p>Yeah, it's a more thorough course...it should be worth more.</p>

<p>III. Magnitude of the force</p>

<p>A</p>

<p>Good question</p>

<p>Alright guys. I have this test on Monday, and I signed up for Physics Honors at the beginning of the year for an elective. I signed up for the AP test because the teacher said it was easy, but I'm quickly finding out it's not. I am not prepared at all for this. We are just starting to learn about optics in class, and I have not been paying attention really throughout the whole year.
I have the Princeton Review, borrowed from a friend, should I take notes on it and study really hard tomorrow? Would I have a chance for a three? I heard the first section is like 70 MC with no formula references? So does this mean it's more conceptual, or do you just have to know key formulas? Sorry for all the questions, but I'd really like a response. Thanks.</p>

<p>Does anyone have a review sheet?</p>

<p>hmm if you understand everything before optics completely then yea u can definitely get a 3 maybe even a 4. Remember that optics is only 10% of the whole thing and modern physics is 10%.....sooooo all in all if u study for even a day ull probably get half of the questions right from each and ull be good
first section is 70 mc with no sheet, but Free Response does have a formula sheet
you DO have to know key formulas. especially for you cause u havent been learning alot. so if u jus memorize formulas now and understand what they mean u can get a lot more questions right</p>