<p>Texas...how did you solve this one...i keep on getting 1/3 (pi^2) L....</p>
<p>...since the pendulum rule is T = 2(pi)(I/mgd)^0.5....with I = 1/3 mL^2 and d = 0.5L..</p>
<p>..resulting in a time of t = pi(2L/3a)^0.5</p>
<p>Does anyone know when the semifinalists for USPhO will be announced?</p>
<p>Tests have to be postmarked by the eleventh of february, so I would assume a few weeks after that. To the best of my knowledge, your teacher can give you the score he got when correcting it after the postmark deadline passes. This should at least give you a rough estimate of your chances.</p>
<p>what were your guys scores on the physics olympiad test? My teacher said myself and 4 others from our school probably qualified given grading curves from past years.</p>
<p>How big are these curves?</p>
<p>my teacher says i got a 75... but i thoguht i got around mid 80s - low 90s. ah well. </p>
<p>when do we find out about semis? soon i hope so i can start cramming some e/m if im lucky</p>
<p>Ouch. I only got a 70. Far lower than I was expecting. Do I still have a chance at making it or should I forget about preparing for the next exam?</p>
<p>I got a 45 (18+27), which I'm happy with (first year physics student.) </p>
<p>Whens a good time for us to discuss the problems? I really want to find out how to solve the other three free response problems.</p>
<p>hello guys!</p>
<p>Please can anyone give me a source of past questions of the US PHo?</p>
<p>An internet link or e-mail be do quite fine.</p>
<p>Thanks.</p>
<p>they had to postmark today, so i think its ok... but then there might be some special cases in which people haven't taken them yet, so maybe in a little while?
the free response actually werent that bad.</p>
<p>70 might just make it...I would prepare for the next exam anyways...regardless of whether you make the next round or not, the Physics you would learn in the process would be benificial for college, and most likely your future career.</p>
<p>as for the car question, i think t = 1/4 T
so its like pi/2 sqrt(2L/3a) and then using kinematics gives 4/3 pi^2 L
hmmmm but texas got 3/4, so idk, hes probably right though</p>
<p>wait....which one are you talking about? texas? idk?</p>
<p>Um, how do you actually prepare for the next exam? Is there specific material?</p>
<p>prepare for the semifinal exam by working through some from pervious years. Avail at:
<a href="http://www.compadre.org/psrc/evals/olympiad.cfm%5B/url%5D">http://www.compadre.org/psrc/evals/olympiad.cfm</a></p>
<p>When and how do we know whether we made it?</p>
<p>What are you guys going to mainly study? The next tests look insanely hard, I don't even know where to begin...</p>
<p>Study from a Physics textbook. Test covers mechanics, E & M, waves, optics, thermo, and some pretty basic relativity stuff. I suppose studying this stuff now for this test would be pretty hard if you don't know it already. Just work on the practice tests and try to get the best score you can with what you know and hope the other people don't know it either :)</p>
<p>Dang, I've had the equivalant of 3 years of high school physics and I could have totally owned these tests. Too bad I didn't know about them or else I'd probably be able to get past the semi-finals.. Shucks.</p>