<p>what was the concave lense over a smooth mirror question about?</p>
<p>The answer to that question I'm pretty sure was that the normal, incident, and reflected rays are in the same plane. If you just draw a picture, I think you would see that. Since I was reading the test very quickly towards the end, I also saw that the answers were similar. I remember that the other close one was that the mirror, incident, and reflected rays are in the same plane. This is wrong because the mirror is perpendicular to the incoming rays. But once again, don't take my word for it since that test stumped as it did everyone else.</p>
<p>Fractal</a> Mud</p>
<p>this says that mud is a "natural fractal", but really, why was there a question on fractals?</p>
<p>Also, what did you guys say for the one where there was a weight tied to one end of a string and we had to find what instrument could be used to find the length of the string. I said a protractor, but it was a guess.</p>
<p>Daaaaammnnn it. I guess I did not read that carefully. Hahah, there goes my chances for an 800.</p>
<p>Wow owned again. That test really sucked. When did anyone here ever come across a topic involving fractals.</p>
<p>i agree, that fractals one was ridiculous. the weight one on a string was a pendulum and to find the length you need a stopwatch to measure period (then u can find length).</p>
<p>never did before in practice test. For those who took the physics course: did you guys cover that in class? or we're expected to learn it on our own anyway.</p>
<p>haha i knew that fractal question!! woot!!</p>
<p>was 4 eV an answer, anyone?</p>
<p>I put "a stopwatch"</p>
<p>yeah 4ev, stopwatch is right too</p>
<p>i got those two answers too. was 3600 ever an answer? i forget the units... it was either volts or coulombs</p>
<p>y is a stop watch right? I know if you cut it, u will be able to find how high the weight was, but not the length of the string. If you had a protractor, maybe you could measure the angle from a certain distance to the top and use trig to solve for height. I am not sure though</p>
<p>Is it just me--or was there wayy to much stuff on charges (electromagnetism, etc.)??? After taking AP Physics B and feeling pretty confident on the AP exam-this test completely blew me away. <em>sigh</em> and this was the test I was MOST confident about...goodbye, 800</p>
<p>period = 2*pi * sqrt(L/g)</p>
<p>if you know the period you know the length.</p>
<p>Yeah, I got 3600 C</p>
<p>can we maybe try to do an actual list of all the problems we remember/what is the most likely answer? instead of focusing on just a few difficult problems like the fractal one</p>
<p>Not recognizing what the word "protractor" meant, it was hard for me to get that question >.<</p>
<p>I put protractor, but this is why it is wrong. The question stated that the top of the building was not visible hence you cannot use the protractor.
Anyone know the answer about the lens on a plane mirror and the diffraction pattern created?
I said the answer was refraction but I was not positivie.</p>
<p>I'm in IB physics and thought that the IB physics test was about 10X easier than the SAT II. I will be happy if i got a 650 on that...wow</p>