Official Nov. Physics Thread

Test Preparation SAT Subject Test Preparation
61

<p>More questions I can remember.</p>

<p>Potential difference across the two resistors = 3V
The two planes = Northwest
Specific heat of some substance (2000 J/kg*C)
Reason for the temperature being closer to 20 (water has a higher specific heat)
Galileo = It was D (Can't remember the choice)
Magnetic questions at the beginning; I think the first one was C (moving parallel to the field lines), and the next one was D (Right hand rule gave down, was an electron so it was up)
Capacitor question, electric field was V/d</p>

<p>Can anyone remember anymore of the I, II, and III questions?</p>

62

<p>wow i think i remembered the right hand rule wrong but i still got the same answers?</p>

<p>i did fingers point in direction of the magnetic field, thumb is the initial velocity....palm shows direction of the resulting force.</p>

<p>seems like it still works out lol. thats amazing</p>

63

<p>Well it should've worked as long as you made sure you were dealing with three parallel axes. I think on that question, or particle was moving to the right, and the field was out of the page, so if it had been a proton it wouldn't went towards the bottom in the plane of the page; the question asked about an electron, so it was up.</p>

64

<p>i think it was 0.025m?</p>

<p>i agree.. it should be the asteroid.. i got it wrong then..</p>

65

<p>Damnit you're right about the optics question; I made an error in the math because I couldn't use a calculator... argh.</p>

<p>It was 1/(100)+1/(di)=10</p>

<p>1/9.99 or .1 = di</p>

<p>so -di/do = .1/100 = .001</p>

<p>.001*25 = .025</p>

66

<p>Do you remember any more questions? Like the I, II, or III's? That's like three easy questions I've screwed up (Maybe more). Fractal thing, radiation/convection and that optics Q. On the last question, do you get E? and on the object moving distance d, work done by the force = I and III only? (Kinetic energy and whatever III was, but not mgd)</p>

67

<p>Yeah its KE only.</p>

68

<p>I don't think it was KE only. I'm pretty sure it was I and III, KE and something else (I think it was Fd), then the other was mgd.</p>

69

<p>^Seconded...</p>

70

<p>can a raw score of 63 and + give a 800?</p>

71

<p>Bohr's model - i put E (all 3...i know two of them is right for sure and the third sounded right)
Fractal - was it brocolli or insect?
What about that one with the particle heading towards a plate, it was positive on the top and negative on the bottom and it could head top/bottom and circular/parabolic - what was the answer</p>

72

<p>raw score 63 should be 780-790</p>

73

<p>Bohr's model? What were the options on that question?</p>

<p>And about the particle, I <em>think</em> it was an electron, and was towards the top and parabolic (constant acceleration in one dimension)</p>

74

<p>^Agreed.</p>

<p>What I mean about the work problem was it was KE and Fd but not mgd because it was on same height and the PE doesnt change.</p>