SAT 2 Physics Thread

Test Preparation
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<p>what was the 2 spring projector back and forward answer?</p>

22

<p>Isnt it the switch that makes the voltmeter in series with the circuit?</p>

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<p>-Picture with two springs with the ball going back and forth: When's the upward force greatest? I put the second distance they gave us, whatever it was..</p>

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<p>Would the force not be the greatest when the spring is compressed the most? F=kx...</p>

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<p>so what do you guys think the curve is gonna be, would a 61 be an 800 on this test (like it is in PR book, which usualy is slightly harder than the real test)???</p>

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<p>wah. I though it was much harder than I expected it to be. I used PR and Sparknotes and a bunch of question were on stuff not covered at all in the books. I was like... whaaatttt??? gar.</p>

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<p>wow i think that i got a LOT wrong now....i'm really scared...although some of the ones everyone is iffy on i skipped...</p>

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<p>PR was too indepth, I thought, in terms of prep books ... Barron's too, even though <em>gasp</em> Barron's was easier than PR for once, or so I thought ... </p>

<p>TheDesiBoi, don't they preset the curves?</p>

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<p>well, i think they do, but i hope that they realized it was harder than usual; i think an 800 should be lower than a raw score of 63.</p>

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<p>I don't know ... did you all take the test from the Real SAT II's? Do you think it was "harder than usual"?</p>

<p>Of course I'm hoping for a nice curve, but ... who knows.</p>

30

<p>For the plane mirror one with the people that step forward and back... The answer should be (I think), nothing changes. Plane mirrors' reflections don't change when the viewer moves closer or farther away.</p>

31

<p>damn this test was mad hard and im in ap physics b
i think i skipped like 10-11 questions
how many wrong can i get to still get like 750 do u think?</p>

32

<p>The question about... 2 people on a frictionless ice surface, a 50kg person and an 80kg person. They push off each other and the 80kg goes off at (.25m/s^2 (?)), what's the velocity of the 50kg person.</p>

<p>I got 0.4m/s^2...anyone?
momentum = momentum
mv = mv
80<em>0.25 = 50</em>v
20 = 50*v
v = 20/50 = 0.4m/s^2</p>

<p>The question about which of the following will cause light to split into it's colors? I. Soap Bubble, II. Prisim, III. Diffraction Grating
I put all 3.</p>

<p>Dropping a ball from the 3rd floor, 9m above the ground, how long will it take to reach the ground? I put 1 second.</p>

<p>Astronaut suit... Moon's g is 1/6th earth's g, and it said The mass of Both the astronaut and the suit on moon is <strong>some value, i forget</strong> what is the weight of just the suit of the guy weights 175kg? i think.</p>

<p>I got 375, or something like that.</p>

33

<p>-Experiment showing variety of colors: Soap bubble, prism, diffraction grating. I put soap bubble and prism.</p>

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<p>-Heat pollution: Can you remove it? I put "No, b/c heat can never completely be converted."</p>

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<p>-Heat transfer in a room can be reduced by: I put increasing the thickness.</p>

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<p>Dropping a ball from the 3rd floor, 9m above the ground, how long will it take to reach the ground? I put 1 second.</p>

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34

<p>alright, now my turn to ask questions.</p>

<ol>
<li>hubble telescope
>> something to do with telescope</li>
<li>tree with mirror with a hole
>> smaller, real, inverted?</li>
</ol>

35

<p>experiment showing colors: how do you know its 3 not 2
what was the hubble answer?
intensity: I thought it was 4.. are you def sure its 2?
spring thing: distance from when the spring is compressed to not compressed - is that the distance when the force is greatest? </p>

<p>those are the only 4 i was sort of icky on
i omitted the mirror and the astronaut thing because i ran out of time</p>

36

<p>Friends, where can I find the questions that you are discussing?</p>

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<p>Shabin: You can't, they were on the SAT2 Physics taken on May 7th, 2005. You're not gonna find them posted online anywhere, i doubt.</p>

<p>For the light intensity question, where if you step from 10cm to 5cm to a lightbulb, whats the intensity increased by. I googled around and found:
I = E*r^2, so you're stepping 2x as close, and r is squared, the answer should be 4.</p>

<p>"2. tree with mirror with a hole</p>

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<p>Yep, i think so.</p>

38

<p>sweet, i got that right!!</p>

39

<p>experiment showing colors: how do you know its 3 not 2
what was the hubble answer?
spring thing: distance from when the spring is compressed to not compressed - is that the distance when the force is greatest?</p>

40

<p>~LoJT: "SAT2 Physics taken on May 7th, 2005."</p>

<p>Thanks LoJT. I did my SAT II Physics on Dec 04, 2004 and got a score of 800!</p>