<p>I got momentum, and force was 0 for the reason someone else said earlier. Slit question is decrease, increase, I just checked online. Telephone waves is due to microwave towers or something like that. I put momentum for that one question also. Efficiency was 40% for me. I got refraction for two questions and scattering for sun. I got different coefficients for the two metals bending one. For the question with tables in the left column I put that the average v at t = 3s was some quantity. Special relativity speed question was greater than .6 c but less than c.</p>
<p>there was one about inducing EMF…I wasn’t sure if all three were correct answers or only the third one. anyone know?</p>
<p>also the one about the average force of friction with 36 J of energy over 2m?</p>
<p>I put total internal reflection on the telephones questiion. It was supposed to be something about visible light, so microwave is not an option I think</p>
<p>I put fiber optic cable for telephone question.</p>
<p>For the .6c question, I put .6c</p>
<p>wasn’t that one just 36/2 or on avg 18j of force per meter?</p>
<p>For the induced current one I said that the 1st way with the current running wouldn’t induce a second current, becuse the current has to be changing to induce a second current.
I’m think I remember the other 2 ways working.</p>
<p>Yes, the last two options were correct.</p>
<p>The question with the magnetic field was confusing. It said it was an ELECTRON. Hence, wouldn’t you use your left hand (or right hand but switch the direction of the force) and the field would be INTO the page? I put out of the page because there was no into the page option, but I don’t know.
And for the sun light I thought it was polarization… Wow, I messed up more than I thought.
EDIT: And I got that flux question wrong… I rushed toward the end.
By the way - when are we getting our scores back?</p>
<p>3 weeks, you could google it and find an answer easily</p>
<p>was the special relativity one just 0.6c?</p>
<p>No it was 1.2c cause they were traveling in opposite directions.</p>
<p>I think it was greater than 0.6c but less than 1c because you can’t travel faster than c.</p>
<p>Related to that, there was a question that essentially asked why you can’t travel faster than the speed of light. What was the answer?</p>
<p>I think it was that your energy would approach infinity. I’m pretty sure this is because of the special relativity equation for mass m= m(observed)/sqrt(1-v^2/c^2). So when v approaches c, m observed approaches infinity, and because of E=mc^2, energy would approach infinity.</p>
<p>What did you guys put for the metal strip placed across the circuit? Did it represent a resistor?</p>
<p>Hey, did anyone else use a Barron’s book to prep for the test? It’s supposed to be a lot more difficult than the real thing… I consistently got what I think translates to 760-770 in that book (13 or so incorrect, none omitted on any of them) and I omitted 15 on the real thing and know I got more wrong.</p>
<p>I just… I don’t get it. And it can’t be because I studied Barron’s materials because I’d barely studied before taking my first test (which I probably got a 740 pessimistically).</p>
<p>And Goldenchest: yes, I said it was a resistor.</p>
<p>And I want to say I think the phone one was the fiber optic cable… but do you guys remember exactly what it was asking?</p>
<p>I put fiber optic as well</p>
<p>Pieofapples I’m in the same exact boat regarding practice test performance to yesterday’s… I omitted a good amount and was not very confident in the answers that I did put down. Even in the official SAT subject practice book, I answered all but a few and scored high 700s. And I believe it was fiber optics.</p>
<p>PieOfApples, I’m having the exact situation as yours. I have been told that a 750~780 on the Barron’s would give you an 800 on the real thing. When I took the blue book’s test, I scored 69. I thought I was gonna crush this test, but instead it crushed me:/ I left 4 blank and guessed at about 8~10 questions. From what I just read on this post, I totally messed up.</p>
<p>PrincetonReview is known to be a better book for SAT Physics than Barron’s^</p>
<p>So with the electron problem, where did you his say it would land? I said it would land at point R, exactly opposite of where the proton landed, but now I’m starting to think it would be between Q and R.</p>