OCTOBER SAT Subject Test: Physics

<p>hahah.. me too(distance she slides)..
but i doubt thats correct!</p>

<p>I went with the engine. It was the only option that didn't effect her resistance or static buildup.</p>

<p>Can someone explain why it's not distance slid?</p>

<p>Well The More the distance she would slide the more static build-up and hence she'll get an even powerful shock!</p>

<p>F=ILB maybe?</p>

<p>It's definitely the engine. Distance she slides directly relates to number of electrons and static shock</p>

<p>


</p>

<p>By Ohm's law, V = IR. The voltage must be conserved because it's simply the electrical equivalent of potential energy. Therefore, current and resistance are inversely proportional and less resistance = greater current.</p>

<p>And yeah, it is definitely the engine for the one above.</p>

<p>what did you get for the elevator question. you know, the one in with you accelerating upwards. your acceleration in relation to earth, in relation to the elevator, and the elevator in relation to you.</p>

<p>so u r telling me current stays the same??</p>

<p>Im hoping its differnt bcause i picked that one...</p>

<p>Furthermore R=(p)(L/A), they are all the same length, but the thicker one has a greater cross sectional area, A, thus has a lower resistance than the 2 thinner ones. Current has nothing to do with it.</p>

<p>I thought this was the one with several paths (with different resistances) to choose from? If not, then nevermind.</p>

<p>No, that was another question. This one refers to the one where there was a picture with a single loop given, with 3 pieces of current in the loop, two of them thin looking, one thick. The question labeled each part of the wire and first asked which one of the wires has the highest current, followed by a question about which one of the wires has the highest resistance.</p>

<p>Soulside Journey: The current remains consistent throughout all resistors in a series circuit. The resistance for each one is obviously differenct, but I1=I2=I3.</p>

<p>yeah, what was the answer to the elevator question, accelerating upwards, asking something about the force?</p>

<p>what about the question about which induces an emf: i picked turning off the current and moving magnet</p>

<p>Doesn't a coil only produce a significant magnetic field in the center of it? I could be way off base here.</p>

<p>Now that I think about it, Baelor is right. The question did not give a diagram, and the answer only said the magnet was "close" or "near" the other magnet, however it did not define how the position was laid out. Only in a certain position when the two magnets with coils were both in line with each other (kind of hard to explain), basically in a specific layout, would turning on and off the current induce anything on the other coil. Thus I believe the correct answer was only III, which was putting a magnet through a coil or something like that.</p>

<p>before i decided if i should cancel my score or not, what do u guys think my score is if i skipped 8 and roughly missed another 10-12?</p>

<p>what do u guys think my score will be? I need to know before the cancel deadline...</p>

<p>^^ On the collegeboard practice test I took, it was possible to receive an 800 while receiving a raw score of 59. If you missed 12 and skipped 8, that would be a raw score of 52...low to mid 700s. Very respectable.</p>

<p>i am scared for the results</p>