@chemstar the question about the XYZ Triangle in electricity
Wouldn’t Newton’s third law make 820 the force for both?
@chemstar i misread what you wrote I had 820-820 for the momentum question
@OhPearl you’re correct I misread what he wrote
@Deftera Does it really matter since current is always the same in a series circuit?
@chemstar yes because you’re trying to prove a point with your experiment
@mayman - Yeah the XYZ question was pretty confusing, but apparently it was considered a resister, since the original voltage was 3.0, and XYZ was a resister the answer was 1.5.
^Ammeters always have to be placed in series, and you’re trying to prove that current is the same, so you can’t make that assumption
Anyone have form C??
the FRQs were HARD.
I had Form D. From what I’ve read, most people on here had another form. Our MC was decent. I got through all of them without a hiccup. It was the FR that was difficult for me. There was a question regarding a projectile and putty, one on disks and rotational inertia, and so on an so forth. I felt like I answered 2 completely right, 2 (the 25min ones) partially/completely right and the paragraph partially wrong. After conferring with others, it seemed like there were two tests: one with hard MC and easy FR and one with easy MC and hard FR.
At worst, I got a 80% on MC and 50% on FR, which would be 65% which may or may not be a 5. At best, I estimate approx. ~80%. Any other Form D’s out there?
@chemstar Wouldn’t you consider the longer portion as a resistor with twice the resistance? So 2/3 of the current would flow through the shorter one and 1/3 through the longer one?
i second @EpicPear
@EpicPear - Distance doesn’t matter at least that’s what my teacher said. In parallel voltage are always the same, and if the resisters are equal than the currents are equal regardless of displacement.
V=IR formula**
@chemstar But I believe it said the wires themselves have resistance and resistance is R=pL/A where p is the resistivity, L is the length of the wire, and A is the cross-sectional area.
Guys what about the question with the rotating disk and the guy throwing the ball to that other girl. Does the angular momentum change?
YES @PSAT2014TAKER finally someone else… i had no idea what to write for the last free response and i think i screwed something up on the free response with the graphs but other than that I feel really good about the circuit one, the very first one, and pretty ok about experimental design except for the last part about uncertainty.
Hoping for a good curve. I thought MC was pretty difficult and FRQ was kind of confusing. Should have reviewed the labs and each component of them.
@chemstar did the wire and XZ have the same resistance though? that was one of the questions
@mayman they had the same resistivity
I had Form O and I thought that the mc was hard and the FRQs really easy 
hopefully got enough correct for a five…i barely finished on time though