<p>But does anyone know if i could have said charge and mass for the last one??</p>
<p>yea i put charge and mass for the last one as well…</p>
<p>Last question number 85. What about momentum and mass entry equivalent?</p>
<p>im pretty sure, momentum, charge, mass, energy all could have worked</p>
<p>What did everyone get for the momentum one on the short answer. First i got 116.38 but then i changed it at the last minute to 7.38 when i noticed they were going in the opposite direction. But when I asked my friend after the test, he said that it asked for the MAGNITUDE OF THE MOMENTUM and said that the right answer is 116.38.</p>
<p>I didn’t have enough time to copy all my answers on my calculator,except for the first 24 but from looking at everyone else’s answer it looks like I got about 7 wrong out of the 24 I copied. </p>
<p>Also… Does anyone remember that question about the Cart and what happens when it slows down?
About what happens to the kinetic energy and the gravitational energy? </p>
<p>I think I picked that kinetic energy decreases and gravitation energy remains the same</p>
<p>yea that was the answer</p>
<p>What about the one with the 2 poles that touch each other? I think it was underneath that problem
I had put the one with the positive and negative signs</p>
<p>i think it was the one with 3 positive signs to the left and 3 minus signs to the right</p>
<p>I think I picked (2) but I know it had post irvine and negative signs </p>
<p>Just wanted to chime in! I’ve been reading through this conversation and I just wanted to say that taking this test as a 9th grader, I still haven’t quite recovered from how hard I though it was!</p>
<p>So then why did you take it as a ninth grader?</p>
<p>What did everyone get for the momentum one on the short answer. First i got 116.38 but then i changed it at the last minute to 7.38 when i noticed they were going in the opposite direction. But when I asked my friend after the test, he said that it asked for the MAGNITUDE OF THE MOMENTUM and said that the right answer is 116.38.</p>
<p>@reedm121 I am an honors student… My school is the only school in New York that offers physics to 9th graders</p>
<p>And I got 116.38 for that question!</p>
<p>I have a question… I don’t remember the question numbers but here was one:
There was like two spheres and one was -4 something and one was -8 something and the choices were like 5x10^13 and 7.5x10^13 and like 2.3x10^13 and I think 3.8x10^13… Anyone remember their answer?
Also, the question had to do with visible light and the choices were n=2 to n=5, n=5 to n=2, n=5 to n=6, and n=6 to n=5… Anybody know?</p>
<p>No it’s 7.38. Asking for the magnitude of the momentum is irrelevant. Velocity is a vector, so you need to include the negative for the second velocity, since the two cars are traveling in the opposite direction. Also just think about it… for two carts traveling in opposite directions and colliding, they’re going to slow down… if the momentum was 116.38, that would mean they sped up, and a lot. That isn’t possible.</p>
<p>@HayleyHopeee you had to find the average of the two which was -6 x 10^(some number) coulombs, and multiply that by 6.25 x 10^18 which is the conversion factor for coulombs to electrons. The other one is n=5 to n=2.</p>
<p>@DAIMYO well I got both of those wrong…</p>
<p>Why cant we view them anyway? are people still taking them?</p>