<p>If the elevator is accelerating the net force is up, combined with a horizontal force right, the resultant is up and to the right</p>
<p>The one towards the end, 73 I think, about a plane with a constant velocity. There were no unequal forces right?</p>
<p>It said the elevator was moving at constant velocity relative to the building, not accelerating</p>
<p>for the waterfall temperature question, assumption was PE at top gets converted to internal energy at bottom, right? </p>
<p>said net force was 0 for the plane one</p>
<p>Think i got too many wrong so i’m gonna get somewhere between 700-750, didn’t want to have to retake this so ■■■■■■■■■■
<p>@joppaa I said PE at the top and internal energy at the bottom too, but I don’t know if that’s right.</p>
<p>@ChemCramyea I also said net force is 0, because I was assuming that it was at static equilibrium.</p>
<p>For the slit diffraction thing, it asked how to make something bigger? I know shortening the length of slit would world, but what were the other options</p>
<p>To that one other person, Marie Curie was the person who did stuff with radioactivity. Newton did nothing with that of the sort. Einstein couldn’t have influenced him. Coulomb was stuff with electricity, and Faraday was magnetic field stuff. Galileo would’ve been your best bet. </p>
<p>Also does anyone remember the hotplate thing, and increasing power or something</p>
<p>Ooh, yeah I said something like more steam and higher temperature, but I was really clueless on that.</p>
<p>what was even happening in that, was it boiling water or something? I thought the temp of boiling water couldn’t be increased because that would make it steam and no longer water</p>
<p>boiling water keeps increasing in potential and not kinetic, so temp would stay around 100 C, so the best bet is either more steam, or the other answer, i forgot</p>
<p>anyone know the answer to the quasar theory? answers were: the beginning of time/space, existence in the Milky Way, etc</p>
<p>i think it was something to do with speed, i thought it would be one the speed or more steam or both but it was like an option I II III question</p>
<p>i said the beginning of universe cause if it would take like 5"big number" light years for quasar to reach it, it would have had to been around for a long ass time in order for the light it lets off to eventually reach earth</p>
<p>I also said the beginning of the universe because (well my rational) if we sees things certain light years away, we’re seeing them at that point in time, like how they were in the past.</p>
<p>What about that ‘strangeness’ thing today? Was that about quarks or something? I know for the first question I picked A as an answer choice, which was like : u, s, d (or something like that)</p>
<p>Slit defraction: smaller slits & bigger wavelength. No?</p>
<p>Oh and for the steam that was the only right answer: more steam.
And I got beginning of the universe too.</p>
<p>u,s,d first one can’t remember 2nd one and then it was either the -2charge or +2 charge fo 3rd, don’t remember the numbers but all three of the problems required no outside knowledge, it was just deductive reasoning</p>