<p>@HenryGo I was confused on that question. I used PV=nRT. I knew heat in but for piston I couldn’t figure it out because if you pull out, you are raising the volume (P2V=nRT) so Temperature will raise. But if you push in the pressure gets stronger (2PV=nRT). I was so confused.</p>
<p>what was 1-3? hehe</p>
<p>@FILB they were all A. HA Ha</p>
<p>Dude 1-3 scared me because I found it hard to believe that the 3 in a row were A for those types of questions.</p>
<p>mbomb I am taking physics c right now. my teacher would have killed me if I did not recognize gravity was acting downward the entire time, absent air resistance of course.</p>
<p>@HBOUND good. yeah I was surprised that they started with three questions like those…</p>
<p>I don’t remember what bubbles I filled in but could someone tell me what the answers and the questions were? So, I know if I was right?</p>
<p>Why were the first three questions all A ??
I mean ofcourse Net accelaration will always be downwards</p>
<p>BUT Net force will be upwards jn case of upward motion of ball</p>
<p>Can someone please post tje firdt three questions?</p>
<p>jmlover there is no upward force once it leaves the hand. it was in the air for all 3 questions. therefore, there was always one downward force acting on it, Gravity.</p>
<p>^ I thought there was NET upward force because after all that is why it was moving upwards in the first place. If there was NET downward force, it would’ve moved downwards. That’s what I think.</p>
<p>There was this question about three light bulbs ?</p>
<p>When the switch is closed, The two bulbs in parallel are dimmer compared to the other one right? </p>
<p>And when the switch is open, the one that was in parallel, increases?</p>
<p>what is the raw score that usually is the cut off for an 800?</p>
<p>the bulbs in parallel are brighter. when they close, all three are affected.</p>
<p>For the bar going into the circuit, what was the direction of the current?</p>
<p>But isn’t the resistance less in parallel combinations compared to series? Which means bulbs in parallel will glow less?</p>
<p>EDIT : Chuck. I got my mistake -.- :P</p>
<p>When the switch is close, all the bulbs should be the same, but one of them is not on,</p>
<p>cant be determined. lenz law. you need to know direction. answer: e.</p>
<p>But don’t you also need a magnetic flux?</p>
<p>As far as I know the first question asked which was the brightest, it was the one that wasn’t in parallel . and then the question asked if we open the switch which bulbs would have a change in brightness. One would normally think that the brightness of the one in series would stay the same but the bulb that was cut off had a resistance so all 3 would have a change in brightness.</p>
<p>parallel bulbs usually are brighter because their resistance is lower. more current.</p>
<p>@HBOUND Here goes my first question</p>