<p>Two other questions not on the list asked for the acceleration of an object during the 2nd minute and the other asked for the graph of an object over 2 minutes. I forgot my answer to the graph but i got .17 m/s^2 for the acceleration of the object during the 2nd minute</p>
<p>During the second minute, the acceleration is .33 m/s^2</p>
<p>Also for the 1.7blah measurement one, I’m pretty sure the answer was II only.</p>
<p>I. had accuracy of ±2mm, so that was less accurate. III. was only 30 cm long, so you would need it multiple times to measure the distance</p>
<p>^yup I got both of these. Never thought I’d see 2 sig figs questions on the test.</p>
<p>And thanks for the explanation of the bulbs! :)</p>
<p>yah at first i thought it would be II only, but the number was 1.7358 or something, so I would be as accurate as II, but only for this case!
so it was a trick question. its I and II.</p>
<p>Hmm I’m not sure what you mean, 1.7358 m is 1735.8 mm. Wouldn’t it be more accurate to measure with an error of ±1 mm? Or I might be wrong, because I didn’t really read the question very carefully.</p>
<p>+/-0.1mm would give us the range 1.7357-1.7459m, whereas +/-0.2mm would give us the range 1.7356-1.7560m</p>
<p>So +/-0.1mm is more accurate is it not?</p>
<p>I’m on my iPod, so I can’t edit. But it’s supposed to be 1.7357-1.7359m in the first scenario.</p>
<p>And these second one is missing a 3…<em>sigh</em> </p>
<p>Lol I’m sucha fail :)</p>
<p>…I’m just going to stop now. </p>
<p>You all get my point…so don’t eat me.</p>
<p>“45. voltmeter connected in parallel, ammeter connected in series”</p>
<p>anyone remember if this was the first picture?</p>
<p>and what about the ruler question? i think an answer choice was 25 mm, plus or minus 0.01 or 0.2?</p>
<p>for the voltmeter and ammeter, i dont remember it being the first picture…but voltmeter was connected in parallel, and ammeter in series. it might have been the first picture.</p>
<p>Anyone remember the question with the piston, and adding gas/heat?</p>
<p>what was that question? i dont remember it.</p>
<p>yeah, it said how to raise the temp of the gas? i think i said lower the piston and add heat</p>
<p>@squiggly it was the second picture, i remember vividly.</p>
<p>I said raise the piston and add heat, because raising it compressed the gas so it has more pressure.</p>
<p>[One</a> atom gas](<a href=“http://galileoandeinstein.physics.virginia.edu/more_stuff/Applets/Piston/jarapplet.html]One”>http://galileoandeinstein.physics.virginia.edu/more_stuff/Applets/Piston/jarapplet.html)</p>
<p>if you click “compress” watch how the pressure increases and the temperature also increases…so i think lowering the piston compresses the gas, thus raising temperature</p>
<p><a href=“http://performancetrends.com/Definitions/Cylinder-Pressure.htm[/url]”>http://performancetrends.com/Definitions/Cylinder-Pressure.htm</a></p>
<p>Heat is added after the compression stroke which is in the upward direction. Come to think of it we learned this in auto last year.</p>
<p>@lordfarquan</p>
<p>The open circuit and closed circuit have different overall resistances, so the overall current that passes through Z will be different when the circuit is open compared to when it is closed. Your diagrams are correct, but you failed to take into the account of resistance changing in each scenario.</p>