<p>How far did the little girl run b4 catching the ball? 3 meters right?</p>
<p>What was the answer to the question with that pulley lifting up a 200N object. It asked for work done when moved 3m.</p>
<p>for the Magnetic Field pointing at E southward and charge -q</p>
<p>did you say that the Force was qE northward</p>
<p>and also, the 3 charges, was everything zero when you move III two cm to the left</p>
<p>The pulley question was just F<em>x i thought = 200</em>3 = 600</p>
<p>Do you remember the speed of the girl?</p>
<p>Im thinking i messed up, and it is 3.</p>
<p>If i remember correctly, she ran @ 3 and threw it at 5m/s (so it’d be airborn for 1 second)</p>
<p>which means 3m/s</p>
<p>■■■ i accidently used 5m/s for her speed</p>
<p>Yeah qE north.</p>
<p>Anyone for the acceleration at P?</p>
<p>And the work pulley one, i think you only use vertical component of tension for force… Forgot he exact answer</p>
<p>I think it was when you moved III 2 cms. to the right.</p>
<p>the block with the 0.5 Kg Mass on the incline and the 2 kg mass hanging has the greatest acceleration</p>
<p>and the one with the 2 Kg incline and 1 Kg hanging was the one that didn’t move</p>
<p>Would it make a difference whether or not you move the 3rd 2 cm to the left or the right if all three were just equidistant from one another</p>
<p>what was the exact answer for the doppler effect question?</p>
<p>Ahh i left blank the one that didnt move。… I was gonna guess that though haha</p>
<p>Wasnt doppler frequency?</p>
<p>And moving III to the right is the same as equidistant, but i dont equidistance was a choice… Was it?</p>
<p>i thought the “natural” frequency stays the same</p>
<p>the answer like like D which said something about the wavelength as the train got closer right?</p>
<p>^Thats what I put…</p>
<p>that the wavelengths got compressed</p>
<p>loudness is determined by amplitude?</p>
<p>@spectravoid yes</p>
<p>Oh youre right… I didnt know there was a difference between natural freq and normal freq</p>
<p>loudness is determined by amplitude?
yea^^</p>
<p>were the 1st 2 frequency?</p>
<p>When guitar string tension change, isthat resonance?</p>
<p>i said frequency for that one guitar</p>
<p>when tension of string changes, frequency changes.</p>
<p>So… U said a change inguitar tension is just tension?</p>
<p>Oh duhh freq… So stupid</p>