<p>Use the right hand rule. Since both the currents are pointing up, and the mag field is pointing down, the force has to be to the left.</p>
<p>they were not both pointing up. Otherwise I would’ve said left also. I’m pretty sure they were pointing in opposite directions… Can anyone else confirm?</p>
<p>And what was the answer to the question about pitch and amplitude? Does amplitude cause loudness to increase? And i remember there was like one more pitch question.</p>
<p>I just remembered a video I watched two days before, if current is going in opposite directions, there is an attractive force. Also the question was increase tension = increase pitch</p>
<p>was there an option for increase wavelength. Because increased tension increases the velocity of a standing wave. and by v=f(lambda), it could increase either if the other stays constant</p>
<p>Only change in medium affects wavelength, so pitch is the better answer</p>
<p>I thought I did pretty well but I screwed up a lot of easy questions</p>
<p>What did you all get for the two questions about spectra and neon gas/filaments?</p>
<p>Uhh i skipped that one, sorry. Does anyone remember a problem about a battery?</p>
<p>Minutemaid, current going in opp. directions will repel each other.</p>
<p>Also, why is it 3g? The question doesn’t specify acceleration in which direction. As the rocket moves up, the astronaut is pushed down, causing the seat to exert a force of 4Mg. Isn’t g also an acceleration, so that the acceleration is 4g?</p>
<p>Draw a FBD? 4Mg points upward, Mg points downward. Fnet=4Mg-Mg=Ma.</p>
<p>Ok great got the wire question wrong too</p>
<p>I think what messed you guys up was that you forgot normal force was included in the seat’s 4Mg pushing up?</p>
<p>^ I know that Mg is included. I wanted to answer 3g at first, but then I thought that the question didn’t specify acceleration in which direction, so I answered 4g. -.- DARN.</p>
<p>Oh, so you thought the rocket might have been going downwards? Isn’t that 5Mg=Ma. Anyway, you’re much better off than me. I have already gotten 3 extremely stupid mistakes which could have all been correct if I spent 10 minutes studying (UC apps…) Is -3 like -30?</p>
<p>What did people get for the question about the guy kicking the piece of metal? I got 5 m, not sure if I did it right.</p>
<p>Also, what did people get for the question about the two coils of wire and the traveling current (increasing in two directions and constant in two directions)? From what I recall it asked if a current would be induced in any of these four situations.</p>
<p>Yea I think I got that. No idea, for wires, I skipped most of them</p>
<p>Is it hard to get more than 600 
i omitted 26 arghh and some confirmed wrong TT</p>
<p>So stress as its my last time.</p>
<p>^same concern as chainzz. Should I just cancel my score…</p>