<p>I just finished wasnt too bad !Lets post answers once we are allowed.</p>
<p>bump........</p>
<p>Did u guys noticed there were no modern physics questions??
They gave way too less optics and too much electric and magnetic stuff !</p>
<p>There were definitely modern physics questions... Specifically mass-energy equivalence (toward the end). I think #74 or #75 was also something modern, but I didn't attempt the last two (ran out of time!). There were also a couple atomic model questions, if my memory serves me (I know there was at least one).</p>
<p>There was also the superconductor question. I'm feeling like there was even more, just can't recall.</p>
<p>yeah you are right but there were no decay equations. #75 I had no idea how to solve.Anyone has done it?</p>
<p>elisa hey number 75 was C for sure I dont remember the exact question but when it is hc/lambda i believe?</p>
<p>what did you put for the one with the magnetic field question with the spirals lines and when it moves out of the spiral thing, which way the line moves? I put to the right. I reminds me of centripetal force and velocity in circular motion. when it is no longer keeeps the object moving in a circle like motion the velocity will spring in the direction perpendicular to the force? Anyone else have other answers?</p>
<p>i hope this one was easy in the beginning they ask for a graph with high amplitude (?) is the answer just the one with the greatest height?
Also what did you put for the d vs time graph where an object would falll freely towards the earth?</p>
<p>other questions
1) 2nd law of thermodynmaics: it is possible for heat to flow naturally from high temp object to low temp. object right?
2) the lighting problem with the girl, the distance is 33m?
3) the car was sliding down a hill. the velocity stays constant. The tempting choices were between the momentum which doesnt change or the KE which does not change?
4) what works led to some atomic model?
was it alpha particle experiment?</p>
<p>when it remebers other, i will continue posting! Thanks for your thoughts!</p>
<p>1)I thought that was the zeroth law of thermodynamics, the 2nd law is entropy always increases, im not sure what i put
2)somehow I put 3,300
3)momentum does not change, KE increases as something drops
4)I think it was the one about Bohr, it didnt mention his name</p>
<p>Yeah, I believe the one with the highest height was right</p>
<p>The thing that was falling towards earth: The acceleration is constant, so I think I just put the graph that was increasing at a constant rate</p>
<p>Im not sure what question youre talking about with the spiral</p>
<p>4) I also put the one with the alpha particle experiment.Rutherford discovered the nuclear model of the atom..Bohr just added some stuff about radius and energies.</p>
<p>The amplitude one was easy but in the same set of questions there was a question asking which has the biggest period. Did u put e) ? I mean the one which had just 1 half of circle?</p>
<p>The spiral one , you mean the one with the ball inside? For that one I just put straight out from the spiral, that made sense to me!</p>
<p>Oh, the ball one; I, too, put that for an answer</p>
<p>
[quote]
what did you put for the one with the magnetic field question with the spirals lines and when it moves out of the spiral thing, which way the line moves? I put to the right. I reminds me of centripetal force and velocity in circular motion. when it is no longer keeeps the object moving in a circle like motion the velocity will spring in the direction perpendicular to the force? Anyone else have other answers?
[/quote]
</p>
<p>No, I think the ball would continue moving straight. If you are swinging something in a circle and let go, the object will fly off at a tangent, not perpendicular!</p>
<p>The surface was also frictionless, so the exact direction it was last moving is the direction in which it will continue. All centripetal forces are immediately gone because there is nothing to keep them going. (for example tension in a string provides the centripital force, or if you are a car going in a circle the frictional force on the tires provides the centripital force)</p>
<p>I think that's what elisa meant</p>
<p>anyone that remebered the choices that they put for the mass-conversion problem?</p>
<p>Well I don't remember Sking.
Goodluck to everybody with the scores :D</p>