<p>Yeah I’m at -12 right now. And I’m on the edge on math II as well.</p>
<p>I missed:
Efficiency 60%
Omit average speed
Electrons ionize air
5 x 10^7
Momentum
Kinetic energy
Interference
Decrease in bands
Normal force
Standing wave</p>
<p>efficiency is 40%… im 100% sure of that question… and was the answers to the electron one that they ionize air?..
What Kinetic energy?</p>
<p>Well i think an obj cannot approach speed of light because it would dissappear as
Gamma=1/(1-(v/c)^2)^1/2 and L2=L1/gamma
If v=c the gamma=infinity therefore L2=L1/infinity=0
Therefore length will become zero …it means that it will dissappear wont it?
Correct me if i am wrong.</p>
<p>I am really not sure about E=mc^2 as how does it explains that energy becomes infinite
I thaught about it during the test but there wasnt an equation tht supports it whereas i was able to recollect the length contradiction
I might be wong but can anyone explain to me how E=mc^2 justifies that when a body reaches the speed of light its energy becomes infinite?</p>
<p>Hmm well that is one confusing question though
I hope i reach 770+ as i omitted 5 questions and m getting 6-7 wrong :/</p>
<p>I donno maybe you might wanna consider cancelling?.. i got around 7 wrong 2 omit… borderline 800</p>
<p>@miroklose the question was what ALWAYS changes when a const net unbalanced force is applied on a body
And the answer is momentum</p>
<p>well direction doesn’t always change because if the unbalanced force is in the same direction then direction won’t change</p>
<p>momentum is the measure of inertia and as the unbalanced force acts on a body the magnitude of inertia changes</p>
<p>not exactly…well it can be if incase the body in in a uniform circular motion
but the same applies in the case of translational motion.</p>
<p>Just in case anyone was wondering… Depending on how lenient the grading curve is, 13 wrong can still get you an 800. That is, a minimum raw score of 59.</p>
<p>Yaa it varies from 59-63</p>
<ol>
<li>The question was a sound wave and a light wave have the same wavelenght.
The answer was the light waves frequency is greater than the sound waves frequency as a light wave travels faster than a sound wave and since wave lengths were same it had to imply that the frequency of light wave was greater than the frequenct of sound wave.</li>
</ol>
<p>Yeah i am pretty sure about that question
Other all i dont remember that well so i dont want to comment on them
I recommend that if you feel you didnt do as well as you expected to then retake the test this december r January</p>
<p>Yes it was
It was my first time too</p>
<p>What about the question about some students do some experiment ???
From 1s to 2s …
From 2s to 3s …
From 3s to 4s …
I don’t really remember the question.</p>
<p>How many questions can you get wrong and still get 750+ ?</p>
<p>That was a really confusing Qs</p>
<p>The answer to that was that the average velocity at T=3 was 10.77 or whatever… I got that momentum question wrong… Hoping for a generous curve</p>
<p>Guys, I honestly don’t mean to sound pretentious, but I got everything correct. And I’m pretty sure of each answer, so go ahead and PM me (or post over here) if you’d like to still discuss a particular question. It’s just the kind of Physics we do over here in India … we’re practically halfway through second year University courses, and it isn’t even considered difficult.</p>
<p>LOL i too study in an indian school
nothing is considered difficult in the indian education system</p>