Sunday, November 29, 2009

Arhh crap....been playing a lot these days, DOTA, Empire Earth AOC and what not....

Been neglecting a lot on revision and H3 sia.....Thats why i did a H3 paper 2007 A lvls ytd to assess by standard man....gt 73 nia....bt thats gd considering the time spent studying for it lol....Guess i gt little prob doing most of the calculation questions and the graphs questions....Most of the prob i encounter is those definition questions...

Generally, I tink my strong topics are Special Relativity, Quantum Mechanics, Quantum Theory of Light, Solid State Physics where most of the calculations and proofing involves....SR was previously a dreaded topic of mine but after studying hard for the construction of Minkowski Diagram i realise i can solve most of the question requiring Lorentz transformation without much doubt....Just nid to find the function and inverse function then determine the line of simultaneity of the event then can le.....

QM i guess i am pretty gd at it le...could do HCI, AJC, CJC 2009 prelim QM question w/o diff...
I guess the main bulk of QM lies with Schrodinger Equation....For H3 level, since we are dealing with 1-D situation there are nly a few types of questions that they can set man...The first type is the verification of solutions of Schrodinger Equations. The 2nd is to determine normalization constants. The 3rd is to proof Simple Harmonic Oscillator in a infinite potential well and finally energy of Harmonic oscillator. The type is the manipulation of momentum operator to derive K.E operator then determine time-dependent Eqn then finally time - independent equation...All of these questions can be solved easily once you have a gd graspe of how to apply boundary conditions and the rest is just some mathematical manipulation that usually involves integration by parts or some differentiation.....Even the qualitative question is always the same old bs....Why do you nid to normalize....blah blah...

Quantum theory of light is mainly qualitative, laser operations for helium-neon...A bit of statistical calculation of population inversion....Wien Displacement law...Then explain Planck's hypothesis and the collaspe of the princple of equipartion of energy for f->uv frequency leading to UV catastrophe....Neil Bohr's model of hydrogen atom...How Principle of Complementary can explain the various postulates of Neil Bohr's model....How 4th postulate lead to the quantization of angular momentum....How Heisenburg Uncertainy principle explain apparent stability of atoms...Classical atom model by Rutherford and how Larmor's theorm predicts the collaspe of a classical atoms....

SSP is generally ok except for the semi-conductor chapters where bulk of the mathematics set in...I still have some problem derving relativistic equations of Fermi Energy and stuffs....The Pauli Exclusion Princple and stuff is quite self-explanatory when u read the notes.....I just hope they dont ask u to proof some drude shit again as 2007 h3 paper, coz i reall spent 20 mins on just proofing the Average Drift Velocity equation when i am doing the Paper....Reall nid to proof from scartch de....

I damned scare Matter Wave and Photonics....Matter wave the most dreaded part is when they combo with SSP crystal structure, where u nid to determine the d from the crystal structure and determine other quantities....Quite hard core in my opinion...

Photonics i damned scare those modes questions on standing waves...When u nid to explain and calculate cut off wavelength and stuff in a single mode optical fibre and stuff....The rest is damned lame coz u just nid 1 formula to proof everything which is Snell's law and the rest u just nid to be gd at geometry to see angle then u can proof very much everything elegantly....

Hope i can see this score appearing next Year man

Chemistry H2 A
Economics H2 A
Mathematics H2 A
Physics H2 A
Essential of Modern Physics H3 DIST
General Paper H1 A(yea right)

Thursday, November 26, 2009

Crap, shld have attend more h3 lessons...SSP topics so unfamiliar until i nid to go figure everything out myself...plus i lost most of the tutorials that the h3 tutors gave me....crap...
Spent like 1hr trying to figure out how to even start calculating APF of different structures....realise HCP structure is the worst man.....I spent like 15 mins trying to figure out how to even approach the calculations.....

Must write down b4 i frgt...

Let X be the side length and Y be the height of the hexagon.....

From the structure, it is damned freaing obvious that X= 2r where r is the radius of the atom...

Then here comes the headache part.....To determine Y, we nid to isolate the pyramid of the hcp out....

You will notice that each of the side of the base of the pyramid is 2r, then by projecting a segment from each corner of the pyramid, you will trisect the base with 3 triangle of side 2r and 2 sides of a length.

Then, you should determine the area of the base of the pyramid, which is sqrt(3)r^2

Then determine each of the 3 triangle area by dividing by 3, which is sqrt(3)r^3 / 3 .

Then determine a, which is 2/sqrt(3) r,

Then you realise u can resolve the half the height of the hexagon by considering the total height of the pyramid... Which is by Pythagoras, we will result in a hexagonal height of 4 sqrt(2/3)r...

Then u determine the area and tot vol of HCP, then determine the rest of the bullshit, u shld get a APF of 0.72 which is correct according to some physics websites on APFs.....

haha fuck this, still have like 3 more subunits of SSP to go....

Tuesday, October 27, 2009

After so much freaking mugging and gaming throughout the study break...I realise that Mechanics Engineering dont seemed to be a bad idea...I guess getting a gd job really depends on connection and my cousin promise me that i made did well in the course he will recommand me in for a gd paying job...I really tink this world is abt certs and connection man....My cousin gt his first job without to search for it coz my uncle help him pull string with the top ppl in the company...His first job was like 5k almost 6 le....which is dmaned crazy for a fresh graduate....Then within yrs, he gt promoted and gt transfered to UAE as a country manager...Recently he gt transfered back to Singapore, while and continue working as some sales thing( i nt sure wats it) but the pay is at least 5 digit....omg man....this is crazy...nt married somemore...no gf somemore...wth...no commitment...fuck....nid to be like him man....my first job must be imba.....

Tuesday, October 20, 2009

Been awake for almost 24 hrs....Paraxanthine and Theophylline are doing gd in my CNS....Mind over body...push on out....time to execute the physics module today....
Played EE with yr until like 1 plus....then i went to get some supper....before attempting to study...bt when to watched some documentary abt the columbine high school masscre lol....then i realise gg....this is called A lvl preparation....Then i decided to start to print out the physics materials on km....going to go out to study with yl and yr at arnd 4 hrs times....meanwhile...chill my brain while i look through a few more vids...

Sunday, October 11, 2009

Looking through my prelim Econs scripts I found something damned inspiring....I realise that the Essay is 19/25 is the script i have wrote an essay out of it and gave Steven Gerrald to comment...I still rmb i wrote an essay whether Aggregate Demand Policy can help Singapore get out of recession of something like that...Then I did an essay whether Singapore 'small and open' economy help to affect it policy choices in the cushioning external shock or soemthing like that....I guess that reall help me a lot leh...coz in the exam straightaway i could tink of the 5 Primary tools....A purely AD policy, AD with AS and AD intentions, Monetary Policies, AS policies and Trade Policies....I guess my main prob is i spent too much time planing the essay during the exam liao, and i gt hooked into writing that essay....Nw is the time to read as much essay and try some essay my own until i can perfect the skill man......Time to push on.....

Saturday, October 10, 2009

Got back my H3 physics results...Guess it wasn't that bad...At least I passed, bt i know if i had went for lessons i might be able to get higher one....Bt nvm, just that I am glad that those topics i studied and comprehended before the paper I did pretty fine...Since I alrdy blank out 37 marks, meaning that the remaining 63 marks must have majority correct....I tink my Special Relativity, Quantum Mechanics and Semiconductor shld be fine....

Been doing those questions uploaded on the KM for physics....Analysing the differents of approaching those qualitative questions....I guess my calculator skill really suck, if i am nt paying attention to wat i am pressing...I can press and miss out a few no here and there one....wth....nvm...is ok .... After thorough analysis and cross-referencing, I realise that really, content subject can just study on your own if you can do a gd and thorough job one....Using the same stratgey which i did for Stats, which works quite well....I guess i really dunid a tutor to teach me the stuff bah lol....just nid all the stuff to be uploaded, and given the time i can try to figure out myself....Especially with Correlation and Regressions, nv go a single tutorials, with the help from yl and looking through the ans for all the prelim questions, i can und the topics and do it in exams....

All right, time to start studyingagain lol