..:: tantaibits ::.. Glory Glory Man UTd!

tAn+@iBi made the teamtalk at 11/22/2005 12:44:00 AM

END OF A LVLS

hahah.. its an irony how i had so much time to blog during exams and no time to blog after it.
but it's possible.. coz.. there's a limit to how much u can study. but not to how much u can enjoy. haha.. so first.. about the last paper, chem mcq.. it was ok. not easy not hard. juz ok. already found out i got 1 wrong. no one was in the mood to discuss any other questions haha. so we were all thinking about enjoying.

so wad did i do after the paper?

haha my class bought a cake for katie. sang the usual bday songs. and the usual stuff. met ms chan, who probably heard us frm upstairs. haha. then went with van,doro and jo to block 1 to shout. to NYP. help it's the end of a lvls. ok we din do tt. but still shouted. haha. ok. then went to clear our lockers.. then set off to marina..

supposed to go marina south for steamboat. ended up in a cruise at marina square. y cruise? oh it's air-conditioned and sheltered frm the rain. unlike the steamboat at marina south. so we had Carl's Jr. huge burgers. refillable drinks which no one at tt pt in time of saturatedness possible to take in anymore. went shopping. walked ard marina square. no one bought anything. oxygen is freee i guesss. haha juz explored the new marina square. then crossed the road to esplanade. went to rooftop. took pics in the dark, sat in a circle. discussed plans. and played games.haha. chinese ones. then went to the foyer. took pics as a whole class. and a giant slipper.. then we split. went to meet the church youth at kim san leng. drank something and went home liaoz. reached home chiong yahoo pool and Championship manager till 5.30am.. o.0 hah then slept till 12pm. not much

19th Nov

went to watch Charmaine perform at YMS. haah it was a piano and violin concert. well i think it's my first time watching a violin performance and a solo piano concert.. or maybe first time in a very long time. anw while watching these performances by several individuals. it made me think.. music frees ur mind. ur right brain. tt's right. u dun hav to be too focused. juz relax. anw i thought of how the concert can juz be like the A lvls.
the stage is the playing field.
the performers are the candidates
the pieces are the subjects you offer
the teachers are still the teachers.
well those are juz symbols. but it's like practises put in juz like amt of hrs put in for studying juz for this final event. ppl will judge u based on this. if u dun play well or for the matter, dun do well. they juz think tt u hav not put in as much effort as the rest. but u noe tt it's not true. so i feel that SPA is better than juz one practical exam. hah. allows for consitency. yea. jumped to conclusions to fast. but tt's the way i am. cya soon.

tAn+@iBi made the teamtalk at 11/20/2005 01:55:00 AM

Physics Paper 3

haha finally it's down to one paper left. i juz woke up after a 3 hr sleep.. hha today the physics paper was ok.. not tt hard but not tt easy either.. the hardest was question 4.. i thought of attempting question 6 at the end to replace qn 4.. but again.. im glad i din. coz im bad at flux cutting. im not a good conductor after all. physics of fluids was pure memory work. derivation, experiment, defintions. except 1 or 2 thinking questions.haa. ok.. haha i can rmb some of the ans.. let's see...

Qn 1 : mechanics

Qn 2: Ideal Gas
Temp : 273.15 K
Volume at eqm : 1.35 x 10^6
Weight of air displaced = 1.77 x 10^5 N
Total weight of balloon = 1.77 x 10^5 N
Resultant force = 3850 N
Acceleration = 0.213
Average K.E = 4.72 x 10^-21 J
no of mol = 6.3 x 10^5 mol
Total K.E = 1.80 x 10^9 J

Qn 4: Electric Field
E = 600000 V/m
t = 1.03 x 10^-8
a = 9.81 - (q/m)(600000)
Q/m = 4.74 x 10^7

Qn 5: Nuclear Physics
no of proton = 82
no of neutron = 132
no of atoms = 7.31 x 10^15
decay constant = 4.28 x 10^-4
Activity = 3.13 x 10^12 Bq
Time taken = 13900s

Qn 10: metacentre
torque = 6.50 x 10^6 Nm

____________________________________________________________

Hahah.. looks like wad i predicted din come out.. no superposition, no quantum..
but there was dynamics (1), ideal gas (2), EMI (6), Nuclear Physics (5) and of course Physics of Fluids

tAn+@iBi made the teamtalk at 11/16/2005 03:56:00 PM

Phys paper 1 and 2. Chem paper 2

haha.. juz reached home.. ytd was physics paper 1 and 2.. din hav time to blog bout it. paper ended at 5 plus. went for dinner at j8.. reached home study for today's chem paper liao.. haah so about the phys paper..
phys paper 1 was not too bad. at first some questions struck me. but stil hav to rush a little to complete it. din realli find out how many marks i lost. but seems like quite a few so far already.
phys paper 2 was bad. real bad. especially the op - amp question which i nv come across b4. the data question was also weird. duno wad they wanted.

and today was chem paper 2. not too bad. i finished it quite early. there were only 5 questions. but all carried lots of marks.. especially on transition elements. 16 marks. hah the ionic eqm question so weird. pD instead of pH. Kd instead of Kw. hhaa anw there was electrolysis of brine which i read in depth about for the first time ytd. lucky me. haha. still rmb the asbestos diaphragm. hah. anw i got some ans frm the first question. pls verify.

Kd = 1.35 x 10^-15
[D3O+] = 3.68 x 10^-8
pD = 7.43
moles of HDO at eqm = 1.46
Mr of cpd Y = 90
molecular formula = C3H6O3

Compound Y with optical isomerism

Compound Z
_______________________________________________________________

2 more papers to go. physics paper 3 and chem paper 1. topics i shall study:
1. EMI
2. Dynamics
3. Ideal Gas
4. Quantum
5. Superposition
6. Nuclear Physics
haha juz nice 6 topics for 6 questions. but cannot be too sure. and oh ya.
7. Physics of Fluids. of cuz.

tAn+@iBi made the teamtalk at 11/15/2005 11:07:00 AM

Stokes' Law

In 1851, George Gabriel Stokes derived an expression for the frictional force exerted on spherical objects with very small Reynolds numbers (e.g., very small particles) in a viscous fluid by solving the generally unsolvable Navier-Stokes equations:
F = 6πrηv
where:
F is the frictional force
r is the particle radius
η is the fluid viscosity, and
v is the particles speed
If the particles are falling in the viscous fluid by their own weight, then we can derive their settling velocity by equating this frictional force with the gravitational force:

where:
Vs is the particles settling velocity,
g is the acceleration of gravity,
ρp is the density of the particles, and
ρf is the density of the fluid

tAn+@iBi made the teamtalk at 11/12/2005 12:44:00 PM

GP paper

yay Gp paper is over. how was it? haha i dun noe. it's not for me to judge. unlike maths or sciences whereby if u noe,u noe.. the ambiguity of GP. haha i did the essay on sports.
'Hosting major sporting events create more troubles than benefits'. Do you agree?
haha compre was quite ok. juz tt summary a lil demanding. summarise 4 paragraphs into 120 words. and AQ had too many demands. tt's about all. nothing more to say.
juz looking forward to chem and phys papers. 1 more week! strive.. starve.

tAn+@iBi made the teamtalk at 11/11/2005 12:48:00 PM

Maths paper 2..

haha this paper was far much better than the previous 2.. the easiest of the 3 so far... lolz..
it was a 3 hr paper. but i finished 40mins before.. i thought i missed out qns -.-.. kept checking.. haha even having time to sub back ans to ensure the ans correct..
haha as far as i can remember, my answers were:

1. complex roots of z^4 - 2z^3 + 6z² - 2z + 5 = i, -i , 1 + 2i, 1 - 2i
2. dr/dt = 0.0637 m/s
3. 3sin2x + 2cos2x
root 13. sin(2x + 0.588); k>root 13, k<-root 13 gen soln => x = npi/2 + [(-1)^n]0.141 - 0.294
4. S = 2/3 a
5. approx of roots x = 0.82

22. IVF failure 0.8%
a) P(X=6) = 0.00881
b) P(X=6/X less than 8) = 0.273
23. mass of pineappples qn
a) P(Tless than 11.2) = 0.715
24. length of function a - b(x-1)² tt one
mode = a
why a more than equal to b? bcoz f(x) is equal to 0 or more
25. average 1 flaw in 100m
P(X more than or equal to 3 in 200) = 0.323
Length such tt no P(no flaw) is 0.001 = 691m
P( less than 12 flaws in 2000m) = 0.0287
26. height of popn qn
proven that P(H more than 1.81) is 0.20
80 ppl P(Hbar more than 1.69) = 0.0112
H~N(1.6378, 0.2045²)
27. saw mill qn
pdf : f(x) = { 16.67 , l-0.03 to l +0.03
0 , otherwise
28OR pin drop qn
n=90, Ps = 0.73335
test whether p more than 2/3: yes
p = 0.7 n = 90
P(2nd trial same result as first) = (90C66 )[o.7^66](0.3^24)
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haha such an irony. now that i do not go online as frequent as last time, i blog everyday.
but might as well. to hav some contact with the world. or else i will be devoid of human contact. but again, im blogging. not meeting anyone. prob juz a means of expressing myself. gp tmr. cya

tAn+@iBi made the teamtalk at 11/10/2005 06:03:00 PM

chem paper

haha today was chem paper 3.. wow.. if u say the maths paper was hard.. what was the chem paper? harder lor. tsk tsk. the qns were of another world. some degress of rotation of light. so so many challening qns. the organic deduction qn is a killer. 2 NMR specs and 1 mass spec. cool.. NMR had symmetry. so some were of the same chemical environment. cheaters. thermody qn 1 already lost half the marks. -fly away- if 1 part wrong, the rest wrong. simple? unless there's error carrying forward. hah sympathy and method marks im wishing for. there was even outlining a practical experiment. o.0 i thought SPA was over? well. 7 marks ONLY rite. yeah rite.

wadeva. im going to sleep now. for those who are lucky enough to read this:
TJC HOD Maths Mrs Pang said:
revise these for paper 2.. Maclrn, APGP, complex no. gen soln, vol of revolution, sigma and binomial. and stats of cuz.. -.-

ok.. what about approximation of roots? learn for wad? nvm. juz learn. probably it will come out in the stats part. for eg. what is the probability that ur appoximated root is right? who noes man.. a lvls nowadays.

tAn+@iBi made the teamtalk at 11/09/2005 12:31:00 PM

maths paper

haha the paper was rather challening today. i cld do all in time i guess. except for the functions question. i was thinking too hard.. trying to split the x^2 square into 2 different functions o.0 hhaa.. here are some of the ans i can rmb

trap rule 0.98 something
estimation of area using anothre method = 0.933

P&C 589 and 220

3d trigo = 63 and 127

tan3x = -1/4

if b =1 , t = 1/8 and s = -14/25

b = 2and 1/8 or something in first part.

range (-9w^2 to infinity)

anyone check with me? pls tag..
wahah.. topics coming out: complex, maclaurin series, apgp, approx of roots.

tAn+@iBi made the teamtalk at 11/08/2005 10:08:00 PM

haah.. wad am i doin here? haha. blogging i guess.. ok.. it's the day of the start of the a lvls.. nothing much to say. it says everything. haha.. juz wanna people who hav wished me luck, gave me encouragement, and prayed for me.

here goes in no particular order: Alvin, Vanessa, Shiqi, Seekie, Joanne, Dorothy, Yewting, Priscilyn, Noven, YeeKiat, Jlow, Wendy, KaiLin, Nortilla, LeyHong, Jansen, ShuMin, Sihui, Zun Chen, Charmaine, Elim, Shaun, Gladys.

hope i did not miss out anybody's name. i apologise if i did so..haha.. Thank God for all of them. Hope God will bless them too. and for those who are taking exams too, all the best! =)

3.5hrs or so to my first paper.. =x bye..

tAn+@iBi made the teamtalk at 11/08/2005 10:31:00 AM

The Big Bang Theory. bang! bang!

What is the Big Bang Theory?

The Big Bang Theory is the dominant scientific theory about the origin of the universe. According to the big bang, the universe was created sometime between 10 billion and 20 billion years ago from a cosmic explosion that hurled matter and in all directions.

In 1927, the Belgian priest Georges Lemaître was the first to propose that the universe began with the explosion of a primeval atom. His proposal came after observing the red shift in distant nebulas by astronomers to a model of the universe based on relativity. Years later, Edwin Hubble found experimental evidence to help justify Lemaître's theory. He found that distant galaxies in every direction are going away from us with speeds proportional to their distance.

The big bang was initially suggested because it explains why distant galaxies are traveling away from us at great speeds. The theory also predicts the existence of cosmic background radiation (the glow left over from the explosion itself). The Big Bang Theory received its strongest confirmation when this radiation was discovered in 1964 by Arno Penzias and Robert Wilson, who later won the Nobel Prize for this discovery.

Although the Big Bang Theory is widely accepted, it probably will never be proved; consequentially, leaving a number of tough, unanswered questions.

tAn+@iBi made the teamtalk at 11/07/2005 12:09:00 PM

BEN BEN

isn't BENign BENzene an oxymoron haha..
first benign meaning harmless
and benzene being a carcinogen, meaning it can cause cancers.
so is BENign BENzene possible?
hmm perhaps the tumour growth is benign.
dunno. nvm.
ALL THE BEST TO A LVLS HAHA..

tAn+@iBi made the teamtalk at 11/06/2005 11:32:00 PM

Mendeleev's periodic table

In 1869, just five years after John Newlands put forward his Law of Octaves, a Russian chemist called Dmitri Mendeleev published a periodic table. Mendeleev also arranged the elements known at the time in order of relative atomic mass, but he did some other things that made his table much more successful.

He realised that the physical and chemical properties of elements were related to their atomic mass in a 'periodic' way, and arranged them so that groups of elements with similar properties fell into vertical columns in his table.

Gaps and predictions
Sometimes this method of arranging elements meant there were gaps in his horizontal rows or 'periods'. But instead of seeing this as a problem, Mendeleev thought it simply meant that the elements which belonged in the gaps had not yet been discovered. He was also able to work out the atomic mass of the missing elements, and so predict their properties. And when they were discovered, Mendeleev turned out to be right. For example, he predicted the properties of an undiscovered element that should fit below aluminium in his table. When this element, called gallium, was discovered in 1875 its properties were found to be close to Mendeleev's predictions. Two other predicted elements were later discovered, lending further credit to Mendeleev's table.

The modern periodic table
A table in order of atomic number
Mendeleev's table was nine tenths of the way there, but needed one important modification before it became the modern periodic table - the use of atomic number as the organising principle for the periods.Mendeleev ordered his elements in order of their relative atomic mass, and this gave him some problems. For example, iodine has a lower relative atomic mass than tellurium, so it should come before tellurium in Mendeleev's table - but in order to get iodine in the same group as other elements with similar properties such as fluorine, chlorine and bromine, he had to put it after tellurium, so breaking his own rules.

Using atomic number instead of atomic mass as the organising principle was first proposed by the British chemist Henry Moseley in 1913, and it solved anomalies like this one. Iodine has a higher atomic number than tellurium - so, even though he didn't know why, Mendeleev was right to place it after tellurium after all!

tAn+@iBi made the teamtalk at 11/05/2005 12:43:00 PM

John Newlands' Law of Octaves

An English scientist called John Newlands put forward his law of octaves in 1864. He arranged all the elements known at the time into a table in order of relative atomic mass. When he did this, he found that each element was similar to the element eight places further on. For example, starting at Li, Be is the second element, B is the third and Na is the eighth element.

Part of Newlands' table

Regular repeatsNewlands' table showed a repeating or periodic pattern of properties, but it had problems. For example, he put iron in the same group as oxygen and sulphur, which are two non-metals. As a result, his table was not accepted by other scientists.It was not until Mendeléev published his periodic table that Newlands' law was shown to have a great deal of truth to it.

tAn+@iBi made the teamtalk at 11/04/2005 12:16:00 PM

Human Genome Project

What is it?
The Human Genome Project (HGP) is an international 13-year effort formally begun in October 1990. The project was planned to last 15 years, but rapid technological advances accelerated the completion to 2003. Project goals were to determine the complete sequence of the 3 billion DNA subunits (bases), identify all human genes, and make them accessible for further biological study. As part of the HGP, parallel sequencing was done for selected model organisms such as the bacterium E. coli to help develop the technology and interpret human gene function. The Department of Energy's Human Genome Program and the National Institutes of Health's National Human Genome Research Institute (NHGRI) together sponsored the U.S. Human Genome Project.

Goals of the project:
identify all the approximately 20,000-25,000 genes in human DNA,
determine the sequences of the 3 billion chemical base pairs that make up human DNA,
store this information in databases,
improve tools for data analysis,
transfer related technologies to the private sector, and
address the ethical, legal, and social issues (ELSI) that may arise from the project.

What happens now that the human genome sequence is completed?
The working draft DNA sequence and the more polished 2003 version represent an enormous achievement, akin in scientific importance, some say, to developing the periodic table of elements. And, as in most major scientific advances, much work remains to realize the full potential of the accomplishment.
Early explorations into the human genome, now joined by projects on the genomes of a number of other organisms, are generating data whose volume and complex analyses are unprecedented in biology. Genomic-scale technologies will be needed to study and compare entire genomes, sets of expressed RNAs or proteins, gene families from a large number of species, variation among individuals, and the classes of gene regulatory elements.
Deriving meaningful knowledge from DNA sequence will define biological research through the coming decades and require the expertise and creativity of teams of biologists, chemists, engineers, and computational scientists, among others. A sampling follows of some research challenges in genetics--what we still won't know, even with the full human sequence in hand.
Gene number, exact locations, and functions
Gene regulation
DNA sequence organization
Chromosomal structure and organization
Noncoding DNA types, amount, distribution, information content, and functions
Coordination of gene expression, protein synthesis, and post-translational events
Interaction of proteins in complex molecular machines
Predicted vs experimentally determined gene function
Evolutionary conservation among organisms
Protein conservation (structure and function)
Proteomes (total protein content and function) in organisms
Correlation of SNPs (single-base DNA variations among individuals) with health and disease
Disease-susceptibility prediction based on gene sequence variation
Genes involved in complex traits and multigene diseases
Complex systems biology including microbial consortia useful for environmental restoration
Developmental genetics, genomics

tAn+@iBi made the teamtalk at 11/03/2005 10:48:00 PM