Tuesday, April 7, 2009

A busy day

It was really a busy day.BUSY has occupied my mind and soul.I really do not know whether i got time to study or not.At the same time,i am quite busy recently.I am a normal treasurer of scout and i need to collect registration free (RM 5) for scout.Sometime i was very frustrated on the junior's attitude.I ask them to pay money,they do not want to pay.I want to find them,they will disappear (maybe ponteng).Becoming a treasurer was not really an easy thing.A lot of people will said becoming treasurer was damn easy and carefree.WHO SAID?IS damn lot of things to do.........
Even though it was hard,but i still going to'' accomplice my mission''

After school,i had a patrol meeting at canteen.This time,Chok Dong becomes my PL.WAH...damn geng liao loh....i was quite excited because the camp got pioneering projects which i liked the most.Our patrol is going to build a tower.It needs a lot of square lashings and also other lashings that are important in buliding the tower.Hence,i need to make sure my lashing must be damn good.
In this camp,i will going to unleash my super power and potential so that other people will get shocked.This will be my last camp in school,after this i would not be a senior anymore.So i must appreciate this wonderful camp....
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Monday, April 6, 2009

school day

You may not realize that going school is the most tedious things..That type of bores is so unimaginable.....Boring until you want to sleep......Boring until you want eat...Boring until you want to go back home......damn SIENz....SPM got so many subjects.Even though it is quite easy(only for science and math),but too many subjects liao..cannot concentrate.....Compare with my brother,STPM is better even though it is very hard.....The syallabus for STPM are specialized..like that only i can concentrate...............

I very hope i can finish my SPM faster so that i can go STPM.....FASTER LAH..........
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Sunday, April 5, 2009

Tuition..

Today i went for tuition.The subjects are physics and additional mathematics.Mr Peeter was my physics teacher at Cekap.He taught the new chapter--electromagnetism.This chapter is damn tough and hard to understand.Last chapter--electricity i also not really understand already,some more i need to learn new chapter which is hard.Damn it lah!!!HaHa....After physics,i have ADD MATH class with Mr Chin.He taught trigonometric function.......very hard men..die loh.I can see that the add math chapters are getting harder and harder.....But anyway,i will study very hard to get good result in Percubaan SPM and REAL SPM.11A1!!!!!!!!!!!!HaHa.......!!!!!!!
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Saturday, April 4, 2009

Taxonomy


Today,Thomas just teach me about taxonomy.It is quite tough.......because i never heard this thing before.But now i start to understand about it.......
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Properties of alkanes


3-dimensional model of of methane,CH4


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STUDY DAY

Today,i had a group study with my fellow friends such as Jen Weng ,Thomas ,Meng wai .It was fun ,useful and effective.I will work harder to achieve good result in SPM.HaHa............11A1 is my aim....and i believe that i can do it!!

We study chemistry,biology and physics together....It was very hard(because we all forgot liao..lolz).So,this group study has helped me and friends a lot..it can refresh my form 4 work,especially form 4 biology....wah crazy men....want to die...just chapter 8 only...but never mind..now i can remember liao..haha

We also learn about periodic table....i almost forgot liao...lucky now i can refresh again...If all of us are able to remain and appreciate this gruop study,i believe all of us can achieve good results....YEAH!!thank you everyone...


PERIODIC TABLE OF CHEMISTRY...
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AMAZING DAY

Today i go to internet and search some information for mathematics.After learning the integration in additional mathematics,i feel very excited and enjoyed because i had learnt something new.INTEGRATION is important in the field of calculus,and more broadly,mathematical analysis.Integration is quite a tough chapter but if you know the concepts ,it will be easy....After coming back from Jen Weng's house,i got nothing to do.Hence,i go to internet and search something that are relevant to science and mathematics.It is fun......but i realize somethings...actually our integration in SPM is not even a basic or foundation..the internet info about integration are damn crazy and hard.....STUPID....and i also discover that integration concepts are also involve in volume formula deviation..Here are some example......


VOLUME OF SPHERE

The volume of a sphere is the integral of infinitesimal circular slabs of thickness dx. The calculation for the volume of a sphere with center 0 and radius r is as follows.

The radius of the circular slabs is y = \sqrt{r^2-x^2}

The surface area of the circular slab is πy2.

The volume of the sphere can be calculated as \int_{-r}^r \pi(r^2-x^2) \,dx = \int_{-r}^r \pi r^2\,dx - \int_{-r}^r \pi x^2 \,dx

Now \int_{-r}^r \pi r^2\,dx = 2\pi r^3
and \int_{-r}^r \pi x^2 \,dx = 2 \pi \frac{r^3}{3}

Combining yields \left(2-\frac{2}{3}\right)\pi r^3 = \frac{4}{3}\pi r^3

This formula can be derived more quickly using the formula for the sphere's surface area, which is 4πr2. The volume of the sphere consists of layers of infinitesimal spherical slabs, and the sphere volume is equal to

\int_0^r 4\pi r^2 \,dr = \frac{4}{3}\pi r^3


VOLUME OF CONE

The volume of a cone is the integral of infinitesimal circular slabs of thickness dx. The calculation for the volume of a cone of height h, whose base is centered at (0,0) with radius r is as follows.

The radius of each circular slab is \begin{cases} r, & \mbox{if }\mbox{ x=0} \\ 0, & \mbox{if }\mbox{ x=h} \end{cases}, and varying linearly in between -- that is, r\frac{(h-x)}{h}

The surface area of the circular slab is then \pi \left(r\frac{(h-x)}{h}\right)^2 = \pi r^2\frac{(h-x)^2}{h^2}

The volume of the cone can then be calculated as \int_{0}^h \pi r^2\frac{(h-x)^2}{h^2} dx

Substituting u = h − x gives an integral with reversed limits, and dx = − du: that is, \int_{h}^0 \pi r^2\frac{u^2}{h^2} (-du)

Swapping the limits makes this -\int_{0}^h \pi r^2\frac{u^2}{h^2} (-du) = \int_{0}^h \pi r^2\frac{u^2}{h^2} du = \frac{\pi r^2}{h^2}\int_{0}^h u^2 du

Integrating gives us \frac{\pi r^2}{h^2}\left(\frac{h^3}{3}\right) = \frac{1}{3}\pi r^2 h

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