“Dad, is it really so that mass depends on energy?”, C. Adler, an American physicist was asked by his son.

“No! Or rather - yes. Actually it doesn’t, but don't tell your teacher about it”, C. Adler answered.

The next day the physicist’s son stopped studying physics.


From the article by L.B. Okun, published in the “Advances in Physical Sciences”, vol. 158, issue 3, 1989, pp. 511-530

Wednesday, 30 November 2011

fight till the end.

Assalamualaikum..
syukur Alhamdulillah, dpnjgkn umur, dimurhkn rezeki..
salam Maal Hijrah..
tahniah kt abg, Fattah coz grade dr UMS hr ni..
dh smpai masanya gilirn ak yg graduate..
i will do my best for my future, family and yun..
so that i can get a better job..
for yun, thanks 4evrything you hv done..
i need to achieve a lot of things,
Thanks be part of my heart,
i'm really happy with you,
pray for me and give me some spirit.

Estoy Enamorado de ti..

with Love,
erul

Friday, 23 September 2011

If and only if i can re..


If i can reborn for the second time,
i will pray to meet a person like you,
that can make me control my heart beat independently,
and light up my sad life,

If i can reborn for a third time,
i can't promise that i'll not hurt you,
but i can promise i'll care about you,
sharing a good things every second with you,
as long as i can breath and my eyes can see,

If i can reborn for a fourth time,
i will dive deep in the ocean,
i'm not searching the hidden pearl like Kino in ‘The Pearl’ for you,
actually, i’m looking for a little mermaid like you,

Do you think that anyone in this world do everything exactly the same what i did to you??
i don't want your answer, enough with your smile,
displacement never feel long for you,  

It's impossible to reborn a thousand more times,
but i believe in chance and forgiveness..


with love,
-erul

Monday, 19 September 2011

Island in the sun

Hip hip
Hip hip
Hip hip
Hip hip

When you're on a holiday
You can't find the words to say
All the things that come to you
And I wanna feel it too

On an island in the sun
We'll be playing and having fun
And it makes me feel so fine
I can't control my brain

Hip hip
Hip hip

When you're on a golden sea
You don't need no memory
Just a place to call your own
As we drift into the zone
[ Lyrics from: http://www.lyricsmode.com/lyrics/w/weezer/island_in_the_sun.html ]
On an island in the sun
We'll be playing and having fun
And it makes me feel so fine
I can't control my brain

We'll run away together
We'll spend some time forever
We'll never feel bad anymore

Hip hip
Hip hip
Hip hip

On an island in the sun
We'll be playing and having fun
And it makes me feel so fine
I can't control my brain

We'll run away together
We'll spend some time forever
We'll never feel bad any more

Hip Hip

We'll never feel bad anymore..

Monday, 18 July 2011

How to make a simple bamboo cannon?

Introduction:
By simple definition, bamboo cannon is a traditional firecracker made up from 4' long bamboo with inner diameter around 4" to 6".  Like other fireworks, bamboo cannons are illegal as stated in Malaysian Explosive Act 1957.


Materials and Apparatus: 

  1. 4' long bamboo
  2. Saw
  3. Calcium carbide
  4. Water
Procedures:
Bamboo cannon
  1. Cut a bamboo to 4' long.
  2. Make a hole in front at one sides until the other sides except the last bamboo barrier.
  3. Drill a small hole for ignition at one end.
  4. Place the calcium carbide inside from the front. 
  5. Pour a small amount of water in the hole.
Chemical reaction:
CaC2 + 2H2O → C2H2 + Ca(OH)2

Reaction of calcium carbide with water produced acetylene and carbon dioxide. Acetylene is a explosive gas with triple bond hydrocarbon. This reaction was discovered by  Friedrich Wöhler in 1862.
  • Use a small amount of water, the volume of water need for the reaction can be calculate from the mass of calcium carbide with the stoichiometric ratio.
Safety precaution:
Use a long rod to ignite the explosive gas.

Wednesday, 22 June 2011

Freshwater fish part 2 - TAPAH

Ikan Tapah

Fish files;


Length: Up to almost 2.4 meters.

Weight: Up to 110 lb


Colour: Big head with wide lips, small eyes, two spine, long fin below the body.
Population: South Asia, Pakistan to Vietnam, Malaysia, and Indonesia.

*Can be found in Rajang River, Sarawak.