On Science

I am a huge fan of science.

But I have never gone to such mad and extreme, extents to carry out scientific experiments.

But, this person has!

Please take a look at this site and give me your comments.

http://www.keypad.org/bunnies/

Utterly cruel! Urgh!

xinyi

Answer to the science question!

Ok! After a search on yahoo, I've found the answer. It's not a very exciting answer, to be honest.

Here goes.

When the dry ice(frozen carbon dioxide) comes in contact with a metal surface,

the metal surface was at a higher temperature than the dry ice.

Therefore, this will cause a very rapid sublimation on the dry ice.

Since dry ice=CO2, alot of CO2 will be produced. Especially at the part where the dry ice is in direct contact with the metal surface.

As a result, the dry ice will be pushed off the metal surface, due to the huge amount of gas below it that's rising rapidly.

As soon as the gas below the floating dry ice rises and diffuses off into the atmosphere,

The piece of dry ice drops, of course. And produces a sound.

And this will cause it to touch the metal surface again, producing alot more CO2, etc etc, and the cycle continues again!

But of course, this process happens extremely quickly and repeats itself over and over again, producing the vibration and the rattling sound, until all the dry ice has been sublimated.

As to dry ice on plastic... I haven't found any answers on the internet yet.

Hmm. Plastic is a bad conductor of heat, right? okie wait ah lemme think...

so. Maybe the heat from the plastic doesn't go to the dry ice as fast as metal? (coz it's a bad conductor of heat, metal is a good conductor of heat.) Just think of yourself holding 2 identical spoons getting heated at the same end. One is made of metal, the other is made of plastic. Obviously, the hand holding the metal spoon will feel the heat much faster. ^_^

Not enough heat-->dry ice sublimes almost normally-->Not enough CO2 gas produced to push it off the spoon-->No rattling sound.--->No fun.

xinyi

National Day Blazare

Hey folks, back with a post to liven up the blog. Today's a great day with many interesting happenings.

First up, in school, we had a whole series of events lined up for us. We had the CHIMO Project Runway Competition which featured 3 students per Upper Sec class modelling the ethnic costumes that their classmates had mixed and match for them. So glad that my class got 3rd prize!

This was followed by programmes in the hall. We had the usual national day recitation. However, it was acted out by the drama club members which made it more interesting. We had a performance by the school choir. Well done Samantha! Yeah, we got to see the talents of students through TK Idol grand finals....guess what 3e6 won the title.

The announcement of the best dressed male and female teachers shocked most especially the news that photoshop was one of the best dressed teachers. I thought that his dressing was terrible. It looked like a bathrobe, an emperor's cloak. In conclusion, "golden freak or chicken" seems to be the word to discribe him. Rather fuuny, provided quite a bit of entertainment and caused much uproar!

After school, we went to Bugis to celebrate Sabrina's belated birthday. Having lunch at PastaMania before buying our robotics T-shirts and taking neoprints, we had a ball of a time. By the way, have you ever wondered why a snorous sound is created and the dry ice vibrates when it is in contact with a dry metal spoon? It does not happen when in contact with a dry plastic spoon. Yet to figure out the answer.

Yep, that's about all from me. Stay cool, work smart and play hard! Cheers!

-GCL-