Tuesday, February 22, 2011
Besides the serious stuff, we learnt three important things ytd in physics O.
1) How to create a black hole.
"Suppose we have a rice cooker, and we heat the rice cooker up by T kelvins. Then the new volume of the rice cooker will be V2 = V1(1+γΔT). Where γ is the volumetric thermal expansion coefficient. So applying the same equation, when the rice cooker cools down, we'll get V3 = V2(1-γΔT) = V1(1-γ2ΔT2), which is smaller than V1. So, if you have a rice cooker, and you heat it up and cool it down, and heat it up and cool it down, and heat it up and cool it down, and heat it up and cool it down... and after a few months when you come back, and.... "Hey... where is my rice cooker.....?" "
*Of course something screwed up here.
2)Second law of thermodynamics.
"Some people say that the second law of thermodynamics contradicts the theory of evolutions. In the theory of evolution, man gets more handsome, and this means entropy decreases... But, if we look at the second law, we see that it only says that the total entropy of the universe must increase. So, in this case, only the entropy of the system decreases, so the law still holds, since the entropy of environment increases, since when people get more handsome the more chaotic it is. So..., the point here is that if you want to save the environment, if you want to go green....... "
3)Third law of thermodynamics.
This one is not by the teacher, so its short(and lame).
The third law of thermodynamics is a pessimistic one, since it implies that nothing will ever by OK. (zero degrees kelvin)
For some reason we were all super hyper after the lesson, and Yu Jia decided to take the lift even though she lives on the second floor.
So after she left Jee Hyun was saying "At least I'm on the third floor...".
Then Wayne responded, "EH, my floor is 22 leh."
Yu Jian, "Ya... totally (-.-), mine 23 you know."
And after that we went nuts and got everyone's floor in binary numbers
1st storey (Phan, she took stairs) = 20
2nd storey (Yu Jia) = 21
3rd storey (Jee Hyun) = 22+20
4th storey (Wayne) = 22
6th storey (Timothy) = 22+21
8th storey (Me and Yu Jian) = 23
12th storey (Gloria) = 23+22
*Of course, ur susposed to be able to express all numbers wif binary nums
Aww, thats what you get when you put a bunch of physics O students in a lift anyway.
Oh and
"I'm gonna go find YOU and have lots of fun! No not Phan, not interested." - Yu Jian
(There's a guy called Ryan You in our cluster and a girl called Phan (pronouned 'fun') in our mentor group.)