White / photography.

w h i t e

A story of black & white
but i'll prefer white

16/Sep/09

Wednesday, September 16, 2009 { 4:11 PM }

Last paper for prelims is finished.

Well, I think the one week holiday somehow screwed my attitude towards studying le.

No motivation to study now.

Maybe really need to screw some tests then can feel the pressure.

Lols,actually this was my tactic to get good results for EOY examinations when I was in primary school.

Haha.

Yesterday I had a good time surfing the net.

Wikipedia, along with Google and Baidu enriched my night in terms of knowledge.

There was a quite interesting physics question which I came across yesterday while surfing.

Spent like 15mins doing , but to no avail. lols

After looked through the answer, then I realised I have not mastered my physics yet.

I will post the question at the end of the post.

Yeah, because of the fun I had last night..

I went to bed at 2.15am and only managed to sleep around 3+..

Had a hard time waking up this morning..

Thanks to Xinwei's alarm clock.. LOL!!!

After the paper finished, headed home and it was only 10am..

Watched Hancock and Death.Race in computer.

Death.Race is nice, super nice if you like cars and excitement.

And Im blogging now.

I wanted to go gym but darryl and his group had too much fun playing maple, dun wan go liao..

Zzzzz..

Okay, actually I wanted to post my views for the topic on Human Evolution, but somehow I feel lazy and Im also not so contented in the topic.

So~~

Lastly, the physics question. On electricity, D.C circuits.

Which I think it really tests one's concept quite well.

Btw, I translated it from Chinese. Hehe.

Two components,with resistance R1 And R2. It is known that R1>R2.

The two components are connected to a complete circuit with cells, in an unknown way.

When connected, R1 has power rating of 16W, the voltage across R2 is 8V.

Then, the two components are connected to the circuit in another way, with the same cells.

This time , R2 has power rating of 100W.

Find.

(1) The voltage of the cells.

(2)Resistance of R1.

Answer:

(1)40v

(2)64Ω

It is not easy and the working is tedious.

If you wan the working, give the question to Wangleng and he will tell you the answer..

LOL!!!

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