PSLE trival

October 14, 2004 at 9:22 pm 9 comments

Recently people have been writing to the Straits Times forum pages lamenting the difficulty of PSLE questions. Come to think of it, it has been 4 years since cheeky took his PSLE ( yah right ). Anyway, someone cited an example to bring across his/her point.

Question: A rod, half of which is made of iron, the other half made of wood is balanced in the middle. Will the iron part go up or down when heated.

Hey come on, there’s no need to bang your head in shame. Just show some respect to the kid standing next to you when taking the train.

Illogical simplified answer: When iron is heated, it expand ( like cheeky’s waistline ). Now, what happened when you have a ever expanding waistline? Well, for a start your weighing scale malfunction the moment you step on it. Which means you have gained weight and which means the iron part has become heavier and will tips down.

Smarty pant answer: Iron when heated, will expand. Thus, the iron portion will now be longer and, using moments, it will move down. On the other hand, heating up the iron portion will cause a convention current in the surrounding air, resulting in a force pushing the metal upwards. The metal rod could go either way, or remain in its original position.

(yah, I know, what the fuck?)

Logical answer: When the iron portion is heated, it will expand, causing the rod’s centre of gravity to shift towards the metal side. Thus the iron portion will tips down.

Brother Love’s answer: Let me tell you about my ‘rod’. It can expand way beyond… ( beeps………. censored )

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Buaya 101 Wrong number lah

9 Comments Add your own

  • 1. emily  |  October 19, 2004 at 8:33 pm

    Haha. Very interesting post. And all of it makes loads of sense, each in its own unique way!

    Reply
  • 2. Puppy DJ  |  February 2, 2005 at 5:45 am

    Hey, I did the PSLE last year. It wasn’t that bad.

    Reply
  • 3. Shion  |  February 16, 2005 at 5:27 pm

    How can they balance a rod half make of metal and half make of wood in the middle ???

    Metal is heavier than wood , no ? Then how to balnce in the middle ??

    Reply
  • 4. Magecut  |  April 5, 2005 at 3:47 am

    lol…funny. weird. fun. interesting. definitely. and shion, they can balance if they’re of the same weight. but one side will be bigger than the other…a bit weird, i agree. but all the same…

    Reply
  • 5. hL  |  April 27, 2005 at 9:23 am

    i think the rod is such that half is metal and the other half is wood from one end to the other end of the rod, so that there are equal amounts of metal and wood on both sides if balanced in the middle. i guess the confusion arose when people thought that the rod was half metal and half wood, ie balanced such that the metal on one end is on one side, the wood on the other end on the other side.

    Reply
  • 6. dupechup  |  May 1, 2005 at 9:03 pm

    HAhaha……I did the PSLE 3 years ago….Those ain’t have no common sense can’t answer such questions!Duh!You’re taking an exams and if you expect it to be easy….then don’t take!

    Reply
  • 7. dupechup  |  May 1, 2005 at 9:03 pm

    HAhaha……I did the PSLE 3 years ago….Those ain’t have no common sense can’t answer such questions!Duh!You’re taking an exams and if you expect it to be easy….then don’t take!

    Reply
  • 8. Mrs Reeves  |  July 18, 2005 at 8:01 pm

    HAHAHAHHAAHAHAHAHA omg……….. that’s so funny!!!

    Reply
  • 9. rayfee  |  October 3, 2007 at 12:16 pm

    gyaa?got questions like that?i taking my psle this year. oh wait science psle on monday!!!

    Reply

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