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  1. autumnsakura

    I see... :) i'm taking bio, physic, math and chem. Are you taking it during oct/nov 2012 as...

    I see... :) i'm taking bio, physic, math and chem. Are you taking it during oct/nov 2012 as well? I'm taking the AS level first though
  2. autumnsakura

    Just wanted to ask if you're from India? I'm from Malaysia :)

    Just wanted to ask if you're from India? I'm from Malaysia :)
  3. autumnsakura

    physics help needed on basic electronic principles

    okay, if the power is 7.2 W means current is 0.3A. I1 and I2 should be 0.13 and 0.17A. V=IR means total R of circuit is 80 ohm. Across the parallel circuit, total R is 1/20 +1/15=7/60. Inverse that and R = 8.6 ohm. So Rx = Total R of circuit - R of parallel circuit= 71.4 ohm. That should be the...
  4. autumnsakura

    physics help needed on basic electronic principles

    You need to find current that splits into the first junction(into the first parallel set and the 25 ohm resistor). Then use V=IR to find voltage
  5. autumnsakura

    physics help needed on basic electronic principles

    I see. Physics in A-level is useful huh? Anyway, potential divider is used to divide supply voltage into values required in individual resistors. It has a formula, not really a theory(haha, called it theory as in understanding of the formula and how it works). V of a certain resistor= Value of...
  6. autumnsakura

    Hey :D

    Hey :D
  7. autumnsakura

    physics help needed on basic electronic principles

    For third question: (a) P : VI =40 x 3=120 W (b) (c)(d)Total R of circuit: V/I: 13.33 ohmn 13.33- 10= 3.33 ohm (total R for parallel circuit) 1/20 + 1/ 5+ 1/R3= 1/3.33 R3= 20 ohm (Had to solve this first to find current split into each resistor)...
  8. autumnsakura

    P1 MCQ's preparation thread for chemistry ONLY!!!!

    Q.26: You have to consider that there's an intermediate so there's two humps. The front hump is always higher than the second hump. I'm not sure why but it's just a basic rule, I think. XD Q.27: Hydrolysis means substituting Br with OH group. So if all the Br are substituted, they would give...
  9. autumnsakura

    physics help needed on basic electronic principles

    For the first file (a) for the parallel circuit it is 1/20 +1/20=1/10 So inverse that and you get 10 ohm. So total resistance is 20 ohm (b) voltage drop means change of voltage from one end of the resistor to the other.Since total R is 20 ohm, and there's equally 10 ohm and 10 ohm(parallel...
  10. autumnsakura

    Physics: Post your doubts here!

    thanks!
  11. autumnsakura

    Physics: Post your doubts here!

    Oh, I forgot to ask. For speed of approach=speed of separation, the formula is u1-u2 = v2-v1 right? As you showed previously.. So I can't use m1u1 + m2u2 = m1v1 + m2v2 ?
  12. autumnsakura

    Physics: Post your doubts here!

    Thank you soo much :D
  13. autumnsakura

    Physics: Post your doubts here!

    Can anyone help clarify? For Q4, why is the answer D not B? For Q10, Why is it not A but D? Thanks!! :)
  14. autumnsakura

    Take out just one letter from the previous word to create a new word! =)

    pest
  15. autumnsakura

    Word Association game

    lunatics!
  16. autumnsakura

    Physics: Post your doubts here!

    2(D) Use s=ut + 1/2 at^2. Sub in time from c(ii) and acceleration from c(i). Your answer should be s=12.71cm. But the length of the metal plates is only 12cm. Since s calculated is longer than metal plates, electron will emerge from plates. 5(c) I'm not so sure. My answer for you would be...
  17. autumnsakura

    Physics: Post your doubts here!

    The easiest way to do this is to substitute V with a number such as 10. So X would be 10 cos angle and Y would be 10 sin angle. Substitute in two angles, for example 30 degrees and 60 degrees. Then compare the X and Y obtained from the two different angles. :)
  18. autumnsakura

    Physics: Post your doubts here!

    http://olevel.sourceforge.net/papers/ Look for subject code 9702
  19. autumnsakura

    Word Association game

    braid
  20. autumnsakura

    King of the Hill [forum game]

    Autumnsakura escapes and brings back an army to seize minato112. Minato112 becomes soo scared, he runs away! My hill!
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