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  1. Z

    Chemistry percentage marks for each paper plz

    Paper 1 = 25% Paper 2 = 50% Paper 4 = 25%
  2. Z

    biology notes..

    Thanks a lot. This really should help. But these notes are not complete. Its only up chapter 11 where as the syllabus stated theres 17 chapters. Where i can get the remaining notes. Thanks again.
  3. Z

    Chemistry Paper 2 discussion =)

    Hey, umm, the mass was 5.1 i think..and u got the empircal formula correct..and the concentration was 2.25 x 10^-3
  4. Z

    Chemistry Paper 2 discussion =)

    The very last question. SO2 + O2 <==> SO3 What is the effect of increase in temperature? (I forgot the exact question). I said that more SO2 and O2 will be produced. Is that correct?
  5. Z

    Physics Paper 2

    Why use 12? Isn't it suppose to be 5 since is perpendicular distance from the pivot?
  6. Z

    Physics Paper 2

    Hey Pals_1010, i cudn't think of any ways to find out the force R to cancel the moment. I assumed since both forces acting from the same point, the same force anticlockwise will cancel it. (I used F1D1=F2D2). How did u get 350?
  7. Z

    Physics Paper 2

    FIREMAN QUESTION. Is Moment M = 4200Nm? Is Force R to cancel out Moment M = 840N? Is the third factor~~ = Weight of the ladder?
  8. Z

    Physics Paper 2

    Yah, i wrote that resistance increases too. I remember my teacher always mentioning this.
  9. Z

    Physics Paper 2

    Yea, i was cracking my head over this one. I don't know what i answered for how the resistance change as brightness increases. And for the "how does using a variable resistor protects the filament bulb?", i said voltage across the bulb is slowly increased so the filament does get overheated. I...
  10. Z

    Physics Paper 2

    I used -47m/s to find the acceleration a = ( - 47)/ 0.0013 I got a big number as well( in fact its a very small number since its negative). But it make sense, the ball DECELERATES so much that it goes from 25 to - 22 in such a small amount of time. I just worried whether i wrote the unit for...
  11. Z

    Physics Paper 2

    First Question. (Cricket) Isn't the change in velocity should be 47m/s? Since they are asking for change in VELOCITY, NOT SPEED. The ball is moving forward at a speed of 25m/s (velocity = 25m/s) The ball its hit to the OPPOSITE direction and it travels at the speed of 22m/s (velocity = -22m/s)...
  12. Z

    Physics Paper 2

    First of all its 10 degress. And the magnitude shud be correct but ur direction is wrong. U shud use the parallelogram method. Complete a parallelogram from the 2 forces and the resultant force is the diagonal from the top left corner to the bottom left corner
  13. Z

    Physics Paper 2

    Yes, ur acceleration supposed to be a negative value. And u should remove the negative sign when using the F=MA formula
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