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  1. Dukula Jayasinghe

    How was physics paper 12?

    Thanks man! When is school starting? I mean for u? can i have your fb name or smthing???
  2. Dukula Jayasinghe

    How was physics paper 12?

    Well, overall, I don't care!!!!!!!!!!!!!!!!!!!!!!!!!! Exam is finished so I am gonna enjoy me 12 days holiday until A2 starts. BTW, these are my expectation results,is my A for AS secured? Physics Paper 1 : 33/40 Paper 2 : 55/60 Paper 3 : 35/40 Marine Science Paper 1 : 70/75 Paper 2 : 45/50...
  3. Dukula Jayasinghe

    How was physics paper 12?

    hOW DID u get ur asnwer?
  4. Dukula Jayasinghe

    How was physics paper 12?

    Dude, i am not good in physics. I had to ask the nerds lol!!!
  5. Dukula Jayasinghe

    How was physics paper 12?

    No. I thought like this. 50 teeth, in 1 second , 10 revolutions. 10x50=500. They said frequency was equal to some shit(i guess number of osscilations) or something like that per second, so f = 500 Hz. Yeah. So 330/500 = 0.66m
  6. Dukula Jayasinghe

    How was physics paper 12?

    what did u put? I put 0.66m i think (A)
  7. Dukula Jayasinghe

    How was physics paper 12?

    No, the box thing, i mean the resitivity uncertainty, i asked the nerds, they said C. I just put C :/ . didnt have time. Wiii justpastpapers send the paper tomorrow?
  8. Dukula Jayasinghe

    How was physics paper 12?

    My expectation is around 33 to 35.
  9. Dukula Jayasinghe

    How was p12 9701 2017

    Well, I am getting 39/40 for chemistry 1 since up to now I found out only 31 wrong(careless mistake)
  10. Dukula Jayasinghe

    How was p12 9701 2017

    Well, I am getting 39/40 for chemistry 1 since up to now I found out only 31 wrong(careless mistake)
  11. Dukula Jayasinghe

    How was physics paper 12?

    No man. The resistance block thing. I got it as 0.5. The nerds in our class also got C. Dont know...
  12. Dukula Jayasinghe

    How was physics paper 12?

    And the answer for that question was C ?
  13. Dukula Jayasinghe

    How was p12 9701 2017

    I am getting maximum of 39/40 :(
  14. Dukula Jayasinghe

    How was p12 9701 2017

    I got '31' wrong. I got confused by the question and put D. But correct answer was B. Others were ok i guess.
  15. Dukula Jayasinghe

    How was p12 9701 2017

    What, only 2 calculations was there.
  16. Dukula Jayasinghe

    How was p12 9701 2017

    Many repetitions!!!!!!!!!!!!
  17. Dukula Jayasinghe

    Chemistry: Post your doubts here!

    ORGANIC SHORT NOTES Alkanes Undergoes free radical substitution Ex - Ethane + Cl2 Conditions : UV light Ex - Initiation Cl2 --> 2Cl* Propagation steps : (a) C2H6 + Cl* --> C2H5* + HCl (b) C2H5* + Cl2 --> C2H5Cl + Cl* Termination steps : (a) C2H5* + Cl* --> C2H5Cl (b) Cl* + Cl* --> Cl2...
  18. Dukula Jayasinghe

    Chemistry: Post your doubts here!

    The answer should be C. This is because of the Markonokov addition principle of alkenes. It states that when a H-X (where X can be any halogen) reacts with an alkene, the X shoould go and bond with the carbon containg more alkyl groups attatched to it. This can be seen in the mechanism. During...
  19. Dukula Jayasinghe

    Chemistry: Post your doubts here!

    NO. you must know this equation WHEN CHLORINE REACTS WITH HOT CONCERNTRATED NAOH 6NaOH + 3Cl2 --> NaClO3 + 5NaCl + 3H2O When chlorine reacrs with cold aquos NAOH 2NaOH + Cl2 --> NaClO + NaCl + H2O According to answers givn (C)
  20. Dukula Jayasinghe

    Chemistry: Post your doubts here!

    Well, lets look upon (D) first, shall we? Now when the tap B is open, what will happen is pressure decreases as well as N2 concerntration decreases cos Li+N2 will occur. Position of equilibrium shifts to the left, causing % of NH3 to decrease. (D) is wrong. Looking upon (C) When A is open...
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