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Recent content by Daniel Jeng

  1. Daniel Jeng

    Physics: Post your doubts here!

    First use Q=It to obtain the current through the circuit. Then find the resistance of R. Use the equation of E=I^2Rt, by combining the equations P=VI=I^2R and E=VIt together. Plug the values of the I, R and E (given in the question) into E=I(R+r) (the equation you written there), and you...
  2. Daniel Jeng

    Chemistry: Post your doubts here!

    You may have thought that there would only be 3 isomers instead of 4 isomers, however there is an extra twist to this question: there are two isomers for the variation in which 2 chloro groups are next to each other. The chloro groups may bond to neighbouring carbon atoms that have a double bond...
  3. Daniel Jeng

    Physics: Post your doubts here!

    Figure out the vertical component of the velocity first. The vertical component of the velocity is 50sin23. Now you know the rate at which the height of the plane increases. Now just use GPE=mgh, to find the potential energy increase per unit time. This will be equal to 1.2x10^5x9.81x50sin23...
  4. Daniel Jeng

    Physics: Post your doubts here!

    By Kirchhoff's law of the conservation of charge, the current in wire R must be 2A into the junction, as current in=current out. To figure out the charge passing through the wire Q the equation Q=It can be used, so the charge passing through Q would be 2x5=10C. Therefore the answer will be D, 10C.
  5. Daniel Jeng

    2 exams down, 4 to go

    2 exams down, 4 to go
  6. Daniel Jeng

    CHEMISTRY PAPER 5 REVISION

    I guess I might as well answer it here, but you should post any questions later in the post your doubts section rather than in inactive threads. Chemistry p5 is tomorrow anyways, so I guess there's no point... What do you mean by b)i? I will be assuming its 1b)i, as the one in question 2 is...
  7. Daniel Jeng

    Physics: Post your doubts here!

    Thought I'd just make D a little clearer: the main problem is the sun overheating the satellite, rather than freezing, ironically.
  8. Daniel Jeng

    Chemistry: Post your doubts here!

    I'm really late, but I'll still explain it seeing that the chem p5 is tomorrow. I think the enthalpy of reaction would become more exothermic as Ecell increases, since the oxidation and reduction of the two species occurs more readily in those cases.
  9. Daniel Jeng

    Physics: Post your doubts here!

    A is incorrect because microwaves have more energy than radio waves. This means that the microwaves have a higher frequency and therefore lower wavelength. C is incorrect as all electromagnetic waves travel at the same speed in space i.e. 3x10^8 ms^-1. And D is just absolutely ridiculous. By way...
  10. Daniel Jeng

    PS4 Gamers

    Might as well be the first post here, my PSN ID is KoiNoKaze. I mostly play on the PS4 and PS vita although I do have a PS3 as well. The game I'm most excited about is probably Sen no Kiseki III, waiting for the chinese localisation so I can play.
  11. Daniel Jeng

    Whats on your CTRL+ V ; )

    https://www.xtremepapers.com/community/threads/chemistry-post-your-doubts-here.9859/
  12. Daniel Jeng

    CHEMISTRY PAPER 5 REVISION

    Ask here --------> https://www.xtremepapers.com/community/threads/chemistry-post-your-doubts-here.9859/
  13. Daniel Jeng

    PLEASE HELP ME!!! Repeating chemistry !!!

    You're welcome :) good luck on your future endeavours.
  14. Daniel Jeng

    9702 w17 p43 post-exam discussion

    The paper itself was quite challenging, especially the capacitor and resistor in parallel question. I would suspect an A grade threshold for the paper to be around 56-58, probably not reaching 60.
  15. Daniel Jeng

    Physics: Post your doubts here!

    You're welcome :) currently not faring well with literature -.-
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