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  1. DragonCub

    I am moving in !

    Why does it take longer time to finish IGCSE than A-levels??? Less time for the harder one?
  2. DragonCub

    Attendance Register

    Present.
  3. DragonCub

    help with math mechanics paper4 m/j 03 question!!!!!!please!

    (Re) Solution to paper4 m/j 03 Q6(iv) As figured out in (iii), AB = 20m and acceleration (a) is still -0.25ms^(-2). Here the equation v^2 = u^2 + 2as is required. v = 3.5 m/s, a = -0.25ms^(-2) and s = AB = 20m So (3.5)^2 = u^2 + 2 * (-0.25) * 20 12.25 = u^2 - 10 u^2 = 22.25 u ≈ 4.72 m/s Hope I...
  4. DragonCub

    help with math mechanics paper4 m/j 03 question!!!!!!please!

    (Re) Solution to paper4 m/j 03 Q5(ii) As we can see, A's weight (Wa) = B's weight (Wb) = 2N. So total weight (W) = 4N When S1 cut, the total resistance = 0.2N + 0.4N = 0.6N So resultant force = 4N - 0.6N = 3.4N Use F = ma, m = total mass (string mass negligible) = 0.2kg + 0.2kg = 0.4kg a = F/m...
  5. DragonCub

    Hydrogen Bonding--chemistry

    Well I think in this problem the intensity of H-bond is not the only factor to be concerned. It is true that the H...F bond in hydrogen fluoride is stronger than the H...O in water, yet we ought to realise that between each two molecules in HF and H2O respectively, there are TWO H...O bonds yet...
  6. DragonCub

    Is there any changes of syllabus?

    My Chemistry teacher has given me an outline of the syllabus at the start of AS, the same as those in previous years. It can be sure that the syllabus stays unchanged.
  7. DragonCub

    vector question of physics

    (Re) Solution to the angle size This one is actually relatively simple. You just get to use trignometry. Here, I've written it in a JPEG file as the attachment. Check it out and may my writing not confuse you :P And by the way, I'm a new comer here. Glad to meet you buddy! :D
  8. DragonCub

    Hi everyone!

    Here I come to Register! My name: Jason Zu Age: 16 Come from: China (May be some linguistic issues, sorry :P) Last year to prepare for the IGCSE exams I first came to find this website rich in resources - all the past papers I downloaded were from here. And 1 year later I learned there's a...
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