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  1. richman92

    Share your 2010 ATAR here

    atar 99.10 happy one question: how do u know your state ranks?
  2. richman92

    Esterification Experiment?

    Well. read throught textbooks. Basically, we use a reflux appratus to produce esters. Becase the product (ester) and the reactant (alcohol) are volatile then they would escape as they turn into vapours during heating. Then the vapour would be cooled and condensed to liquid and drop back to...
  3. richman92

    2010 HSC Chemistry Revising Marathon

    i think it is not a voltmeter but actually a galvanometer (a ampermeter) which measures the current
  4. richman92

    chem quesiton

    not so hard... case 1, moles of Al = 10/27 = 0.37 moles 2Al + 3H2SO4 --> Al2(SO4)3 + 3H2 0.37 3/2*0.37 1/2*0.37 3/2*0.37 moles 0.37 0.55 0.185 0.55 moles mass of Al2(SO4)3 = 0.185 * (27*2+ (32+16*4)*3) = 0.185 * 342 =...
  5. richman92

    4 Unit Revising Marathon HSC '10

    A and B complex or real ?
  6. richman92

    Q's regarding 1st two Dotpoints of PoM.

    2. Catalysts are required to decrease the required temperature. Eg thermal cracking with no catalysts involved requires 700-1000 C while the other one is about 500 3.yes 5. cause different conditions create different products for example, thermal cracking (700-1000C) : C11H24 -> 4C2H4 + C3H6 +...
  7. richman92

    space question

    F = m*a = GmM/r^2 Hence a = GM/(r^2) r = sqr(GM/a)
  8. richman92

    Supported texts ???

    Sydney Opera House, i did it last year
  9. richman92

    3D trig

    From A to B, two railway stations, the line runs south west. Two spires, 3km a part are both N-W of A. From B, the bearings of the spires are N 7.5degree E and N 37.5 E. Shows that AB = 6 sin52.5 cos7.5. Find AB I could not draw the diagram :(
  10. richman92

    Period of Satellietes

    use the Kepler's equation to calculate the period
  11. richman92

    HSC Vietnamese

    i am looking for a topic for speaking exam. Any idea ? I'm dying :( half yearly is coming
  12. richman92

    what is your school up to in 4u

    complex no graphs and just start conics Is it slow ??
  13. richman92

    Physics Assignment

    man, everything is in jac phy book. Open the book and check. They got this prac
  14. richman92

    outline the essential problem with light, the aether and the principle of relativity.

    Re: outline the essential problem with light, the aether and the principle of relativ if the aether existed then light made from different objects traveling in different directions in the aether would have different velocites relate to the aether, as a result, the observer could measure and...
  15. richman92

    learning to play the piano

    Thanks for advice I'll try my best :)
  16. richman92

    learning to play the piano

    I'm now 17 and i want to learn play piano. This is possible ?? cause I don't know any basic. btw do u know any piano tutor ??
  17. richman92

    Post Your Current Ranks/Marks

    ESL - 20/20 - 1 MATH2 - 46/47 - 1 MATH3 - 39/40 - 1 MATH4 - 32/40 - 2. The guy who ranks first got 33/40 lol. I got some stupid mistakes
  18. richman92

    Profile + Current Research of an Australian Chemist

    They only got some general stuff but not in details Btw, I actually found one. U can check this guy http://en.wikipedia.org/wiki/Robert_Gilbert_(chemist) Have fun :)) Just finished my assessment task on ANSTO
  19. richman92

    Profile + Current Research of an Australian Chemist

    I need profile + current research of a Australian chemist Thanks a lot
  20. richman92

    Physics HSC Questions Sorted by Topic

    re: Physics HSC Questions sorted topic-by-topic This is really useful, bro Thanks a lot :)
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