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  1. Constip8edSkunk

    Comsoc Camp / Cruise

    Are you gonna go to the commerce camp, or cruise, maybe both or neither?
  2. Constip8edSkunk

    exponential function

    I am having a bit of a mind block here and need some help. I think this is covered in 4U: given that (1 + 1/k)^k < e < (1 + k)^k+1 for k E Z+ , show that (1 + n)^n / e^n < n! < (1 + n)^(1+n) / e^n where n E Z+
  3. Constip8edSkunk

    Definitions

    What does it mean when a function is described as a)injective and b)subjective?
  4. Constip8edSkunk

    SMH article

    http://www.smh.com.au/articles/2003/11/04/1067708212432.html so the Unis finally caught on to the stupidity of the HSC course :rolleyes: can the standards get any lower? HAHAHAHAHAHA...
  5. Constip8edSkunk

    Solenoid Q

    What was the question? Did the question say the coils were originally moving in pendulum motion or were they stationary... think i might have misread the q..... :(
  6. Constip8edSkunk

    Conservation Laws and Chadwick

    the dot point says discuss its importance, but im not sure how you can discuss it, i mean i can think of adv: its important; disadv: none.. hmmm lol also i was reading the explaination in Longman's Physics Contexts... and i didn't get it at all... Here's what i thought it should be: [let...
  7. Constip8edSkunk

    Prac: Modelling Semiconductors

    I just realised this point today.. how would you model the behaviur of a semiconductor with reference to conduction via holes and electrons? I'm not sure what they mean by "model"... would just drawing the atomic lattice structure with -/+ 1 electron be good enough? and what do u do...
  8. Constip8edSkunk

    Reverse Osmosis and Microscopic Membranes

    How would you evaluate the process of purification of water by Reverse Osmosis and Microscopic Membranes in comparison with the conventional flocculation-sedimentation-filtration-chlori/fluoridation process? so far all i got is that the traditional way is cheaper and the reverse osmosis is...
  9. Constip8edSkunk

    Shipwrecks and Salvage

    Another shipwrecks question that neither the textbooks nor the adviceline (will any of them actually start answering the questions rather than dictating the book...) helped... In the process of electrolyric restoration of iron, it is said that the majority of rusted products, such as...
  10. Constip8edSkunk

    Ship Wrecks Question

    A bit confused bout this aspect of corrosion of iron/steel Macmillan explains corrosion of ships' hull by differential aeration as the set up of a galvanic cell where the anode is the site of least concentration and cathodic site as those with maximum oxygen concentration Earlier, it...
  11. Constip8edSkunk

    Ordinates

    what are they? i thought they are the y co-ordinates of a point but what do they mean when they say the ordinate of P intersect the asymptote at N or something like that. This is from the blue patel 4U text book.
  12. Constip8edSkunk

    Shipwrecks - Surface Alloys

    Ok, Chromium is unsuitable for protection against corrosion on ships as its passivating oxide layer will be continuously broken down by the chloride ions in the salt water. this is one of the reasons that stainless steel is also unsuitable. But why Surface alloys produced using laser-induced...
  13. Constip8edSkunk

    Eng Adv Mark

    Can some one estimate the approxite mark required in English Advanced to get 99+ UAI if say the marks for phys and chem would b low band 6, maths ext1/2 mid band 6 and english ext1 low E4 to borderliine please? thanx.
  14. Constip8edSkunk

    NRL Tipping Round 21

    Yeah...just to keep this going ... but too lazy to add up the results from previous rounds. Home teams first: ROUND 21 Friday Roosters vs Raiders Saturday Warriors vs Storm Eels vs Tigers Sharks vs Broncos Sunday Souths vs Bulldogs Dragons vs...
  15. Constip8edSkunk

    Australian Maths Comp

    How did you guys go? Anyone confident of getting a cheque or a medal? :D
  16. Constip8edSkunk

    Electron Bands Theory

    This isnt in the syllabus, but out of interest: In some notes from those hsc enrichment things, the Fermi Level is described as being the top of energy levels at absolute 0 temperature. But in insulators and semiconductors they prostioned in the energy gap between the conducting and valence...
  17. Constip8edSkunk

    trig question

    are these methods correct? lim<sub>x-->0</sub> (cosec x - cot x) 1/ = lim<sub>x-->0</sub> [(x/x) (1/sinx - 1/tanx)] = lim<sub>x-->0</sub> [(1/x) (x / tanx - x / sinx)] = lim<sub>x-->0</sub> (x / tanx - x / sinx) * lim<sub>x-->0</sub> (1/x) = (1-1) * lim<sub>x-->0</sub> (1/x) =0...
  18. Constip8edSkunk

    Another question i cant do :(

    something from a past 3U assessment: A curve has parametric eqations of x=at-sint and y=a-acost} (for 0<t<cost) Prove dy/dx =cot(t/2) and d<sup>2</sup>y/dx<sup>2</sup> = -1/(4x) cosec<sup>2</sup>(t/2) Hence show that y regarded as a function of x has a stationary point where t = pi and...
  19. Constip8edSkunk

    Polynomials Q

    need help plz for just 1 more question in my last minute scramble for 4U assessment 2moro.. Prove that if the equation (x-b)(x-c)+(x-c)(x-a)+(x-a)(x-b)=0 has a double root, then a=b=c. (note that a, b, c are real numbers) thanx
  20. Constip8edSkunk

    Implicit Differentiation

    need some help with this problem: ok both are correct following their methods, and graphing it gets u a circle where pts where vertical tangents can be produced are (-1.5,1.5) and (1.5,1.5) and hor. tgn. at (0,0) and (0,3) which fits in wif both eqn cept in the original eqn y=/=0 (or...
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