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  1. bored of sc

    Peter Skrzynecki

    He's coming to our school. Win.
  2. bored of sc

    What's everyone thinking/planning to do in the "big" holidays after the hsc?

    Chill out and get red P's if I haven't already by then.
  3. bored of sc

    maxima / minima

    17) The volume of a cylinder is V = pi*r2*h Now we are told the volume is 400cm3 So V = pi*r2h = 400cm3 Now make h the subject pi*r2h = 400 h = 400/(pi*r2) Surface area of a cylinder is A = 2*pi*r(r+h) So sub in h as the above expression. A = 2*pi*r(r+400/(pi*r2) = 2pi*r2+800/r...
  4. bored of sc

    maxima / minima

    a) 2x+2y = 30, letting the length be x and width be y. y = (30-2x)/2 = 15-x Area of rectangle = length*width = xy = x(15-x) = 15x-x2 A = 15x-x2 dA/dx = 15-2x dA/dx = 0 for stationary points 15-2x = 0 x = 7.5 d2A/dx2 = -2 < 0 thus negative concavity so maximum turning point =...
  5. bored of sc

    maxima / minima

    15. Let the radius of the semi-cirlce be x and the length of rectangle be y. Perimeter = pi*2x/2 (semi-circle, circumference = pi*diameter = pi*2x) + 2y (lengths of rectangle) + 2x (other side of rectangle which happens to be the diameter of the circle) So P = pi*x + 2y + 2x = 4m (given to...
  6. bored of sc

    so confused?????

    Bookmark this site too. This becomes your bible for HSC subject information, syllabuses, past exam papers etc. Home - Board of Studies NSW
  7. bored of sc

    Help!! Chemical properties of radioisotope.

    The board of studies use "chemical properties" in this context to mean half life, type of radiation emitted etc. It is used incorrectly though since chemical properties actually means the ways in which atoms interact via electron transfer, sharing etc rather than the way the 'nucleus' changes.
  8. bored of sc

    Thoughts on Frankenstein/Bladerunner

    Mary Shelly's Frankenstein film version 1994 is wonderful, really impressive.
  9. bored of sc

    School tomorrow!

    I join your club. :(
  10. bored of sc

    Help plz fuel cell chemistry assignment due 2morw plzzz

    I only had a quick skim and don't know much about this topic but I'd say it all looks good to me. :) Don't take my word for it though.
  11. bored of sc

    The AND and OR of probability

    I haven't done probability yet but I suggest using the principle AND = multiply, OR = add.
  12. bored of sc

    The Butterfly Effect

    Thank you. I will consider having this one up my sleeve if need be. :) The trouble is I am already doing Summer Heights High so I would be doubling up the visual/film medium.
  13. bored of sc

    Starting 3 Unit Maths this Year? Like to find some friends to study with? Post Up

    No way. You are just considerably intelligent.
  14. bored of sc

    everyones studying? ahh

    Not everyone's studying. It's just 90% of the people of here study.
  15. bored of sc

    School tomorrow!

    School's school. It'll be fine.
  16. bored of sc

    The HSC: An Environmental Hazard?

    There are fine results. Now back to thread topic. Wow, 20kg paper for history/english, wow!
  17. bored of sc

    Hsc Marathon 2009 - Chemistry

    Oh, okay. Wow. Didn't know that. :)
  18. bored of sc

    The HSC: An Environmental Hazard?

    How'd you go in the HSC? Marks? UAI?
  19. bored of sc

    The HSC: An Environmental Hazard?

    Chemistry's paper consumption is wiping out Tasmania's forests.
  20. bored of sc

    What would you guys give this story out of 15?

    As I continue to embrace the thought of the girl's beautiful trumpet tune and fall off to sleep many people go outside for a night on the town. I call them ghosts awakening from hibernation i.e. their daytime slumber/work etc. That make sense? Basically a fancy way of saying that people go...
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