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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...

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 =...

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...

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

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.

Mary Shelly's Frankenstein film version 1994 is wonderful, really impressive.

I join your club. :(

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.

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

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.

No way. You are just considerably intelligent.

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

School's school. It'll be fine.

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

Oh, okay. Wow. Didn't know that. :)

How'd you go in the HSC? Marks? UAI?

Chemistry's paper consumption is wiping out Tasmania's forests.

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...

All formulae as a word document. Haha. I have a brain.

The rest of it. :)