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Thank you for that.. But my teacher suggested doing it on Cellulose. I'm just stuck on the bit on WHY we need to use a biopolymer. Obviously it's because fossil fuels are a non renewable resource, but I don't know what makes Cellulose so good..

Hi, I have a question for an assignment and am kind of stuck, what things could I discuss? "Biopolymers have been suggested as an alternative to polymers based on fossil fuels. Evaluate the use, or potential use of a named recent biopolymer related to its properties and manufacture." (6...

I concur! My old Physics teacher is a REALLY GOOD teacher. He also has been a senior HSC marker, he said he used to check one in five papers to make sure they've been marked correctly. He also said that he drew a smiley face on a card and when asked for ID by security, he showed him that card...

Any teacher can become a HSC marker, so I don't think there's that much honour in becoming one. Don't get me wrong, I know some fine teachers who are HSC markers, but I do know a few English ones who boast and carry on about their appointment of being a HSC marker, but they can't teach! Also...

Hi, Can anyone please give me the reactions for the production of LDPE and HDPE? Thanks, Jason

Can someone tell me about the DET portal? I've obviously never used it, but I am curious on what led upto having it created and the differences between the old and this new system?

Oh btw, you probably wont get a question like this in the actual HSC, as it's considered to be too hard (because it involves both full flight and half flight projectile motion). But still it's good practise. Regards, Jason

tup=(usinθ)g =(80*sin30)/9.8 =4.08s h=(u2sin2θ)/2g =(802sin230)/(2*9.8) =81.63m Therefore height above sea level = 181.63m ie when Vy=0 Therefore ux=69.28ms-1 Δy=uyt+(1/2)ayt2 181.63=(0)t+(1/2)*9.8*t2 t=6.09 Δx1=uxt =69.28*6.09 =421.92m Δx2=69.28*4.08 =282.66 Therefore projectile lands...

Yes I did try expanding and got everything messed up. What are some ways to efficently expand stuff like this? Thanks, Jason

Hi, Here's the question... If p=a+b, q=aω+bω2, r=aω2+bω Prove that: p3+q3+r3=3(a+b) Thanks, Jason

Geez that was simple o.O... Thank you!!

Hi, Here's the question, I have no idea on how to do it. If 1, ω, ω2 are the 3 cube roots of unity, prove that (a+bω+cω2)/(b+cω+aω2)= ω Thanks, Jason

Thanks alot, much appreciated! This rule is the same for sin? Thanks, Jason

Thanks alot for that, I think it is that method, without finding the actual roots. But I have one more question, Hope you don't mind answering please: Wouldn't cos be negative as it'd be in the 2nd quadrant if you add 2π? Thanks, Jason

Hi Trebla, Thanks for your help. I have a few questions though, in the book (Coroneos) it says in the examples to not find the actual roots (unless specifically requested) but use the results of 1+ω+ω2=0 and ω3=1 (I think...) So...? Also I don't get this bit below. Could you explain how cis...

Even Biology?

Hi all, I have a question, I'm mainly interested in the setting out of this question, so please do post full working. "If ω is a complex cube root of unity, show that the other complex cube root is ω2 and prove that 1+ω+ω2=0 Show that a) (1-3ω+ω2)(1+ω-8ω2)=36 b) (7+9ω4+7ω-1)6=64 Thanks, Jason

Hi, Are there any books that have HSC style questions of Reading and Responding and Listening and Responding? I've tried searching this forum but couldn't find anything. Thanks, Jason

I'm not saying that at all. But assuming that the OP doesn't live in a rural area, he/she would have some sort of access to broadband, which could range from Cable internet to even Wireless (iBurst/Unwired).

Why do you have dialup anyway? Lemme remind you that it's 2008, and that there are technologies out there that are like 32 times faster than dial up which are available every, maybe except for the rural areas.