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Guys, what do you think a 90 raw in this exam will scale to? I looked at the rawmarks.info page for physics. The table shows that a 90 in 2013 got scales to 95 but a 90 in the same year also got scaled to 94. How is this possible?

Guys, for the last question with that binomial proof, would I lose a mark for leaving my answer with [nC0 instead of nCn], [(n+1)C1 instead of (n+1)Cn], [(n+2)C2 instead of (n+2)Cn] ... etc? I forgot to justify with mirror property. RIP

I think because this exam was much easier than 2013/2012 94/95 would be more accurate for an 87 raw. Apparently half of James Ruse only lost two marks? Is this true or just a rumour?

What do you guys think an 87 raw would scale to?

One disadvantage of Strontium-90 is that it has chemical properties similar to calcium and so can replace calcium in bone, leading to bone cancer and leukemia. Disadvantages you can use for any radioisotope include the high costs to operate nuclear reactors / particle accelerators incurring...

Hey guys. For the question asking to discuss properties of a non-medical radioisotope related to its properties, I did not include any disadvantages. However, I did explain the advantages of 3 properties of Cobalt-60 related to its use in industrial radiography and gave a thorough explanation of...

"In chemistry, an oligomer is a molecular complex that consists of a few monomer units, in contrast to a polymer, where the number of monomers is, in principle, not limited." Wikipedia may not be a fully reliable site, but I dont think B would qualify as a polymer if it a dimer...

Hey guys. Would I lose marks for explaining the thermal decomposition of sodium hydrogen carbonate before ammonia recovery for part (i) of the Solvay Process question with the given flow chart?

Hey, guys. If anyone can give an accurate estimate for my ATAR, it is very much appreciated. Following are my ranks for the subjects I'm doing Physics: 4/75 Mathematics Extension 1: 2/125 Mathematics Extension 2: 5/47 Chemistry: 1/107 English (Advanced): 30/131 School Ranking: 24...

School Rank is around 24 Maths X1: 5/130? Maths X2: 1/60 (I was equal first with 2 other people) Chem: 1/120 Phys: 5/90 English Advanced: 35/130 Thank you!