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How does one solve this?

Ive gotten a perpendicular vector to the one in the question 2i + 5j, how do i morph this into the required magnitude of 12? (Do i have to convert it to unit vector maybe?)

Hey around about now is when trial papers come out. I was just wondering if anyone has some 2021 chemistry papers that they'd be willing to share? Thanks !

Need help rearranging this with respect to the rates of change.

Should the rowing one simply be 8C5 ? And the other question, B?

Hey everyone, Which papers are the most reflective of the HSC in terms of chemistry, and economics. (And any other subjects too) Thanksssss

Hey everyone, I was thinking of doing extension 2 and was reading up on it. Many people say that it's difficult to finish the exam, so I wondered, for those who get like a 94, how many questions they'd "leave". (obviously, they wouldn't leave anything per se, but by that, I mean attempt with...

Could someone please explain how these are solved? Thank youuuuu!

Hey everyone, my trials are a couple of weeks time and I'm super nervous about my chem and ecos :( I was wondering when it's possible for those schools who are doing theirs next week to post their trial papers to help prepare for the HSC? (Also, are my accelerated marks competing with the set...

Thanks!

Just wondering when schools are having their trial exams? (Feel free to drop your school's dates below). I'm very nervous for my ecos and chem. :( Also, I read on here that CSSA has moved their papers to later in the term, dis true?

Hey does anyone have a compilation of HSC chemistry notes that they wouldn't mind sharing? (that aren't the ones already posted to bos) It'd be super appreciated. :)

Hey, I know this is probably over asked but I was wondering what would happen in my case. Let's say the marks sent by my school was 91 for me, the person 1 rank above, gets a mark sent by the school of 95. What would happen if everything else stays the same, except, she and I swap our HSC...

Hey everyone, Ive got a chem practical worth 70 marks on Wednesday. Its on modules 6/7 and is split into 3 sections, 2 of them worth 25 marks and are practical parts, and the last one is worth 20 marks, which is analysing secondary data. How should I go about preparing for this? Thanks

Thanks

What time split is recommended to get a mid B6 in Chemistry and Ecos, in terms of how many minutes I should spend on M/C, S/A and extended responses (for Ecos obviously). Thank you

As per the title, I was wondering what types of practicals can be asked from modules 7 and 8 for Chemistry? As in, what is generally assessed, and how should people prepare for these? Thank you !

I was wondering how to improve my writing speed, because I have an essay due today in 3 weeks time, and my teacher recommended that I write approximately 1250 words to have a solid shot at 18-19. Although its not necessary, more words allow you to express more, or at least buys you more thinking...

I was just looking around on the webside, and I just dont really understand why alignment occurs. They do moderation and scaling, isnt that enough? And it seems like for most subjects, regardless of the mark, the claimed raw mark to aligned mark always shoots up, like ALWAYS. How would that even...

Just wondering how much 2U content gets assessed in the 3U trials and HSC? Thanks