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I know this is a bit late lol, but can someone help me with question 8 b) (v) in the 2004 HSC exam ? here's the link http://www.boardofstudies.nsw.edu.au/hsc_exams/hsc2004exams/pdf_doc/maths_ext2_04.pdf Thanks

School rank ~20 English Adv - 38/124 Maths Ex1 - =2/91 Maths Ex2 - 8/40 Physics - =11/64 Chem - =6/72 Thanks :)

This is Q7 Excercise 25(c) from 3u Fitzpatrick $Solve the differential equation $ \frac{d^2x}{dt^2}+16x=0 $ subject to the conditions $ x=3 $ and $ \frac{dx}{dt}=16 $ when $ t=0. $ Find the maximum displacement and maximum speed if x metres is the displacement of a particle moving in a straight...

^ just wondering

Hey guise, just wondering what ranks I would need for a 99+ atar i go to school ranked around 20 subjects and approx. number of ppl doing them: 4u Maths (40) Chemistry (75) Physics (65) Eng Adv (120) btw English is my weak point and i know about 20 ppl get band 6 for chem/ phys each year and...

I need help with part ii) Its from the 2005 HSC

So, apparently Sodium bicarb solution has a pH of >7 in solution, so that must mean the HCO3- ion must accept a proton from water becoming carbonic acid and producing OH-. However im just wondering, what is stopping the HCO3- from donating a proton to water, producing H3O+, causing the solution...

\text {Using De Moivre's Theorem, show that }\tan3\theta =\frac{3\tan\theta-\tan^3\theta}{1-3\tan^2\theta}

Hey so for calculation questions, does it matter how many significant figures or decimal points you round off to? I know in Chem u round ur final answer to the lowest number of sig figs given in the question so is it the same for physics?

I don't understand how einsteins special relativity opposes / provides evidence against the aether model

So i've been thinking, would it be a good idea to start doing individual HSC questions from topics we've covered already? Like for example in Physics our school just finished space, so should I look through past HSC papers and just do the space questions? or should I just not touch the papers so...

a) Write down, or derive, an expression for cos3x in terms of cosx b) Explain why, if x = 18, then sin2x = cos3x c) prove that sin18 = (sqrt(5) - 1)/4 I got part a and b but how to do c :confused2:

is it a good idea to use rhetorical questions in a speech? why/ why not? because apparently a teacher said its not a good idea unless they're really good