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Hey guys, I was wondering, how long on average are your business reports and essays (under exam conditions, like how many exam booklets do you write). I'm having a bit of trouble working out how much is too much and how much is too superficial for a report and essay, and yes I know it's...

Twas wondering, does anyone know any places to get good trial papers (not past HSC exams, but past trial papers - like for example CSSA). Any help would be most appreciated. Thanks =)

Hey guys, Just need a bit of help with part of a question from Jacaranda. 8. (a) Using the data from table 18.2, calculate the acoustic impedance of: (i) soft tissue (ii) bone of density 1600 kg m−3. (b) Calculate the ratio of the amplitudes of reflected and transmitted ultrasound traveling...

Hey guys, I have this simple Ideas to Implementation question, but I can't seem to get the correct answer. A red laser emitting 600nm wavelength light and a blue laser emitting 450 nm light emit the same power. Compare the rate of emitting electrons. Thanks guys.

Hey guys, I was wondering if anyone else here made it to the third part of the application (the online competency test). Cause I'm not sure if they've selected anyone, or if everyone gets to sit the test.

Hello guys, I was wondering if someone could proof read my work for me. The answer is b^2, however I keep on getting a -b^2, and I cannot see where I've made my error. The question states: <meta http-equiv="Content-Type" content="text/html; charset=utf-8"><meta name="ProgId"...

Hello guys, I was wondering if anyone could help me with this question. I don't know how to get it in terms of one angle. P(acosθ, bsinθ) and Q (acosα, bsinα) lie on the ellipse x^2/a^2 + y^2/b^2 = 1. Find the eqn of the chord PQ. Hence show that if PQ subtends a right angle at the point A(a,0)...

Hello guys, I'm having trouble with this projectile motion question, wondering if you guys can help me (it's such a bitch). A particle is projected upwards at an angle A with a speed V relative to the firing platform which is stationary and inclined at 30 degrees to the horizontal. The...

Hey guys, Got this question from a worksheet, I cant seem to think of what to do. UV Rays of frequency 8.4 x 10^15 Hz strike a zinc plate ejecting electrons. If all the energy of each photon goes into accelerating one electron, what will the velocity of the electron be? Thanks in advance...

Hey guys, I was doing some past papers and I came about this question and got stuck. I was wondering if you could help me with this question. After the sun, the nearest visible star visible to the naked eye is Rigel Centaurus which is 4.35 light years away. If a spacecraft was sent...

Hey guys, Wondering if anyone could help me with this question: The equation x^3 + 3px^2 + 3qx + r = 0, where p^2 cannot = q has a double root. Show that (pq-r)^2 = 4(p^2-q)(q^2-pr). I've tried finding P'(x) and letting it = 0, but i don't know where to go from there. Thanks guys, in advance.

Hey guys, I was going through my school's past papers and I found this question. It makes sense to me, but I don't know how to explain it properly to get the 5-marks. I can get the sketch, but I was wondering if you guys could help me explain it. Question (5 marks): Rolle's Theorem states...

Hey guys, Just a volumes question - I'd appreciate it if you guys could help me (I can't get volumes into my head: 3. The base of a solid is a circle x^2 + y^2 = a^2. Each section of the solid by a plane perpendicular to the x-axis is a square. Find the volume of the solid. Also find the...

This may probably seem like a dead easy question for most people, but I can't seem to get it. Find the area of the region bounded by the curve 3x/(x^-1), the x-axis and the line x = 1/2. This is what I've done so far: Let u = x^2 - 1 du = 2x dx du/2= x dx also changing the...

Hey guys! After all the threads about units and subject selections - it got me thinking about my subject selections. I was wondering - should I do 11 units or should I do 13? I currently have 13 units (in my signature) and I was thinking of dropping Software Design & Development - mainly...

Hi guys, I think this is the first time I've actually posted for help with a maths problem - but I can't seem to see this question - stupid vectors (and they're probably easy to most people) Anyway, 1. Prove that three points z1, z2 and z3 are collinear if only the ratio (z3 - z1) / (z2...

Hey Guys! I’m currently doing my Area of Study in English (yeah we’re weird and we do AoS last) and my Area of Study is on Relationships. I need a few supplementary texts for an upcoming assessment and I’m running low on ideas. I have a film and a play already; however I was hoping to get a...

Thought I'd make a thread of my own. Holidays coming up! What are you guys planning to do? Study, bludge? We get a 3 week holiday (thatnks to WYD!) and I'm planning to go out on the first week and start studying for my HSC Maths Trials in the other 2 weeks.

Hey Guys! I was wondering if anyone on BOS moved to a Selective High School for Year 12 (applying whilst you're in Yr 11). If so, maybe you could share your thoughts on how it was like adjusting, was it better than your old school and is it really worth it for the three terms or so? Also I was...

Hey guys, just a simple question... When sketching sin i/sin r which value goes on the x-axis (horizontal). because some say sin i and some ppl say sin r. Thanks guys.