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The liquid in a vessel is allowed to flow out through a tap in the bottom at a rate given by dV/dt = -10(40 - t) where V cm^3 is the volume of liquid in the vessel at time t seconds. Initially the vessel contained 8.0 liters of liquid. Find the amount of liquid in the vessel after 10 seconds...

I'm starting Year 12 soon and I have a need to get ahead in Physics. My teacher tends to skip around all over the syllabus and misses out on a lot of stuff that's in there. As I've had him in Year 11 I noticed that we didn't particularly learn everything that was in the syllabus and I'm afraid...

Solve the equation 6x^4 - 29x^3 + 40x^2 - 7x - 12 = 0, the product of two of the roots being 2. answer: 4/3, 3/2, 1 + √2 Solve the equation 8x^4 - 2x^3 - 27x^2 + 6x + 9 = 0, given that the sum of two of its roots is zero answer: + √3, 3/4, -0.5 Source: Questions 17 & 20 of Chapter 27 3U...

Ÿ Explain why momentum is conserved in collisions in terms of Newton’s Third Law of motion No idea why ... my physics teacher never explained ... Help? Thanks!

The Dilemma: I don't know if I should drop Japanese. Expected 2009 subjects: MX1, MX2, English Ad, Economics, Physics and maybe Japanese Continuers. Reasons for: I have a love-hate relationship with it It takes up too much time to study I'm not good with memorising languages I can read and...

Hi, I'm asking this as a favour for my friend: Her problem is that she is doing really well in EX1 (1st/6) and she doesn't know whether she should keep it or drop it. She is doing fairly well in her other subjects, but she does not want to have the burden of 13 units in Year 12 (as she is doing...

1. A basketball team of 2 men and 3 women is to be chosen at random from a group of 5 male and 7 female players. If George and his girlfriend both try out of the team, find the probability that neither will be chosen in the team. Answer: 12/35 My working out: 4C1 x 6C2 = 60 5C2 x 7C3 =350...

Has anyone seen that show? It airs on Wednesdays 7:30-8:30 and it's about psychics. It's in it's 2nd week running so far. I thought the show was really good and kinda freaky at the same time :rolleyes:

I really don't know what they mean when they ask, 'To what extent'. Can someone clear this up for me?

Hey, I got stuck in a question 3 months back and I asked my teacher about it. Back then, I understood it and now when I look back at it, I don't know what he did, so can someone please explain to me what he did? I don't know where he got the 4^k and +92 from ... It's on about the 12th Line down...

There are just some things that I don't get: 1. Find the exact value of 2cos105° sin105° answer: -1/2 2. Show that sin²7Θ - sin²4Θ = sin11Θsin3Θ In the answers for this, I understood everything up until the bolded bit: RHS: = sin11Θsin3Θ = sin(7Θ+4Θ)sin(7Θ-4Θ) = sin²7Θ - sin²4Θ -...

I recently bought the book and it didn't come with the cassette! Where do I go to reclaim it? I mean, it's suppose to be included with the price on the textbook, right?

Hi, I've been considering to apply for a prefect for Year 12, but I'm not too sure if I should. I've heard that you miss out heaps on classes and I really don't want to fall behind on school work or miss out on English lessons. But I also want to be a prefect because, well, I haven't really...

I don't understand how to sketch this graph. I read over Maths In Focus's teaching, but I still don't get it. Help? y = (x + 2) / (x^2 - 4)

I don't know which one I should drop. I'm definitley going to drop Ext. English next year, but I'm not too sure which one of the two I should drop to get me down to 10 units. I think my parents want me to do 10 units for the HSC, but I don't mind doing 12. What's it like doing 12 Units for the...

My teacher said that it wil be in my half yearlys, but I have absolutely no idea what it is! We haven't even learnt it yet but it's going to be in there... help?

Help? I have no idea how to do one of these questions! The product of two of the roots of x^4 + 2x^3 - 18x - 5 = 0 is -5. Find the product of the other two roots. Thanks in advance!

I really don't understand how the Government in a market economy solves the economic problem. I know that they use the 4 questions to solve it, but it still doesn't make sense to me! Does PPF/C have anything to do with this process as well? I'm so lost =( Help? Thanks!

Hi Guys! Well, my teacher the other day put forward a question to ask the class and he got me thinking about it for a while, so here's the question: "What are the limitations to Lasers?" I tried searching for the answers on the internet, but I haven't found anything solid yet. I'd appreciate...

I have this huge exam on it, and well, my teacher isn't exactly the best note giver in the world, so does anyone have an spare notes lying around? Please, and thanks =)