## Search found 39 matches

- Wed Dec 08, 2010 7:16 pm UTC
- Forum: School
- Topic: Cambridge NatSci Interview
- Replies:
**17** - Views:
**2427**

### Re: Cambridge NatSci Interview

Well guys, thanks for the tips. I had the interviews today. Nothing too major, apart from being asked biological and chemistry questions when I was applying for Physical Natural Sciences. Ah well, I still dealt with it well. Now just to spend the Christmas holidays wondering what's going to happen.

- Mon Nov 29, 2010 4:16 pm UTC
- Forum: School
- Topic: Cambridge NatSci Interview
- Replies:
**17** - Views:
**2427**

### Re: Cambridge NatSci Interview

I liked Downing, and it had specially equipped rooms for deaf people, so I applied there. Emmanuel was very nice, but IIRC they didn't have any rooms for deaf people. A shame though, as I liked Emmanuel a lot. Just out of curiosity, please ignore/correct me if this is rude: What does a specially-eq...

- Mon Nov 29, 2010 12:08 pm UTC
- Forum: School
- Topic: Cambridge NatSci Interview
- Replies:
**17** - Views:
**2427**

### Re: Cambridge NatSci Interview

I liked Downing, and it had specially equipped rooms for deaf people, so I applied there. Emmanuel was very nice, but IIRC they didn't have any rooms for deaf people. A shame though, as I liked Emmanuel a lot.

- Wed Nov 24, 2010 10:04 pm UTC
- Forum: School
- Topic: Cambridge NatSci Interview
- Replies:
**17** - Views:
**2427**

### Re: Cambridge NatSci Interview

I'm predicted 4As, with Physics and Geography being a possible A* if I worked hard enough. I had a good run of GCSEs, with the majority being A*s with a few being As. In that case, Earth Sciences looks to be a more viable option. I may decide to do both Material Science and Earth Sciences, but I'm n...

- Wed Nov 24, 2010 9:08 pm UTC
- Forum: School
- Topic: Cambridge NatSci Interview
- Replies:
**17** - Views:
**2427**

### Re: Cambridge NatSci Interview

I'm doing 4 A-levels - Maths, Physics, Geography and Further Maths. I'm planning to take Physics, Maths and Computer Science, with the last module being undecided since I would like to do Earth Sciences but apparently that requires A-level Chemistry. I'll probably gravitate towards Material Sciences...

- Wed Nov 24, 2010 5:21 pm UTC
- Forum: School
- Topic: Cambridge NatSci Interview
- Replies:
**17** - Views:
**2427**

### Cambridge NatSci Interview

I just received a letter from Cambridge (Downing College, specifically) that they want me to come to Cambridge for a NatSci interview. I'm pretty pleased that I've been actually considered, but I've got to prepare for the interview. So, is there anybody from Cambridge who can give me some idea of wh...

- Sat Oct 09, 2010 4:33 pm UTC
- Forum: Gaming
- Topic: gog.com "Good Old Games"
- Replies:
**72** - Views:
**10762**

### Re: gog.com "Good Old Games"

Just bought Arcanum. Now I remember why I never played it all that much. I'm stuck already - go me. Just outside of Shrouded Hills is a bridge to Tarant, but there's Luke the Witless with two henchmen. As far as I'm aware, there are two ways to get through: Kill them or destroy the bridge ma...

- Wed Sep 29, 2010 6:51 pm UTC
- Forum: Science
- Topic: Plate tectonics + Convection currents
- Replies:
**14** - Views:
**3095**

### Plate tectonics + Convection currents

Today, in Geography, I was talking to my teacher about how we could prevent or slow down the rate at which the plates move. We discussed some methods such as nuclear explosions underground or lubricating the plate margins (These were in the textbook by AQA, I don't even know why they're there. To sh...

- Fri Sep 24, 2010 7:32 pm UTC
- Forum: School
- Topic: Physics Personal Statement
- Replies:
**12** - Views:
**3568**

### Re: Physics Personal Statement

I don't have much to add, but I was talking to my Geography teacher today about this very subject - and he mentioned that a tactic that worked for him and his friends was to first get in contact with all the universities that he was looking at about the courses, either through phone calls, or Open D...

- Sat May 01, 2010 6:25 am UTC
- Forum: Mathematics
- Topic: Mechanics 2 problems - Work, Energy and Power
- Replies:
**6** - Views:
**1053**

### Re: Mechanics 2 problems - Work, Energy and Power

Think of a right-angle triangle with 200m hypotenuse, and the horizontal and vertical components as the other two sides. You've already been given the angle of the triangle, delta h is just the vertical component. Ah, gotcha. I did that, and got the vertical component to be sin^-1(1/10) x 200 (Sinc...

- Sat May 01, 2010 5:27 am UTC
- Forum: Mathematics
- Topic: Mechanics 2 problems - Work, Energy and Power
- Replies:
**6** - Views:
**1053**

### Re: Mechanics 2 problems - Work, Energy and Power

I figured I'd try 1/2mv^2, ... For A: I got - 0.5 x 760 x 10 = 3800J For B: I got - 0.5 x 760 x 25 = 9500J You seem to be dropping a ^2. Beyond that, finding the triangle for the potential energy should be pretty easy. The hypotenuse of your triangle is 200m, and you know one angle sin^-1 (1/10), s...

- Sat May 01, 2010 5:00 am UTC
- Forum: Mathematics
- Topic: Mechanics 2 problems - Work, Energy and Power
- Replies:
**6** - Views:
**1053**

### Mechanics 2 problems - Work, Energy and Power

Normally I wouldn't post for help on here, but I'm completely stuck because my teacher thought it would be a good idea to do the whole chapter in 30 minutes and then assign us the end of chapter questions. I've managed to do 1, and 2, but I'm feeling lost on both 3 and 4. 3. A car of mass 760kg is t...

- Thu Feb 11, 2010 10:42 pm UTC
- Forum: School
- Topic: Applying for Head Boy position
- Replies:
**3** - Views:
**940**

### Applying for Head Boy position

Every year, my school accepts applications for the Prefects positions or the Head Boy position. We have to write a letter of application and give a 3 minute speech to the staff. I was wondering if anyone here could give me some tips about what to include in my letter of application or my speech.

- Tue Feb 09, 2010 10:27 pm UTC
- Forum: Mathematics
- Topic: Extra-curricular Maths
- Replies:
**10** - Views:
**1386**

### Re: Extra-curricular Maths

As far as I'm aware, there is only one contest here - the UKMC. It's only available for Year 9 to Year 11. I'm in Year 12.

- Tue Feb 09, 2010 9:48 pm UTC
- Forum: Mathematics
- Topic: Extra-curricular Maths
- Replies:
**10** - Views:
**1386**

### Extra-curricular Maths

I'm already taking Maths and Further Maths at school, but if I want to go to a good university to study Maths, then I'll need to do some extra-curricular activities to prove to the universities that I really am interested in Maths. I thought I'd start off by learning some Maths that wasn't on the sy...

- Tue Jan 19, 2010 8:09 pm UTC
- Forum: Mathematics
- Topic: Question on formulae for series
- Replies:
**4** - Views:
**615**

### Question on formulae for series

In F.Maths today, I was learning about series, and the general equations for finding specific things. For example, (Not sure how to write this in LaTex, sorry!) \sum_{r=1}^{n}r^2 = \frac{n(n+1)(2n+1)}{6} \sum_{r=1}^{n}r^3 = \frac{n^2(n+1)^2}{4} (Thanks to Xutar) Now, I can ge...

- Thu Jan 14, 2010 10:09 pm UTC
- Forum: School
- Topic: Awesome Student Quotes
- Replies:
**870** - Views:
**225104**

### Re: Awesome Student Quotes

We were having an AS Physics lesson in which we were quickly going over the basics of electricity. The teacher was talking about I =\frac{V}{R} and how raising V made the current bigger, while raising R made the current smaller, etc. After a while, he, for some reason, pointed out that R was a "...

- Thu Jan 07, 2010 8:29 pm UTC
- Forum: Mathematics
- Topic: Math Books
- Replies:
**379** - Views:
**283065**

### Re: Math Books

I've noticed that my collection of books is sorely lacking in books related to Maths, and I've always been interested in the history, and practical applications of Maths. I don't suppose anyone here has recommendations for the history of Maths, or even practical applications? I realise that this is ...

- Sun Dec 13, 2009 8:11 pm UTC
- Forum: Mathematics
- Topic: Matrices and how they transform graphs
- Replies:
**28** - Views:
**2904**

### Re: Matrices and how they transform graphs

Other than that, it looks good. Hmhm, corrected it now. Now, if I were to generalise it,then the whole thing, as I see it, would be: \begin{bmatrix}a & b\\ c & d\end{bmatrix} \begin{bmatrix}e & f\\ g & h\end{bmatrix} = \begin{bmatrix}1 & 0\\ 0 & 1\end{bmatrix} = \begin{bmatr...

- Sun Dec 13, 2009 7:18 pm UTC
- Forum: Mathematics
- Topic: Matrices and how they transform graphs
- Replies:
**28** - Views:
**2904**

### Re: Matrices and how they transform graphs

Okay, I've been thinking about that. So if: \begin{bmatrix} 2 & 4 \\ 5 & 6 \end{bmatrix} \begin{bmatrix} a & b \\ c & d \end{bmatrix} = \begin{bmatrix} 1 & 0 \\ 0 & 1 \end{bmatrix} then 2a + 4c = 1 2b + 4d = 0 5a + 6c = 0 5b + 4d = 1 I'll use simultaneous equations here t...

- Sat Dec 12, 2009 4:15 pm UTC
- Forum: Mathematics
- Topic: Matrices and how they transform graphs
- Replies:
**28** - Views:
**2904**

### Re: Matrices and how they transform graphs

I think it depends entirely on your exam board and the order your teacher decides to introduce you to it. I'd suggest reading through your fp1 textbook (if you've been given one) or asking your teacher. If you want a short introduction to some rigorous proof techniques, I'd sugg...

- Wed Dec 09, 2009 8:06 am UTC
- Forum: Mathematics
- Topic: Matrices and how they transform graphs
- Replies:
**28** - Views:
**2904**

### Re: Matrices and how they transform graphs

Checking a few matrices and saying "yes, they work" is enough to motivate a conjecture, but it is not a proof. You need to show that it works for all matrices, not just the 10 or so you looked at. That is, you need to show that, for any matrix A = \begin{bmatrix}a_{1,1} & a_{1,2} \\ a...

- Tue Dec 08, 2009 10:54 pm UTC
- Forum: Mathematics
- Topic: Matrices and how they transform graphs
- Replies:
**28** - Views:
**2904**

### Re: Matrices and how they transform graphs

A scalar multiple of \begin{bmatrix}1 & 0\\ 0 & 1\end{bmatrix} would be \begin{bmatrix}2 & 0\\ 0 & 2\end{bmatrix} , \begin{bmatrix}\pi & 0\\ 0 & \pi\end{bmatrix} ie for any constant c, cA is a scalar multiple of the matrix A. So if A = \begin{bmatrix}a_{1,1} & a_{1,2} \\...

- Tue Dec 08, 2009 10:36 pm UTC
- Forum: Mathematics
- Topic: Matrices and how they transform graphs
- Replies:
**28** - Views:
**2904**

### Re: Matrices and how they transform graphs

Scalar multiple means multiple of. What I was saying before is that multiples of I are the only matrices that commute with every other matrix. There are, however, pairs of non-identity matrices that commute with each other, for example in 2 dimensions, any 2 rotation matrices will commute. Yes. How...

- Tue Dec 08, 2009 9:17 pm UTC
- Forum: School
- Topic: Your Schedule
- Replies:
**655** - Views:
**164967**

### Re: Your Schedule

My schedule is pretty much constant for the year.

Geography

Maths

Further Maths

Physics

It may not look like a lot, but this is A levels, so I only have 4 subjects, maximum.

Geography

Maths

Further Maths

Physics

It may not look like a lot, but this is A levels, so I only have 4 subjects, maximum.

- Tue Dec 08, 2009 8:13 pm UTC
- Forum: Mathematics
- Topic: Matrices and how they transform graphs
- Replies:
**28** - Views:
**2904**

### Re: Matrices and how they transform graphs

you're right, matrix multiplication is in general not commutative (order matters). reflecting then rotating gives something different to rotating then reflecting. a minor point, AS=SA for all A iff S is a scalar multiple of the identity matrix. You might like to try proving this yourself, it's not ...

- Tue Dec 08, 2009 8:13 am UTC
- Forum: Mathematics
- Topic: Matrices and how they transform graphs
- Replies:
**28** - Views:
**2904**

### Re: Matrices and how they transform graphs

One really important property of matrices & transformations is that you can combine transformations by multiplying their matrices. This is extremely useful when doing 3D graphics, eg in games. So, you're basically saying that if I multiplied two matrices like so: \begin{bmatrix} cos\theta &...

- Mon Dec 07, 2009 10:07 pm UTC
- Forum: News & Articles
- Topic: Navy SEALs brought to trial
- Replies:
**225** - Views:
**14716**

### Re: Navy SEALs brought to trial

Your rights are not contingent upon your actions. Needless abuse is needless abuse, and should be addressed. Of course, but do we have any actual evidence that the SEALs punched him? It may be a cause of self-harming to... I dunno, get off with a lighter sentence? I don't know if abuse like this wo...

- Mon Dec 07, 2009 9:31 pm UTC
- Forum: Gaming
- Topic: Team Fortress 2
- Replies:
**4429** - Views:
**411577**

### Re: Team Fortress 2

There's this one Control Point / Arena map with shipping containers near its central point, I think it's Granary. I recently amused myself by playing as Spy, using the Cloak and Dagger to camp on the shipping containers, and periodically sniping Heavies. I killed one or two and maybe another class ...

- Mon Dec 07, 2009 8:39 pm UTC
- Forum: Gaming
- Topic: Black Mesa (Very Sourcy!)
- Replies:
**187** - Views:
**32239**

### Re: Black Mesa (Very Sourcy!)

If they don't have subtitles, I'll contact the team and see if they'll let me make them and get it rolled into a patch. I'm pretty sure they'll have thought of it, but you bring up a damn good point. No need to worry, I've already posted on their forums, and the people over there have confirmed tha...

- Mon Dec 07, 2009 7:17 pm UTC
- Forum: Mathematics
- Topic: Matrices and how they transform graphs
- Replies:
**28** - Views:
**2904**

### Matrices and how they transform graphs

In my F.Maths class today, we were learning about matrices such as the identity matrix, and so on. Halfway through the lesson, I was bored so I decided to draw a graph, with a parallelogram on it. By multiplying the co-ordinates of the points of the parallelogram on it by a matrix, \begin{bmatrix}0 ...

- Mon Dec 07, 2009 7:01 pm UTC
- Forum: Gaming
- Topic: Black Mesa (Very Sourcy!)
- Replies:
**187** - Views:
**32239**

### Re: Black Mesa (Very Sourcy!)

So they've officially canned the 2009 release date and it appears the game will be landing in Q1 of 2010. The way they have been talking about it seems to indicate that it's damn close, and they're play-testing it every so often according to the Steam page. Aw, what a shame. I was looking forward t...

- Sun Dec 06, 2009 7:17 pm UTC
- Forum: News & Articles
- Topic: MIT team wins the DARPA challenge
- Replies:
**16** - Views:
**2212**

### Re: MIT team wins the DARPA challenge

But that is a completely implausible assumption. More balloons means that the chance that anyone sees a balloon goes up. Besides, there was a whole team on the search, not just one person who had to stay alert all that time. Yeah, that's what thinking in Maths does for you. It produces implausible ...

- Sun Dec 06, 2009 5:49 pm UTC
- Forum: News & Articles
- Topic: Amanda Knox Trial
- Replies:
**55** - Views:
**8637**

### Re: Amanda Knox Trial

I've never thought of Italy as having a good justice system, like Diadem's pointed out. I suppose a way to determine whether they broke the window to 'misdirect' the police was to see which side the glass from the window was. If the glass was on the inside, then it's probably legit. Otherwise, if it...

- Sun Dec 06, 2009 5:36 pm UTC
- Forum: School
- Topic: Awesome Teacher Quotes
- Replies:
**1764** - Views:
**405024**

### Re: Awesome Teacher Quotes

In my Geography lesson the other day, we were talking about population, and statistics. We used the Spearman's Rank to determine if two particular statistics were related. After comparing the GDP and Death rate, which were proved to be inversely proportional, my teacher then said: "Wait, that s...

- Sun Dec 06, 2009 5:07 pm UTC
- Forum: News & Articles
- Topic: MIT team wins the DARPA challenge
- Replies:
**16** - Views:
**2212**

### Re: MIT team wins the DARPA challenge

Dobblesworth wrote:Only 10 balloons - they should have stepped up the figure by a factor of 9.9

Assuming that the time taken to find the balloons would increase in a linear line, then the time taken would be approximately 89.1 hours. What fun, staying up for 3 and a bit days to win the cash prize.

- Sat Dec 05, 2009 11:20 pm UTC
- Forum: Gaming
- Topic: Warhammer (fantasy and 40k)
- Replies:
**383** - Views:
**93601**

### Re: Warhammer (fantasy and 40k)

At the moment, I have two armies - one for Warhammer and one for 40k. The Fantasy army is Orcs and Goblins, with the 40k being Chaos Marines, but I was kinda thinking of swapping to Orks, because I like their style. However, a problem exists with my armies. Both of them are shoddily painted. Like, r...

- Sat Dec 05, 2009 10:32 pm UTC
- Forum: General
- Topic: Who the dickens are you?
- Replies:
**10922** - Views:
**2420339**

### Re: INTRO THREAD THE THIRD

Shouldn't this be "this is the perfect forum" or "these are the perfect fora"? Yeah, it should be, thanks. Don't be so shy, go ahead and post stuff in the computer science, science and math forums or whereever you like to your heart's content :) . Normally, I would, but, to use ...

- Sat Dec 05, 2009 9:04 pm UTC
- Forum: General
- Topic: Who the dickens are you?
- Replies:
**10922** - Views:
**2420339**

### Re: INTRO THREAD THE THIRD

Heya guys, just wanted to say hello. My name's Mungo, I'm from Norwich and I'm 16. I have an interest in Computer Science and Maths/Physics, so these is the perfect fora for me, if a bit too advanced for me. :P (Year 12 in the UK at the moment, studying Maths, Further Maths, physics and Geography.) ...