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Well...*ehem*...sorry about this guys but I just did a *really* silly mistake... I forgot to add in the +5 halfway through my integration because I was doing it without thinking properly. :chainsaw: I missed this even though I checked over my working out like three times, and only noticed it...

I did this, yet you still have to use the fact that at t=0, T = 20, which would lead to the whole undefined thing above. Also, wouldn't dT/dt = 5 - k(T-M), as it is still cooling as it heats up? Or am I still misunderstanding the first part of the question :/ ? Edit: I'm going to try it again...

The full question is: " A body initially at room temperature 20 degrees celcius is heated so that its temperature would rise by 5 degrees/min if no cooling took place. Cooling does occur in accordance to Newton's Law of Cooling and the maximum temperature the body could attain is 120 degrees...

No to which part of the question?

The first part of the question is: "A body, initially at room temperature 20 degrees celcius, is heated....." They gave me Newton's Law of Cooling, which is: dT/dt = -k(T-M) where M = the surrounding temperature, T = the temperature of the body and k is just a constant. I...

>By only having 2 people in your class, you have to be careful, because I'm guessing your teacher shows you how to do it, then asks you to bring any questions you don't get to them. This is actually...exactly what happens. Why would this be bad? Haha my school hadn't ever offered it at all...

Argand I feel excluded for not bumping into Lactus Rectum yet, though Haha I'm using De Moyv-res from now on.

Harder 3 Unit. I'd sacrifice the entire topic just to get rid of circle geometry from the course.

Done: Complex numbers, graphing, integration and polynomials We have conics (starting next week), mechanics, volumes and adv. three unit left.

Oh, sorry! Didn't know there was already a similar thread! Cool, so we're not far behind. Is conics a long topic? Haha yeah there are only two people in my class doing it, and the other person isn't doing the HSC this year. So I guess that speeds things up? I really wish my school let me...

Just checking if I'm far behind everyone else, since we started the whole subject an entire term behind. The topics we've done so far are: 1-Graphs 2- Complex Numbers 3- Integration 4 - Polynomials Starting conics next week, and we've got mechanics, volumes and Adv. 3 Unit left. So...

g is just a constant representing the acceleration due to gravity. It is *not* a negative value because there's no direction specified, so a negative value would not be appropriate. When we're talking about a body affected by gravity, however, the gravity accelerates it downwards at a constant...

In one of my textbooks, the final rule for naming if there is more than one possible name is: "The correct name is the one in which the lowest locant is assigned to the functional group cited first as a prefix" i.e. it goes by alphabetical order In another, the final rule is: "The...

Woops! My mistake :redface:. Thanks for pointing that out. The answer wouldn't be 27, though, seeing as have to be different colours. So it'd just be 3C1 * 2C1 * 1C1 (First can be from any three baskets, second from the remaining two colours, and third from the last) = 6

1) i) In each basket, there are three identical balls, and we want to select one out of each one. To select three balls of different colours, we just take out 1 ball from each into each place: ^3C_1 * ^2C_1 * ^1C_1 = 3 * 2 * 1 = 6 [1 ball from any of the three, another from the other two...

At the moment, I have 11 units --> Advanced English, Chemistry, Physics, Visual Art and Extension 1 Maths (+AdvancedMaths) Due to a change in principles in my school, I was finally offered 4 unit maths last week (a bit late I know). However, I have to drop a subject to be able to put in 4 unit...

Eh? In my experience, only the "Cosmic Engine" part of physics was 'mostly' history and impacts of science. The rest is generally heavy on the maths and the applications of some concepts. (I'm talking completely about Year 11 here, by the way)

Got mine as well MUCH higher than expected - I was sure I failed geography and history! Computing - 99% Science- 92% Maths - 90% Geography - 89% History - 88% English - 82%

Sorry about that :$ fixed my signature haha :$ you may now disregard all my posts :O

Yes according to my maths teacher; extensions 1, 2 and 3 are the current names for 2, 3 and 4 unit respectively. Edit: whoops got it wrong :$ :$ this is embarrassing :L Extension 1 = 3 unit :L I'm sah stewpid >.<