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did it because it was good scaling and also im ok at science so yeh ... like any subject you just gotta understand and memorise the concepts and do a test called the 'HSC' ... the thing is its not as confusing like physics

in the trial one of the question was ... in your study of motor and generators, you learnt about Edison and Westinghouse from a secondary source ... assessed the reliability of your sources ... 3 marks for these type of questions what are you meant to write to get the full mark ... seriously...

holy cr*p are you guys kidding me ... seriously everyone at our school is expected to write 8 pages each module ... and some writes like 12 in 45 minutes dont know how they managed that but

hahha shamed ... thanks

lol... same i remembered sitting there asking myself did i lose all my maths skills because of studying too much for english or what ... but i think i have to check it with my teacher because this question is not possible to integrate at the 4 unit maths level

just did my trial today theres one integration question i couldnt get ... its a 3 mark as well ... so disappointed but anyways S 2/(4+3sin[theta]) d[theta] using substitution t=tan[theta/2]

anyone know where i can get some previous trial papers with solution

F = GMm/x^2 ma = GMm/x^2 a=GM/x^2 10=GM/(6400)^2 GM = 4.096 x 10^8 F = [(4.096 x 10^8) x 500]/(4000+6400)^2 equals to 1893N

for the first one use the simpson's rule because its accurate for parabolas ... use 3 function values with the first is 0 and last is 0 and the mid is 2y the second one you should find the are of an normal ellipse ... i remember this from the arnolds book ... A = pi*a*b ...you can find this...

remember that the reaction force N is always perpendicular to the surface ... hence its 90 degrees to the tension of the string at B ... also you have to take into consideration of mg straight down ... therefore forces on B should be vertical T(1)cos30 + Nsin30 = mg horizontal...

well im kinda pissed off at my teacher because all he ever does is do the examples and thats what we do every lesson and the exercises are for homework... he gives us all the solution booklets to both the arnolds and fitzpatrick book and expect us to do all the work ... when i mean examples i...

part 1 its should be F = 20-t and just integrate to get v last part F=-40 therefore a = -4 and again integrate to get v

thanks

consider the polynomial P(x)=x^5 - ax + 1 , by considering the turning points on the curve y=P(x), prove that has 3 distinct roots if a > 5(1/2)^(8/5) its question 4(c) of sydney boys trial 2005 if you want to see the question clearer...

go over stuff you have difficulties on ... and do heaps of questions especially hard ones

is this in the syllabus because i would have no idea if it was in the test ...

about the balloon thingy ... well if you have a shape point then you can pop it rite? and well what happens next we all know ... another big bang ... hehehhe

yes thats what i meant ... because its a constant velocity the principle of relativity still holds in that circumstance ... but thanks for clearing that up about the orbital decay the total mechanical energy is E=-1/2(GmM/r) according to JAcaranda which is suppose to be the sum of the kinetic...

Obital Decay im really confused right now... in the jacaranda book it says"as a satellite slows down it loses altitude ...." which doesnt make sense at all ... think about it say if you slow down you would increase the period (say around the Earth) which is true because it would take longer to...

thanks