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ye i know anticlockwise 90 degrees is times i .. but the problem is, i cant get the vector of z4 - z1 :(

i cant do the second question :(

:( anyone can helpp?? thankssssssss!!!!!!!

Thanks A Lot :)

our coming assessment task is a research about globalisation on a country other than Australia.. the research worth 5%.. and then we will hv a in-class essay which is 15%!!! I chose China and i hv already finished the research part.. in the research, i talked about: 1. Economic growth (%...

oh.. so i will probably do China then~ thanks everyone

Anyone here do Economics? What country did you choose for us globalisation essay? its like 3/4 of my class chose doing CHINA!! im thinking that the marking will be tough since its really competitive..:( But obviously CHINA got the most information to do it? Im deciding to do Brazil.. is that...

is it really beneficial to register as a premium member? i want to get the premium notes and order discounted books.. but does it really worth? $20 for 2 years.. but its only useful for me for 1 year..

ohh thankyou!!!!! :)

-------------- horizontal velocity = 23cos30 = 19.9 vertical velocity = 23syn30 = 11.5 then it will be wrong =(

and here,.. d) maximum height: Vy = Uy^2 + 2Ay x change in Y 0 = 8.1^2 + (2x-9.8) x (change in Y) change in Y = 3.3m thus maximum height = 3.3m time taken to reach maximum height: vsin angle/9.8 23sin30/9.8 = 1.17 s -- how can u get the Uy= 8.1 ? i thought 8.1 is the Vy .. (ans of...

i dont understand here :( a) vertical component: 23sin30 = 11.5 Vy=Uy+AyT Vy = 11.5 x (-9.8 x 2) Vy = -8.1 (8.1ms-1 downwards) b) Horizontal component: 23cos30 = 19.92 Vector vertical + horizontal: V^2= 8.1^2 + 19.92^2 V= 21.5 ms-1 tan-1 8.1/19.92 = 22.1 degree to horizontal In b, to...

oooo i love you!!! thankyou so muchhhh

A football is kicked off the ground at an angle of 30 degree to the horizontal. It is initially moving at 23.0 ms-1. Calculate : a) The vertical velocity of the ball after 2.00 s (ANS* 6.1ms-1 down) b) The velocity of the ball after 2.00 s (ANS* 21.5ms-1 22.1degree to horizontal) c) The...

OMGOSH jersey's name due next friday.. still hv no ideas... i hv no any special nicknames :X My name is Coey .. anyone have suggestions?

lol SC is nothing at all~ compare to HSC

Re: Does anyone agree that the Preliminary Exams are much more difficult? so will the HSC papers next year similar to those preliminary papers :confused: ?

Does anyone agree that the Preliminary Exams are much more difficult? Its not about the quantity, but also the quality of the papers.. Even you have really studied hard, still doesnt mean you will get a good mark. Especially in my case, im not as intelligence as the other ppl.. i always hv to...

if deep water is more dense, how can waves travel faster o_o? isnt it less dense -> denser = slow down denser -> less dense = speed up/?

Is deeper water less dense or denser? in my textbk, it says: Plane waves travelling from deep to shallow water. As each wavefront encounters the shallow water it slows down, creating a bend in the wavefront. This bending of the wavefront is refraction. Deeper water -> Shallower water will...