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so now Jarcaranda + excel + macuqarie = after only conquering = before so ans is AFTER?

hey excel chemistry also said its after

hey guys I found this paper fairly straight forward UNTIL I found out that I did a mistake on the last question the Fe2+, Fe3+ and Pb galvanic cell question,, I put Pb2+ reduced to Pb, and Fe oxidised to Fe2+ Which are WRONG. there are 3 marks for writing half-equations 1mark for calculating...

thankss for helping with the questions! =D

they are from catholic trials

cant do these 3 questions.. please help~~thankss

Thanks so much. Thankyou for being so helpful :D

These are the multiple choice questions that I'm unsure with.. Please help :( and there is a calculation question that I dont understand as well (q.10) Any help would be appreciated ~~ THANKS!!! 1) Acid Conc (mol/L) pH P 0.01 2 Q 0.05 1...

you guys are great` thanks heapss

1) Given that arg(z-1) = 2pi/3 and arg(z+1) = pi/6, express z in mod-arg form. 2) Given that w = (z+2)/z and z moves along the unit circle. Find and describe the locus of w. 3) It is given that z1 and z2 are two complex numbers representing points A and B with |z1|=|z2|=1...

Thanks heaps everyone~~~!! I got all those questions now :D but still stuck on this one: Find the constant term in the expansion of (1+x^3 - 1/x^2 )^5 I did it in this way: (1+x^3 - 1/x^2 )^5 = (1+ x^3 - x^-2)^5 = [ 1+ x^3(1- x^-5) ]^5 Tk = (5Ck) [(1)^5-k] [x^3 (1-x^-5)]^k = (5Ck)...

Oh ye I found it.

And is that a standard formula? nCk = nC(n-k) coz i cant find that in my textbk..

-------- By following the nCk = nC(n-k), I will get 12C(12-3r) = 12C(12-2+r) 12-3r = 2+r 10=4r r = 5/2 ??!

omg for question 1, there was typing error,, should be like this: 12C3r = 12C (10-r) yes I did expand it, but have no idea up to this step: 12! 12! (12-3r)! (3r)! = (2+r)! (10-r)! (12-3r)! (3r)! = (2+r)! (10-r)!

1.) Find r if 12C(3-r) = 12C(10-r) ANS:1 2.) Find the term independent of x ANS:-72 (x- 1/x)^10 (x+ 1/x)^4 3.) In the expansion of (1+3x)^6 + (1+4x)^5 + (1-x)^10 Find the coefficients of x^8 ANS:45 4.) Given (1+px)^n = 1+20x+180x^2+kx^3+other terms involving...

wow thanks a lot!

Oh i got the ^ question now! but can anyone do the following question for me? thanks :D Particles P and Q of masses 3kg and 1kg respectively are connected by a light inextensible string of length 2m passing through a small hole O in a smooth horizontal table. P describes a circle on...

A particle of mass m describes a horizontal circle of radius 0.24m inside a smooth hemispherical bowl of internal radius 0.25m which is held with the rim horizontal. A light string tied to the particle passes through a smooth hole at the bottom of the bowl and supports another particle of mass m...

just want to make sure if i did not get it wrong thanks. 09-10 budget Revenue side: Þ Private health insurance rebate will be reduced for higher income earners. Þ The Medicare Levy Surcharge will also be increased to maintain the incentive for those able to pay for private health insurance...