Search results

The diagram is the key to this question, i THINK they provide u with one If not, draw a normal diagram for a particle projected from the origin After that mark a dotted (horizontal line) of y = 4 (this is the height of points (or walls?) At the points of intersection of the horizontal...

"To determine the sulfate concentration in a liquid fertiliser (aqueous solution), an analyst first diluted 50 mL of the fertiliser solution to 250 mL, pipetted out 25 mL of the dilute solution, added 200 mL water to it then precipitated the sulfate with barium nitrate solution. The...

lol its ok! misreading questions is fun...

who said i never came across that method? i misread the question and thought it was a typo

yes.....i see

impossibru! with roots only 1/a + 1/b?? 1/b+1/c etc?? are u asking for equation with roots: 1/a, 1/b, 1/c?

Yes, I just hope that u didnt use product rule

thanks bro

no Firstly, pH = -log_{10}[H^+] secondly, acetic acid doesnt not completely ionise and hence u dont know the exact concentration of H+, hence u cannot find the exact pH

yeh i think ur right, i lost the file of this question so i tried to recall it lol, good job (it failed to trick u because u got the idea...)

Dont' worry about it, i got it

sorry made a mistake, sorry for the confusion In this question, imagine this chemical equilibrium in ur mind! \small CH_3COOH_{(aq)} + H_2O_{(l)} \rightleftharpoons CH_3COO^-_{(aq)} + H_3O^+_{(l)} Add water --> dilution --> decrease acidity --> less H3O+ ions --> system wants to produce more...

$A particle executes a type of linear motion. The equation for its path is given by: $v^2 = \frac{t}{x}.$ If the particle initially begins at one metre to the right of the origin and keeps going to the right, \\ \\ $ $Prove that $ x = \sqrt[3]{(1-t\sqrt{t})^2}

Discuss the impacts of exchange rate volatility Can anyone, please put in dot pts, what would be the main ideas that a human must discuss to achieve maximum marks for this question Thanks all i can think of is talking about effects of low AUD and high AUD...

Re: HSC 2013 3U Marathon Thread Did i do it correctly?

Add water --> dilution --> decrease acidity --> increases pH so A or C \small CH_3COOH_{(aq)} + H_2O_{(l)} \rightleftharpoons CH_3COO^-_{(aq)} + H_3O^+_{(l)} If we decrease acidity...that means less H3O+ ions, by Le Chatelier's Principle, a disturbed system shifts to counteract change, hence...

hahahahaha!

Re: HSC 2013 3U Marathon Thread $Let $ z = \sin^{-1}(x-y)+\sin^{-1}(y-x) \\ $Sine both sides $ \\ \\ \therefore \sin(z) = \sin\left ( \sin^{-1}(x-y)+\sin^{-1}(y-x) \right ) \\ $Let \alpha = sin^{-1}(x-y) \rightarrow sin(\alpha) = $\frac{x-y}{1}, ($Then draw a triangle) \\$ $Simiarly, let \beta...

1. e^{20k} = 2 Imagine a hammer smashing down the "20k". Where can the e go? It goes to another universe, transforms into an "ln or log base e" and attaches itself to that lonely 2 2. e^x = 0 x = ln(0) = impossibru U can draw out the curve y = e^x. Notice that y > 0? Therefore y =/= 0...

Re: MX2 Integration Marathon Very nice! i didnt actually know how to do it lol i got it from: http://web.mit.edu/abhinavk/www/integrationbee/qual2012.pdf (which was posted by a member of BoS a while ago)