Recent content by abc123doremi

sydney tech aren't lame they're just low. really really low

bump bump bump. probably sleeping in anyway i got the answer but for future reference, it is because: the PbSO4 which coats electrodes after discharge disintegrates the electrodes. you can't store it in the discharged state. even in the recharged state, automatic sulphation of the electrodes...

hi why can't the lead-acid battery be stored in a discharged condition?

the answer would be silver because if you look at your reduction potential sheet, it is the furthest down from the reaction of sulphate so to make them react, you'd actually REQUIRE energy than it happening spontaneously. that is probably what i'd go to first.

there are many 4U geometical induction questions in the extension section of cambridge 3U. Chapter 8 i think it was or not. not really sure but probably

teachers are damn fucken biased they don't make any sense either well...that's english for ya it's not really english though, english is easy it's literature or language arts or whatever it's bullshit these teachers teach literal bullshit

waboo googoo daba googa labooboo poo

LHS= sin 3x . sin x = -0.5 [cos 4x - cos x] = -0.5 [(2cos²2x-1) - cos x] = -0.5 [(2{2cosx -1}² -1 - cos x] RHS =2 (2cos²x -1) +1 equate LHS=RHS to form a quadratic in cos x i haven't brushed on my double-angle formulae etc so i might be wrong but you get the idea oh and the proof they...

it was worth watching it was definitely better than the horrible fifth one the experience was good at the time - at least not as boring as fifth. however after it finishes, you'll realise it wasn't great. you need to have read the book to understand it or you'll be going wtf wtf wtf but they...

i'd like to see the hospital staff treated the same way

my maths teacher tries (and fails) to chuck the chalk in the bin after a vigorous proof on the board 'oh no, it touched the asymptote!'

right thanks

yeah i got that out but i added 2k(pi) to account for all the other possible solutions is that wrong? coz i somewhat remember during inverse in three unit that that's what you gotta do so there should be an infinite array of lines across the whole cartesian plane?

we recently had 4u half yearlies and they asked us to draw: cos (x+y) = 0 for curve sketching i'm sure it must be a line or an array of lines, but anyone know how to solve it in such a way? graphmatica gives me a line y= -x + pi/2 but then again it's not good for implicit fuctions either...

thanks