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very well done, its just that ur method was 7 words and i couldnt really follow the idea behind it

how do u prove the last result?

i dont remember studying them, i think that they popped up in the 1999 HSC exam paper q 7 or 8, any pointers on what they are/ how to use them cause i cant see them in my text book. thanks

ur right my bad. darn those silly mistakes!!!!!!!!!!!!!!

for the last question have u concidered the different ways in which someone can hold am amount of objects? your method is a bit vague, i mean if someone has 5 objects and the other has (n-5) then there are nC5 ways in which this can occur. or am i just over thinking

ha webby i did all mine at once so i didnt see any of ur answers, plus u forgot to multiply by 2 in your driver seat one, EDIT--i mean u wrote it down but u didnt calculate it

1 2 cases, you use either all 5 numbers, 5! ways or only 4 in the case of 4 you have 4 options for ur first number ( needs to be greater than 4) and the rest can be anything so its 4x4x3x2 add them together and its 216 ways 2 if 2 or 1 occupy the first position, then the amount of...

let the roots = a and b a + b = p ab = -9 now 2(a + b)= ab so 2(a + b) = 2p = -9 p=-9/2 easy, dont know how u did it any other way

if anybody wanted to know, they dont collapse because they form standing waves, in which the potential and kinetic energy added together remains constant. this drove me insane as i tried to figure it out.

check the marking guidelines for that question, i saw it was on last years paper from memory it was explaining the problem, being that classical physics couldnt account for the graph. giving plancks solution of quantinisation and the ramifications of accepting a new quantum theory over classical...

this looks like its related to keplars law of periods, a bit too hard to type up though so just check ur text books

this looks like its related to keplars law of periods EDIT --- i really dont know why this came up twice

things to note. 1.start by dividing the problem into two seperate motions, one verticle and one horizontal i denote horizontal as x and verticle as y, and angle will = @ 2. using triganometry, you can find the seperate motions of these two things. construct a right angle triangle with the...

so far ive planned to use Mary McAlees defence of freedom and Martin luther Kings i have a dream, but im not sure what other speech would best gel into the specific human rights genre. any suggestions? thanks

dont worry i got it.

Explain the stability of the electron orbits in the Bohr atom using de Broglie’s hypothesis. this frustrates me. i understand de broglies proposal of wave particle duality for all matter, but i cannot see how it stableises electrons. how does this propsal stop an electron from being attracted...

i figured out that the cubed root of 31 is closer than 22/7, but its still irrational

it was so long ago... thanks. the reason y i asked this was in transistors and intergrated circuits, it said the power output was greater than input, and i got a bit unsure with how that was possible

i get voltage, resistance, current, but there are two things im unsure about. Power? why do we measure stuff in it? what purpose does it serve. is it just on about efficiency or something else? because its made up of the three things above is it really nessesary? also what unit relates to...

man i hate the semiconductors topic, its the only one i cant get my head around. thanks for te help it makes a bit more sense but ive got to go over it again probably from the start to make sure i get it.