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wait i just realised i still dont ge tthe last one....waht do they mean by "range", do they mean wavelength or frequency?

thanks ..i didnt know about fibre optics

thanks man

ive got one more year left!

Hi guys!! Ive got an assesment coming up on The world Communicates.. They say that u can bring notes on the following dot points... - outline how the modulation of amplitude or frequency of visible light, microwaves and/or radio waves can be used to transmit information -discuss problems...

ok...so do we just disregard the fact that angle -59 is negative, and just take it as positive 59. Then we subtract it from 180?

Hi guys. Theres this Q which im stuck on...help will be appreciated.. The Q is , Find the angle of inclination of the line K (5x+3y-10=0) to the positive x-axis. I know the gradient is = tan theta...but the gradient is negative, so i get a negative angle... ie -59 But the answer says 121...

lol...i came back on this thread just to say the same thing!

Hi guys!! my subjects are 3 unit maths Physics Chem Business Eng Adv I was just wandering what difference in marks/ranks would be required if you were to score a UAI without EXT 1 Maths. I am aiming to get 99+, but i am feeling that i am not that good at EXT 1. If i do drop EXt 1, does that...

OMG>... kicking myslef for that!!! lol...thanks

look in resources section...heaps of stuff on Cu extraction their

how did u get 58.93 as the molar mass of Cobalt, shoudnt it be 12.01+ 16?

^ thats what i did and i got the wrong answer, well that probably measn the anwers are wrong.... what about the first Q? any ideas

Hi, can anyone help solve this questions Q) A compound of mass 2.41g is obtained when 1.77g of coblt is reacted with oxygen. The emperical formula of the compund is ? and Q) Excess dilute sulfuric acid was added to 3.00g of Calcium Carbonate to form Calcium sulfate, carbon dioxide and...

lol...if i dont get 99+, ill commit suicide:bomb:, if not..my parents will kill me.. but i think i could of tried harder for the exams we just had...so i should be able to get up the top 10, if i actually try..

im confused...i understand how to do the maths, but i dont really understand what they are asking for....wtf is % purity??

if u put the hard work, u will actually start to find it interesting.... :) if u dont put in the hard work...well...its a pain in the ass.!!:burn:

yeah, the head teacher was like, this is the largest grade weve had in this school. btw...how are u going soo far?

thats for HSC external mark right?...

lol...i typed it up in google and it only came up with one.....but anyway, its Cherrybrook Technology High School