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Hey, Just wondering if there is any sort of way you can structure quotes in your notes that make them easier to remember? Cheers, l.a.

Hey guys, If anyone could provide worked solutions to the Qs below - that'd be great! 1. A hydrogen atom is excited from its ground state to its n = 4 state. a. How much energy must be absorbed for this to occur? b. Draw an energy-level diagram showing possible routes by which the...

hey en and kat, would u be able to tutor around parramatta area? im keen for some english tuition atm!

omg thanks a lot! i get it now, finally...

That's correct and what I'm always doing. But how come the answer has 2x in the ln part? Thats what I dont understand...

Hey guys, In the 2005 HSC paper, for Q1d. - where does the 1/2 come from? For any sort of 1/sqrt (x^2 + a^2)) or 1/sqrt (x^2 - a^2) - i always get it into the standard form - but book has different answers like this one... Could someone please explain this? Cheers, L.A.

Thanks guys - eh trebla how did you get the 2nd line of the LHS side? I also don't get the (k+1)th term

Hey guys, I'm trying to do the 1999 Q5 induction but I have no idea what is happening. Can anyone kindly explain the result? - especially the (k+1)th term Page 67 on the doc. Cheers, l.a.

Yep I'm going - I shall see you there ;)

Yep I'm going - I shall see I there ;)

Hey peeps, Could anyone please provide worked solutions to the Qs below? Any help is much appreciated. 1. Prove tan inverse (x) + tan inverse (1/x) = Pi/2 2. Prove 2 cos inverse x = cos inverse (2x^2 - 1) 3. Prove cos inverse a + cos inverse b = cos inverse (ab - sqrt(1 - a^2) x...

any 3 unit method of doing it?

its an identity haha - how did u get 2nd/3rd steps? i think my teacher did a different way... but at least u got it ;)

Hey guys, Any know how to solve question sin squared (5a) - sin squared (3a) The answer is Sin (8a) x Sin (2a). Cheers l.a.

Hey guys, I received an extremely difficult eng assessment about having to make a trailer or establishment scene for a theme from the movie "Look Both Ways" - i chose the theme of relationships/inter-relationships. I want to explore the theme through a guy having multiple personality...

Well, how many solutions are there to sin x = cos 2x between 0 and 2pi - some ppl are saying 3 and some ppl are sayin 4 in my class?

Hey guys, Just wanted to know something about some of the common ions such as CO3- (carbonate - minus 1 at the top) and SO42- (sulfate - minus 2 at the top) - how do these ions get these valencies or, in other words, how does one determine them? In some chem eqns for other types of ions...

Hey guys, I'm having trouble with these questions - to do with kinetic and potential energy with changing velocity Q: A body of mass 1k is projected horizontally, with a speed of 4ms-1 from the top of a rower 40m high, and strikes the ground at C. Point B is 30m above the ground...

thanks for the reply - sorry bout my late one - yeah the exercise is 16.6 and page number is 330 - question 11 good luck ^_^

Hey guys and gals, The questions below come from SB Jones/Couchman - pretty much cant figure out how to link up the required variables Here goes 1. A window consists of a rectangle surmounted by a semi-circle having as its diameter the width of the rectangle. If the perimeter of the window...