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i start english today.

E.g v = v = 6t^2 + 3t -2 or a = v = 6t^2 + 3t -2 i know for velocity and acceleration, it is the derivitive equal to zero. but how do we prove that these points are a maximum? do we differentiate again, after already differentiating and sub values of t in? ++ Another...

just a heads up for people doing standard, make sure you link your prescribed and related together, somehow, somewhere in the body and not just using conjunctions such as similarly in topic sentences. Apparently, our hsc marker teacher said this was the distinguishing factor between the top bands.

ha boo

there is no actual explanation in textbooks. However there is always at least one question on this. First of all if you are given a displacement curve: where is acceleration zero? where is velocity greatest? where is velocity lowest? when is acceleration greatest? and if you are given an...

I have another question on distance. if anyone could help me. what is the total distance travelled by x = 2sint-t from pi to zero. (using the second method). and total distance travelled by the velocity curve 2-t from t1 to 2, and from 2 to t2 (answer is in terms of t1 and t2). The the second...

please pm me. thank you so much in advance.

didn't you say distance was area under velocity curve? how could have they have used the displacement function. edit: got answer from above

i was wondering where they got 2t2 in the bracket while integrating.

^ i meant *say i had 100ml of water (oops)

here is the link: http://tinypic.com/view.php?pic=2mmdzqo&s=5#.Uj-xRH-RtTw particularly method two, not so much method one.

i was just thinking this in term of water, say i had 100ml then added another 1000ml then the ph would still be neutral. However, according to the formula ph should change. can someone clear this up. thanks

wow good on you, i'm currently in procrastination mode.

what time do you guys wake up?

7 days is a lot. study something else in the meantime.

yes

school rank 200 chemistry 1/14 bio 2/30 cafs 1/29 english standard 1/80 maths 12/28

I use pearson however the information is not sufficient. Does anyone have another textbook, please, please message me. HSC is so soon.

re: HSC Chemistry Marathon Archive i would also say b as condensation is a reaction between two functional groups.

I am having trouble answer the following questions: if anyone can help me that would be greatly appreciated. http://i41.tinypic.com/24zk3ew.png (Q14 only) http://i41.tinypic.com/2d2bu40.png (question 12) the book has answers, but no worked solutions. If anyone wants to revise by...