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yes since the beginning of time.

Has anyone ever been told that when doing banked curves, make it so that the centripetal force does not push towards the centre but instead AWAY from it? If not, how do you logically resolve the forces? Do you tend to prefer to resolve horizontally and vertically ALL THE TIME or use...

I don't think thats right because it should be - (mg + mkv)/m and that simplifies down to a = - (g+kv). I'm not all that sure about this but from all the textbook questions I've done, I don't recall seeing one where you have to find the value of k. In general, they make you integrate and then...

I don't have the book on me so if anyone could post up the question it would be great. Its question 22 of ex 25D, the one about the cricket ball. I tried to get the answer but just failed, its 7m/s. Here is my solution below. If someone could correct me on what I did wrong, that'd be great.

really i just think it matters what your answer is for the acceleration. If that's wrong then everything else is wrong.

AAS is used to measure the ppm and possibly ppb concentration of metal cations, for example Pb and Zn that are present in soils and waterways. These metals need to be monitored as they can be heavy and toxic, causing damage to not only us but marine life and instigating many other environmental...

Link please?

OP obviously your english dept aint doing you any favours *laughs at school typo in poll*

this was sorta bugging me for a bit as well. It seems that air resistance has a component of mass in there so what I normally do is this: F = ma = -mg - mkv therefore a = -(g+kv) For some question however that say F(r) = kv, then you don't treat it as mkv. About the resistance/retardation...

nothing wrong with your subs. Are you planning on picking up anything for the yr 12 course? MX2, EX2 or the language extensions? If so try and limit your units to 12, 13 at the most otherwise it will be a VERY stressful year for you.

between 3-10 minutes. Depends if im on a rush on a school day or buggered after a run so hardly can move haha.

if you choose to ignore what people are saying then why ask for help :S

I put in 86 phys, 86 MX2, 92 MX1, 91 ESL and 84 Chinese Cont. and that gave 96.25. You should get 95 IMO if your doing moderately decent at MX2. What are you exam marks like?

95+ hard to say. Any ideas of what the band 6 rate for your subs are at your school. Might help more.

all the different discharge tubes, the demonstration of radio waves Modelled Von Lenard's experiment with the stopping voltage stuff modelling of semiconductors meisner effect one.

LOL so this is what you do in your spare time.

I don't go to a private school. Not that I am, but what if I was struggling in chem? Besides when most of the stuff in chem is just basically memorising stuff, a lot of the most obvious stuff slips people's minds as evident through pwnage not even mentioning your point.

We could always swap questions for Ancient. Theres hardly anything in terms of past papers besides HSC. What do you do? I do Sparta, Tiberius Gracchus, Political Revolution in Rome 133-79BC and P&H

Its hard to say because we don't know the performance of your cohort in english. My school is 22nd but we only get 25 band 6's in english. I'm 26th atm grr! I'd say you guys would get 20 purely based on ranks and that your cohort is greater than 120. In that case you'd need to be at the bare...

yeahh i must confess that i didn't check what school he was from when i took the estimate xD Now that i know it was your school maybe I was being a bit stingy =P With the part about the cohort being the best ever, in Girra we say the same thing too. For example, we got more stake rankers in yr...