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question 3 http://www.youtube.com/watch?v=wNct9BMjR_c question 1 http://www.youtube.com/watch?v=QOSg7LFgt6Y

113, screwed up question 9 :(

the salt water does make it corrode faster, but the answer couldn't be an electrolytic reaction, for the minority that actually knew what stress corrosion cracking was (not me), salt water just makes it much easier for this to happen.

its b, not a, the brass was cold rolled, and that will cause the corrosion, not the salt water.

i agree completely with those answers, with 2 being b, not a

but regardless of friction, wouldnt you have to work it out using the displacement from the starting point, and not just the height?

i got 1008 W, its sq route of 20squared + 9squared to find displacement, then displacement times force, 1150N then divide by25 seconds to get power, i got 2.5mA and 43.23mm extension, hopefully thats right :S

i mean, there has to be two metals present, and theres only one, brass.

if you look up stress corrosion cracking, it pretty much explains that it has to be b, not a, too bad i chose a as well, electrolytic wouldnt work, since thats explained as something to do with an external voltage supply or something like that. 9/10 :(

i managed to answer every question, but some like that digital to whatever it was frequency graph, ive never heard of it but hopefully its something like a sine wave?

yeah, its 300.

99.96 definately, state rank in all subjects.

School Rank ~350 Rankings Trial Marks English Standard 3/97 74/100 Maths Ext 1 2/12 90/100 Maths Ext 2 2/3 84/120 Physics 2/14 87/100 Chemistry 1/20 88/100 Biology 2/46 70/100

School Rank 338 Overall Rankings Trial Marks English Standard 10/96 64/100 Mathematics General 4/74 54/100 Business Studies 8/35 64/100 Hospitality n/a 53/100 Food Technology 7/19 60/100 Society And Culture 3/10 67/100 I did not go that well in the trials as i'd hope, i...

school rank 338 Overall Rankings Trial Marks Mathematics 1/21 84/100 Maths Ext 1 3/12 46/50 English Standard 6/97 68/100 Music 1 3/10...

i got the independent, the third piece was quite strange, but it was good overall. i ended up getting 25/30 :(

School Rank 338 3U Maths Trial Mark 77/84 Rank 3/12 2U Maths 101/120 1/28 English Standard 75% ~7/96 Chemistry 70/100 3/20 Physics 70/100 4/15 Music 1 52/55 1/10 Engineering...

school rank 350ish 3U Maths 4/14 2U Maths 1/28 Standard English 5/96 Chemistry 3/20 Physics 3/15 Engineering Studies 1/9 Music 1/10 thanks:D