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na man, i'm aussie (european background) 'arm' are my initials there are two types of commutator split ring and slip ring a split ring commutator is connected to an external DC circuit. as the motor rotates, the current passes through the coil of the rotor (or armature) and as the coil...

yes i agree, the syllabus should be re-written properly (well i guess it has been? since its changing for '2010 and beyond') but yeah, i can pretty much read through the physiscs and chemistry silly-buses and answer the dot points as questions - they are all quite self-explanatory so yes...

i don't get why they ask: 'sketch something using the scale shown' if your using a scale, shouldn't you be ruling and stuff, not sketching?

Here's one from the 2003 HSC question 16 a) 4 marks "The telecommunications industry uses copper and fibre optics for transmission of data. State a different application for each of these materials, and explain, in terms of their properties, why they are used for this application.

ok, i will trust you with that one ...but i still want to see how my engineering teacher goes :spin:

yeah that is probs way to do it, did u get an answer? Powder Forming Powder of a high melting temp. metal (eg: titanium) is made from its ore. The powder is compacted under very high pressure to the desired shape. - this creates 'cold fusing/joining' of the particles to occur. The metal is...

from memory, my engineering teacher couldn't even do this question, i'm going to a tute tomoz, so will ask him to do it :D

Edited http://img149.imageshack.us/img149/5822/estquestionm.jpg

looking at my old working, so hard to follow, ive used perpendicular distances between point A and member between Rb and B to find the force in that member which is 92kN then it says take moments about point C which ison RHS of truss opposite Rb making up square A-Rb-B-C thats where it stops

could you please explain, thanks

Reactions http://img440.imageshack.us/img440/3715/esttruss10001.jpg [edit: good url] [incomplete] Method of sections for AB http://img440.imageshack.us/img440/5349/esttruss10002.jpg sorry about bad scan

idk, thats why i posted this question, but i got ABv = 120kN, did u get that? i will post my working so far

I don't think they are the correct reactions [edit: I had this question uncompleted in my workbook from ages ago, and have done reactions twice, both times i got answers: Ra=100 (Rah=10kN and Rav= 100kN) Rb= 130kN

yes, i got those reactions but i could only get ABv as 120kN and couldn't get ABh

I've put my preferences for 6 different uni's, so as I will defo get electrical or mechanical, although there's always the chance I won't get in at all, in that case I will go work (somewhere peasent most likely) for a year and see what happens. I might end up working anyway if I can't get a...

I thought what you have described as normalising was full annealing? This is how I understand it: Process Annealing - heat to austenite (above recrystallisation temp of 723deg C), soak, cool in still air Full Annealing - as process anneal, but cool in furnace Normailising - heat to about...

Answer: yes Question: In the following diagram; determine force and nature of force in member AB (HINT: determine reactions first)

The line is placed so that it cuts de. When you take one side of the truss for analysis, d-e will act as a force and that can be found by taking moments to find that force. (this is kinda hard to explain!, sorry) HINT: even if you are considering one side of truss with least forces but cant...

I will probably become an electrical engineer or possibly mechanical. How about you guys, who's going to become an engineer and what type?

I just had a look on the net and through my handouts, but sorry couldnt find them try http://www.boardofstudies.nsw.edu.au/hsc_exams/exam-papers-2007/pdf_doc/engineering-studies-notes-07.pdf for muti-choice answers and marking guidelines(doesnt help alot)