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does anyone know why i'm still studying for physics when i'm totally screwed for chem?????:confused: (i'm still hoping for a meteor...)

most use pourous ceramics to maximise the ablation of heat on re-entry. also consider the actual shape of the craft for aerodynamics. remember the first blunt nosed cone crafts... compare them to now!:D

astrophysics kicks ass on the others.... although some parts are hard. our class didn't decide on which option topic to do until we had to start it!!! but our school's only physics class has 6 prople, including me.... so it was prety easy to decide.

just to change the subject....... does anyone know how to re-arrange the Lorentz transformations formula to make v the subject? i can calculate the length contraction from velocity but can't do it the other way around. ie if Lo= 300m and Lv= 72.9m what's it's velocity. any ideas how to...

the motor cannot speed up as a result of the back EMF, or energy would be created in the system!!! The back EMF opposes the motion so the motor must slow down until there is no motion (relative). THis is why the back EMF increases when the motor is spinning faster. Thus the current is higher at...

is there anyone out there who fully understands the boarderlines of solar massess that lead to different star deaths? ie I have conflicting sources for all!! the boarder line where a star becomes a planetary nebula and white dwarf could be anywhere between 1.4 and 5 solar massess. any ideas...

what?

you need practice? i cant titrate for #@%*. i'm glad we dont have to titrate in the HSC, id be screwed. PS, did you have to wear safety glasses when you were doing all your experiments? we had this old codger who made us wear 'em to pour distilled water! (really) His theory was "i've never had...

titration contest? who are they kidding? the only thing more boring than a titration contest would be a polymer convention. I remember my first titration well... I forgot to put in the indicator! I'm still waiting for that meteor

EVERYONES done this one! you get spirit burner, (sorta like bunsen burner filled with ethanol or methanol etc. You fill a tin of water and measure the temp rise over a period of time. you then go and do a shit load of pissy calculations involving molar mass etc and calculate the enthalpy of...

I don't do any maths at all!. But i do physics and chemistry. The maths part of both are a piss! Physics kicks ass, but chem...........don't waste your time. I don't know about anyone else, but i don't think i'll be doin' much titrating in my life after the HSC. at least relativity is really...

It was only after the exam that i realized how ridiculous all our classwork was. I didn't use one note from class. We didn't even discuss 'in the wild'all we focused on was the alienation of nature and destruction of natural rhythms. How did everyone catergorize their themes. did you group them...

they do, if you remember, industry uses DC for the high power, and they have to put resistance in series when starting up the motors to stop the current burning the motor out at start-up. once they're running though a back EMF exists and the resistance is turned off.

you can tell but. Everything in the HSC has been generic! I just hope physics and chem are as easy,(I'm still hoping for a meteorite before chem)

what's everyone complaining about? I thought it was the most generalised question of the entire HSC so far. I just rehashed a memorised essay word for word, I didn't have change anything. compared with last years questions these were easy. would you rather write a conversation of Lear or an...

I understand the concept of Back EMF, but i know that if a motor slows down under a load, the motor can burn out. I also know that this causes changes to the level of back EMF and current, voltage etc, but can't find out what exactly. Is there anyone out there who can tell me? Also, how does the...

They are out to trick us. I remember my physics teacher telling us repeatedly they're not, but when it came to practice questions, we'd mark them, and no one would be able to agree on the proper answer. All we could agree on was that the sugested answers were completly wrong! we'd end up wasting...

my d&t study consisted of the 1 hour break after the bloody english exam! I wasted 3 weeks studying for brave new world and lear. who writes these dt exams? the multiple choice section is *%#@ed. theres always has at least 5 questions that have two answers that are right, and i nearly always get...