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If you understand where the distance modulus formula came from the q comes out: M = m - 5log (d/10), as d is in parsecs and you know M is magnitude 10 pc away the formula in other words is: m1 = m2 - 5log (d2/d1), sub in values and you get the answer. THe thing thoguh with this qustion was...

Thats prob true i got 94 last year and i thought i struggled(prob worst exam ive ever done), prob 75-80 percent raw. Then again tho i may have marked myself hard, the 94 was the shock of my life i was expecting 80s. trust me guys, u'll all be pleasantly surprised at how much ALL hsc subjects...

The units are g/mol...

No way would u lose 5 marks, 2 marks for usng the wrong exp, if ur risks and limitations were sufficient they should give u marks for them. Also with the solvay thing, dont they hav to cool nahco3 b4 it becomes insoluable, as its slightly soluable at high temps (and even room temp), has to b...

Yeah u got a point, but for several of the models u could hav results eg for mine the transfering of water from two test tubes with two diff sized pipettes, the results was after several repititions the vol ofwater stayed the same in both test tubes. In regards to the risks i had to bs and...

LOL same!! Shouldve read the f-ing q :(

I'm not sure if u they actually make detergents from saponifiation, but my point was that the development helped us understand more bout why soaps clean. When we learnt that we learnt we can mimic it with synthetic detergents.

P.S if u wanna know how ur graph was meant tolook like check 03 q 25, and look at the alkanols line. I dont think they wouldve cut marks for not starting at meth, but u never know.

i wrote with the development of sapon we learnt more about the chem structuve of soap and how it cleans. this led to development of synthetic detergents. thent alked bout how u can get different types all for different specific cleaning, and therefoere had a good impact on soc, then talked bout...

HOpe u do, but imho because its an actual equilibrium, it isnt a model...

lol i did the same thing, when i read its theoretical value should b more than 2000 i was like wtf it is... Oh shit, does anyonen have a rubber

Sorry cookie, that was an ANALYSIS of an equilibrium. A model wouldve been something more like this: Get two one hudred ml test tubes, one filled the ohter empty get two pipettes, 1 10ml the other 20 ml transfer water from full test tube with 20ml and back with 10ml repeat until no change is seen

THere was no need to put your line through the origin as the smallest mass of an alkanol is meth. I did a line of best fit with crosses and started my graph from meth up, the line doesnt mean anything for any mass less than meth, but then again it doesnt mean anything for values in between meth-...

I was at wentworth at 8. The coloured carves, tops and skirt q was liek sudoku, cept with only 3 things :P Thank god for all that procrastinating and playing doing sudoku on saturday mornings lol.

Hey aussiechia, if you can remember do you mind telling us what total percentile you got for umat the 2nd time u sat it, so it gives us an idea of what we need to achieve. Cheers

I did it last year. I can't believe you're allowed to do it in yr 12, and having said that it'll most probably clash with your studies. I found it a bit much last year... i guess the moral to this story is dont become the financial director, bs no glory job :mad1: . lol

Yup, that what i got :D

Wow that story is a lot like a short story I've read called, "Through the Tunnel" by Doris Lessing.

If you're trying to figure out the answer to this question by drawing lines back and forward you are making it hard for yourself. The reason i gave this question is that you can do it in one line and about 5 seconds if you use your head a bit...

Oh yeah, sorry, i kinda posted teh answer and completely forgot to put up a new question. Ok here goes, not really a hsc type question but yeah... Two cars are 1.5km away from each other. Both are travelling at a constant velocity to each other, one at 5m/s and the other 10m/s. There is a...