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The one's with the 0's are from the perspective of the person who is in the rest frame i.e. in the moving object but appears to them as they are not moving. To them, the person outside their spaceship or whatever they are in is relatively moving. E.g. Person in spaceship which is moving at 0.9c...

Re: Best Chemistry Textbooks/Guides? Jacaranda Chemistry 2 New Excel Chemistry Dot Point Chemistry Past Papers For practicals: Spotligh Chemistry

Hiya, Just spent 45 minutes gathering, downloading, organising and uploading these :) It's the Complete source of Preliminary Chemistry Exam Papers. http://www.megaupload.com/?d=049QS2BF Hope it helps everyone. Good Luck!

mmmz competition can be a good thing in that it gives u the motivation to study. But too much and it overshadow you and become a burden. +1 This is because when you teach others, you're solidifying the concepts in your head and removing flaws in your own understanding. If you have to...

This is actually a validity point and not accuracy. Accuracy concerns to how many decimal places and to what precision the equipment can measure results. E.g. Using an electronic weight balance with 3 decimal places instead of one with only 1 decimal place. Other problems and solutions: Loss...

Is this assesment task counting towards you HSC or is it just classwork? I can have a look at what you've done if you want and see if you've missed out any important details or give you some tips.

This is correct. As the lowest amount of significant figures in the question is 1 i.e. 20 your answer must be also to 1 significant figure. Thus the answer is 3. In chemistry we work with significant figures and not decimal places for calculations (in most cases). Titration may vary if they...

mmz you are certainly correct there. MSN is quite a useful tool, not only for studying/keeping up to date with new work but also just having chat and so its a good stress buster. The main point I meant was that once you sit down on the computer you start off checking your mail or msning for 5...

use pure/distilled water (does it float, dissolve etc). paint..not pure though. blue crystals - copper sulfate? btw is this experiment ur doing in a school lab or at home?

Thanks for spotting that brenton =)

Bromine water can be written as Br2 (aqeuous) - meaning dissolved in water. That's all you need, trust me and the many past papers that i've gone through. So it's Br2 (l) + H20 (l) --> Br2 (aq) If you really want to go into the depth then use this: Br2 (l) + H2O (l) --> HBr (aq) + HOBr (aq)

How much to study? - Time doesn't matter. Someone could study 2 hours a day another 5 hours and achieve the same result. It's all about learning the correct techniques! - Don't fall behind on maths homework! Do it as soon as you get it. If a question is taking too long mark it and move...

Yea, I've donated blood. The test your iron stores using a portable test (quick prick of the finger) and if they are sufficient then they'll let you go ahead. This test is the most painful part of the whole procedure so yea.. the blood taking doesn't hurt very much at all. Have a nice big...

In your title you mention CYLCOhexane and CYCLOhexene. Thus the equations are as such: Cyclohexane: C6H12 (l) + Br2 (aq) ----> C6H12 (l) + Br2 (aq) (No Reaction) Cylcohexene: C6H10 (l) + Br2 (aq) ----> C6H10Br2 (aq) The product is 1, 2-dibromocyclohexane (aq) For hexane and hexene (an...

As 1, 2-dibromohexane (aq) is clear and so we can see a colour change. This point isn't as important as knowing why hexane+hexene, cyclohexane+cyclohexene were used: The hexenes have double bonds (so can react with Br2) Liquids at room temp Readily available at school Cheaper than other...

if you watch naruto take down random quotes from it, it is the epitome of belonging! :P ahaha Remember, don't make it plot driven, rather, develop the characters, their personality and possibly the setting. Define their personality from their actions. Their's approximately 12 criteria from...

Hi mate, CPI (Headline): 1.3% (September 09) 5.0% (September 08) CPI (Underlying): 3.5% (September 09) 4.8% (September 08) Source: Leading Edge Education Statistics Hope it helps.

The influx of immigrants in rural areas led to their alienation in a still developing Australia and also acceptance furthered by the migrant experience within the immigrant community.

Father's age = F Son's age = S 9S=F F+5= 4 x (S+5) F+5= 4S + 20 F= 4S + 15 Simulatenous Equations: F= 4S + 15 9S = 4S + 15 (Substituting F=9S) 5S= 15 S= 5 9S=F 9 x 5 = 45 F=45 Son is 5, Father is 45.

1 builder = 3 x 40 min = 120 min 5 builders = 120min/5 = 24 minutes