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    Chemistry Help!

    Camphor is a white solid which was used to make the early plastic celluloid. Camphor contains the same percentage by mass of hydrogen and oxygen. What is the molecular formula of camphor? A C10H6O6 B C10H8O C C10H16O D C10H10O2 15 Ammonium sulfate in nitrogenous fertilisers in the soil can...
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    Chemistry Help!

    Hey some help on Chemistry! I find them useful! http://www.chemsheets.co.uk/
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    How did Physics P22 go?

    Okay so i did much better than i expected! :D What was the time and magnitude of resultant velocity in Q1? And what was the phase difference? And why was The Battery A used for storage or what ever it was?
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    Physics help!

    Hey how to we make estimates of something in physics for example : 1 Make reasonable estimates of the following quantities. (a) the frequency of an audible sound wave frequency = ........................................... Hz [1] (b) the wavelength, in nm, of ultraviolet radiation wavelength =...
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    Help on Uncertainty needed!

    The mass of a cube of aluminium is found to be 580 g with an uncertainty in the measurement of 10 g. Each side of the cube has a length of (6.0 ± 0.1) cm. Calculate the density of aluminium with its uncertainty. Express your answer to an appropriate number of significant figures.
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    Help on Electricity!

    Heyyyyy! Most people have abit of problem in electricity in physics so here is some great help for it http://www.youtube.com/user/Steve4Physics
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    Biology Paper 22!

    Heyyyy! Any idea's on what's coming up for Bio tomorrow?
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    Question about graph in physics p33!

    Heyy i want all details about the graph produced in the paper ..i've heard it carries alot of marks. So, i want to know how to do the labelling of the axis and what type of graph is produced i'e curved/line of best fit e.t.c and yeah the y intercept as well (this bit specially) btw I've not...
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    Extremely urgent help needed on physics p33!

    Okay so i havn't been in a physics lab throughout the year as I'm a private candidate! So, what do you suggest i should study/go over for the practical... any sources...and will there be instructions given on the paper of how to 'set up' the experiment? It would be great help if anyone can go...
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    Organic Chemistry notes!

    Hey i have some ochem notes that are really helpful but a 'last minute revison' thingy!
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