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  1. Saturation

    False Starting a graph. Physics Paper 3

    Hello! In many physics practical papers (Paper 3), when plotting the graph, I use a false origin. I just want to confirm if this the way to plot a graph with a "false origin" : http://www.mathsteacher.com.au/year10/c ... ge5857.gif Thanks again! :)
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    Physics Practical Mark Sheme help!

    Hi! Can someone explain to me what this mark scheme means (it's about the percentage uncertainity) : http://www.xtremepapers.me/CIE/Internat ... 5_ms_3.pdf section ; a (iii) The 1st line. Does it mean that the absolute uncertainty can be from 1 to 5 , or from 1^0 to 5^0 ( which makes no...
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    Chemistry Paper 3: KI/ Starch question HELP!

    Hello all! Guys, in some of the paper 3's,there is a question ( It's usually found as a section in the 3rd question), where they usually ask you to add POTASSIUM IODIDE, followed by a few drops of STARCH solution to the sample. e.g: http://www.xtremepapers.me/CIE/Internat ... _qp_31.pdf...
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    Practical papers: Using a PENCIL?

    Hello all! Straight to the point: 1) Is it all right to use a PENCIL to mark the scales and the axes headings on a graph ? I've been using a pencil all this time, until i read in the syllabus (chem) : "The presentation medium should be pencil for lines on tables and graphs" Using a pen for the...
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    Practical papers graph qs

    Hello all! Straight to the point: 1) Is it all right to use a PENCIL to mark the scales and the axes headings on a graph ? I've been using a pencil all this time, until i read in the syllabus (chem) : "The presentation medium should be pencil for lines on tables and graphs" Using a pen for the...
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    AS Physics Practical Sig.Figures Qs.

    Hello everyone! I would like to know how many significant figures OR decimal places we are required to give numerical answers, to the more "general" questions in PAPER 3. e.g. In may/june 2010, P31...
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    Potassium permanganate

    Hi all! I know Potassium permanganate is an oxidising agent, which can turn ethanol into ethanoic acid, but i want to know what the colour change is? It changes from purple to ??? Thanks all and good luck for tomorow! :lol:
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    Chemistry Excess reactions

    Hi everyone! Can someone please explaning to me how to calculate excess amounts in reactions such as Question 7 in this paper: http://www.xtremepapers.net/CIE/Cambridge%20IGCSE/0620%20-%20Chemistry/0620_w08_qp_03.pdf Thank you guys! :mrgreen:
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    Types of current AC/DC

    Ok, i know that there is only one type of AC----> alternating current, which flows backwards and forwards, which is generated from generators. But for DC i know that there's steady DC, Varying DC. Varying DC comes from AC which has been rectified right? Can someone enlighten me about the forms...
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    Chem paper 1 ques + others

    CAn someone pls explain to mw how to do qsuestion 11? http://www.xtremepapers.net/CIE/Cambridge%20IGCSE/0620%20-%20Chemistry/0620_w07_qp_1.pdf I dont unerstand it! :? :? :? And if Aluminium is placed in an acid, will it react? I m guessing no, because of the protective oxide coating on the...
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    Potential Dividers (Explanation pls!)

    Hi everyone! Can someone please explain to me the concept of potential dividers, especially when you use a thermistor and LDR?? Thank you so much! :P Cheers!
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    Chemistry Paper 12 Nov 09 Qs (Electrolysis)

    Can some one please explain why QUESTION 14, is B??? Is Hydrogen a base??! :!: :?: :?: http://www.xtremepapers.net/CIE/Cambridge%20IGCSE/0620%20-%20Chemistry/0620_w09_qp_12.pdf ThANKS! :mrgreen:
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    Please help! Geography Question (Sampling)

    Straight to the point: What are the advantages and disadvantages of SYSTEMATIC and RANDOM sampling??? Thank you! :mrgreen: :mrgreen: :mrgreen:
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    Quick Chem questions (Not past papers!)

    Ok, some quick questions :) : 1) In the graph questions, when the say lable each graph, do we write the label names IN the graph grid or outside it?? 2) In electrolysis, do we make some substances (e.g Al2O3), molten because they are insoluble in water?, Or is there another reason? 3) For...
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    What do ammonium salts decompose to?

    For e.g Magnesium nitrate when heated breaks down into---->Magnesium oxide + Nitrogen dioxide and Oxygen WHat about ammonium salts!? THanks in advance :D
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    Chem Paper 6 Question

    Hi everyone! Can someone please explain to me how to do question 5 http://www.xtremepapers.net/CIE/Cambrid ... 7_qp_6.pdf Is this question in this paper one of the harder questions compared to the similar ones in other papers?, cause didnt have much trouble with the other papers :roll...
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