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  1. B

    Please label this sensory neuron - biology P1

    I know that the cell body is the little circle, but what about the 2 ends? What area are they found? Thanks a lot!
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    A chemistry mcq question...

    22)why is it D? The examiner said, ''Zinc is not a very reactive metal and neither its carbonate nor its hydroxide is soluble in water"... but what does solubility have to do with reacting with acid? I don't get what the examiner said nor do i get why the answer is D... can you help please...
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    Chemistry paper 1 doubts!!

    Ok i go first ! http://www.xtremepapers.com/papers/CIE/Cambridge%20IGCSE/Chemistry%20(0620)/0620_s03_qp_1.pdf questions 39 and 38. For 38 the answer is B. For 39 it's C. Why?? Thanks a lot and feel free to put your questions here!!
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    A really hard chemistry question that keeps kinda repeating

    Alrighty its question 5b. http://www.xtremepapers.com/papers/CIE/Cambridge%20IGCSE/Chemistry%20(0620)/0620_s09_qp_3.pdf Anyone know how to get the answer ? The mark scheme says: T3(PO4)2 Explain why 8cm3 react fully Comment about mole ration HUH?!
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    Complete this equation : Pb(NO3)2 + NaCl →

    This is from a past paper and i have NO idea how to complete it :/ How am i supposed to know what we get ? I only know how to work out the products if its like an acid and a salt or anything to do with acids and alkalis, but how do we do this one?! Thanks so much im really worriedddd
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    A question that has come up twice in paper 6

    Ok, this question came up twice, one in 2011 and one in 2005 (both june/may). Basically they give you a table with a quantity and tell you to underline the most appropriate value.. Most of them need a little bit of thinking but there is one that is bugging me a lot. Here it is, one from...
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    how do you draw this circuit (phys paper 6)

    The three lamps are now connected in parallel with one another. Draw a circuit diagram of the three lamps connected to the power supply. Include in your circuit diagram (i) an ammeter to record the total current through the lamps, (ii) a variable resistor to vary the brightness of all three...
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    Amazing notes for physics paper 6!!

    Centre of mass experiment (with the lamina): How to minimize inaccuracy when marking the lines : you view the string directly in front of card. Why angle i is NOT equale to angle r in ray experiment: - thickness of pins -thickness of mirror -protractor is not precise In an experiment to do...
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    Meaning of 'within the limits of experimental accuracy'?

    Please can you guys explain this as it is found in nearly every mark scheme for physics paper 6!! Please be detailed as this not only helps me, but others too. Thank you. Also, what does 'make sure your points are within half a small square' for graphs? :)
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    To those of you who do not understand displacement of ammonia from its ammonium salts

    Ok, so today i'll be explaining this concept. So first off, i want you to imagine a lump of soil in front of you. Now, this soil has certain fertilisers in in that actually make it a little bit acidic. This is of course NOT good for the crops that are growing in it. So what do we do? Well...
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    Alkaline hydrolysis of esters - me explaining it to you guys!

    Hi, ok so i just revising chem paper 3, and thought, hey, i should write what i just learnt on here! So here is the explanation of the alkaline hydrolysis of esters! Is this on the syllabus? I don't know lol but its in my chemistry book so worth learning ;) Esters can be hydrolysed to an...
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    Structural isomerism.

    hi everyone, This is a thread made for structural isomerism, as a lot of people don't quite undesrstand its concept. First off, we will start with explaining it and its concept, and after that, people can post problems to do with it. Ok, so i'll tell you my doubts about it, as they're general...
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