Recent content by chopstick

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    What is KMnO4 in Acidified Dilute Form?

    oh oops, thank you!
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    What is KMnO4 in Acidified Dilute Form?

    ok... then, so what should i write for the molecular formula of Acidified dilute potassium permanganate?
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    What is KMnO4 in Acidified Dilute Form?

    is KMnO4 the molecular formula for Acidified dilute potassium permanganate
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    How Can I Identify Ions in a Mixture During a Practical Experiment?

    those information are very useful, thank you.
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    How Can I Identify Ions in a Mixture During a Practical Experiment?

    I am prepare for a practical experiment, this is a practical experiment aim to identify the anions and cations in the solution, and those ions are choosed from Pb, Ba, Ca, Cu,Fe2, Fe3 and CO3, Cl, PO, SO, NO3. where can i find the solubility in water for any ionic compound that can be formed...
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    Why Did Edison and Westinghouse Advocate Different Electricity Systems?

    thank you!
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    Why Did Edison and Westinghouse Advocate Different Electricity Systems?

    when a question is asking for reasons (except technological advantage) why each party held firmly to their own method for generating electricity, what should i consider of , and where can i find those reasons?
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    Measuring Simple Pendulum Acceleration: Tips for Accuracy and Reliability

    damn! i cannot understand it, what does between -1 and 1 mean
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    Measuring Simple Pendulum Acceleration: Tips for Accuracy and Reliability

    thank you for your help, i been confuse for whiles.
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    Measuring Simple Pendulum Acceleration: Tips for Accuracy and Reliability

    i think that will make it worse. so i measured the period for it complete ten oscillations and repeat it with different length of strings, due that both of them are the only variables in the equation. Even L and T are the only variables, but the angle should some how involved, would it? and...
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    Measuring Simple Pendulum Acceleration: Tips for Accuracy and Reliability

    For a simple pendulum practice with clamp, boss head and resort stand assembled, also a string attached to the end of clamp and a bob, then swings it and measure the time for it to complete a period. At the end use the information collected to calculate acceleration due to the gravity by the...
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    A small permutation question just don't get the right answer

    i think i got it, thanks
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    A small permutation question just don't get the right answer

    flip? can you give some explain please?
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    A small permutation question just don't get the right answer

    thanks for that, is that normally for all possible arrangement around a circle is (n-1)! so i think the answer should be 11!=39916800 but the right answer on back of the book is 19958400 which is half of 11!, i am confessed...
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    A small permutation question just don't get the right answer

    a small permutation question...just don't get the right answer question: 12 differently coloured beads are arranged around a necklace. how many different arrangements are possible? the right answer on back of the book is 19958400 not 11! don't know why may be the book was wrong, can anyone...
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