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    casio: stored numbers keep changing!?

    My casio fx-82AU Plus calculator's stored numbers keep changing somehow and I don't know why... Letters A-D are all fine but when I store numbers into X,Y,M and come back a bit later, the numbers change! How can I fix this/ what am I doing wrong?
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    Table borders?

    If I list points in a column for a comparison question in the HSC, is it necessary to outline a border around it to make it a formal table? I've heard that some schools dock marks for not doing this.. just wondering if it's the same for the HSC.
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    Engineering for a shy guy?

    I'm a mildly shy person and I'm very interested in engineering but I've heard that it requires GOOD communication skills which I don't really have. I'm able to talk to people but I get a bit flustered at times... would I die if I pursue a career in engineering?
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    Power packs

    I came across this question: Is there any significance in the colours of a DC/AC terminal on a power pack? (ie 2 colours differentiating positive and negative terminals for DC whereas the AC terminals only have a single colour for both)
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    neutrons included in Rutherford+Bohr model?

    Just to clarify, neutrons aren't included in Rutherford's model of the atom since he suggested the existence of the neutron after he released his model and they weren't discovered until later? Also, are neutrons included in Bohr's model?
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    co-60 agriculture or industry

    Would cobalt-60 be classified as an industrial or agricultural radioisotope when used in food irradiation?
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    metal reactivity help

    just a simple multiple choice question.. can anyone explain why I got this wrong? https://imgur.com/cUlSWdu
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    Using short answer texts as a back up related?

    In the HSC, if they ask for a second related text, are we allowed to use the texts in the short answers as a last resort?
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    forward slash for enjambment in quote?

    When quoting texts, is it necessary to include a forward slash to signify when the author uses enjambment in a poem or play? ie "virtue be as wax/And melt in her own flame"
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    retell vs providing own interpretation

    We're supposed to avoid retell wherever we can in an essay, so how would you go about stating your own interpretation of a text if this is not allowed- does backing it up with analysis sort of negate the retell?
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    hopeless teacher

    my 4u teacher is terrible at teaching... would it be possible to get a decent mark in the hsc if i completely flop all questions relating to mechanics? I'm okay with all the other topics, it's just that I can't seem to understand most mechanics problems.
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    analyse vs explain?

    I have an assignment where there is a question which specifically states to ANALYSE the technical and environmental difficulties in membrane cells.. I've looked up the definitions of these words from the nesa glossary but I'm still confused as to what the difference is between them. - both...
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    equation for sulfur dioxide to sulfur trioxide

    Which equation is more correct?
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    how long should a quote be?

    so I know that a quote needs to be effectively chosen such that what I'm trying to say is seen through the quote and quotes aren't necessarily a standard length but I'm having trouble cutting down... ie in 'the Great Gatsby' Fitzgerald likes to have long flowing sentences with lots of...
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    hsc 2016 probability question

    Could someone explain this? I had a look at the answers and don't entirely understand it.. especially part 2. from 11 f) A darts player calculates that when she aims for the bullseye the probability of 3/5 her hitting the bullseye is with each throw. (i) Find the probability that she hits...
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    technique for when a word has the same ending?

    Gosh I'm bad at identifying language techniques... I'm looking for techniques in "a most dauntless, voiceless fortitude". I've been looking around and the closest I can find is superlative but I'm not really sure that fits the bill.
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    would this be repetition or something else?

    for repetition, does the repeated word need to be exactly the same or can it be a 'stem' of the original word. ie change.. and changing etc or would it be a different technique altogether?
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    formal technique for simplistic words/phrases?

    Just wondering, is there an actual technique when a composer uses simplistic expression instead of flowery language?
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    mcq help

    A satellite circles the earth in an orbit of radius 6,600 km every 90 minutes. The satellite’s average speed is: A 12.5 km s-1 B 7.7 km s-1 C 3.9 km s-1 D 10.9 km s-1 I used...
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