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    Changing engineering streams? Biomed vs chemical

    hi, I enrolled as a biomed stream student, but after looking at the work opportunities/salary and other things I'm thinking about changing to chemical engineering - I do like both, but biomed sounds a tad more fun... How do I change streams/is there a deadline/ If I change later on will I need...
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    Main round/late round

    If I get an offer in the main round, accept it and then enrol, can I get an offer in the late round and withdraw the other one?
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    raw mark

    worst case scenario, raw mark 56, what band so you guys think?
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    copy of the exam

    does anyone have a blank copy they're willing to upload?
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    2 people rank 1st

    How do they align marks if 2 people ranked 1st internally, and say 1 did well in the exam and the other badly?
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    Raw mark

    If I got a raw mark of 95 in the trial, what do you think my hsc mark would be, after the whole moderation process?
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    Back emf in generators?

    Okay so I was under the impression there is no back emf in a generator But my class notes say that a DC generator has no back emf AC generator has back emf due to eddy currents How can this be?
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    calibration curve

    a calibration is just a line of best fit isn't it?
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    ppm question

    a bottle of cream has 8.20ppm aluminium. The bottle contains 9 g of cream determine the mass of al in the cream please show all working thankyou so much :D
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    Are my calculations of g correct?- Projectile Motion

    Hey, we've done an investigation in physics, and I'd just like to make sure I'm calculating correctly cause my values of g are totally whacked out, its projectile motion off the edge of a table onto the floor table height :0.75m distance travelled: 0.19m t: 0.2, 0.3, 0.4 seconds so using...
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