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  1. Q

    Is titrant known or unknown concentration?

    Nope Yes, but conventionally the conical flask contains the unknown solution and the burette delivers the known solution, hence you should do it this way.
  2. Q

    Potassium hydrogen carbonate acidic, basic or neutral salt?

    Poor explanation. What's with the hydrates? Shouldn't even be talking about that if we're looking at an aqueous reaction.
  3. Q

    Integrating question!??!?!

    Yup, then just do it normally with fundamental theroem.
  4. Q

    Integrating question!??!?!

    What's the derivative of e^x? What's the derivative of e^(ax+b)? Now, can you deduce what the integral of e^(3x-4) is?
  5. Q

    2014'ers Chit-Chat Thread

    Dropped like 5 marks on both my phys/chem test /50... :( More to come. Lost my 2nd/1st rankings respectively (probably)
  6. Q

    Circle Geometry

    Nope, your one is just long (even redundant). It's just what carrot said: angles subtended from same arc are equal. This only applies to circles so therefore ABCD must be cyclic. Also... IT IS a "circle" geo thereom so...
  7. Q

    Heat Of Combustion Questions

    Your confusion is not because chemistry is confusing, but because you lack understanding. Let me help you understand. Enthalpy change (ΔH) has to do with the energy content of products and reactants in a reaction (ΔH = energy of products - energy of reactants). Thus, it follows that this...
  8. Q

    Umm how do slip rings give an output current of AC??

    uh......... obviously OP is talking about a generator.
  9. Q

    Please Critique - A Belonging Creative.

    Just woke up and read this for brain food. Your expression feels very static and thus the protagonist's voice seems unauthentic (need more show and less tell!). Examples in your first paragraph: "I felt a wave of peace... I let myself surrender to it... Then I felt longing" Then I had much...
  10. Q

    If you can manage to explain why, I will be amazed

    why is sec theta > 1? I thought diagrams were just like... guidelines. Just because P is in first quadrant shouldn't mean there is a restriction on theta?
  11. Q

    Special Relativity Questions

    For the first one, the argument that an object can never reach the speed of light is based purely off of mass dilation (no textbook mentions mass energy equivalence; hence why i said ignore it). Also, the energy input is not consistent in both frames (explicitly said by my teacher who has a phd...
  12. Q

    Special Relativity Questions

    Hi, I need help understanding special relativity. Argument: An object approaching the speed of light will increase in mass. Thus, additional energy is required to speed up the object and as its mass approaches infinitely, the energy required approaches infinite. Hence, the object cannot reach...
  13. Q

    MCQ question - help

    I don't like how it says "It is then allowed to go back to it's original shape" which creates confusion.
  14. Q

    MCQ question - help

    eddy currents LOL good one hahaha
  15. Q

    Phosphorus tricholride

    Dispersion forces + dipole-dipole interactions
  16. Q

    question

    It's quite intuitive. Or use a calculator
  17. Q

    How to show exponential curve is concave up?

    A curve y is concave up if y" > 0, and concave down if y " < 0
  18. Q

    Test tommorow - urgent help needed!

    If you look at the back of the HSC periodic table, 1 mole of any gas at 101.3 kPa & 25deg occupies 24.47 L
  19. Q

    Not sure if space or motors....

    The magnet initially had 0 KE. It gained 0.72J in KE. But this must have come from GPE. However, it lost 0.98 J of GPE. Where did that extra 0.26 J go?
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