Recent content by randomnessss

  1. R

    Experienced Chemistry Tutor (Cabramatta)

    If you're a Year 12 student who has felt that the first module (Production of Materials) has been difficult or that you feel that you need concepts to be re-taught to you, please feel free to contact me for group tutoring sessions with your friends in Cabramatta during the summer holidays...
  2. R

    Experienced Chemistry Tutor (Cabramatta)

    *bump* Check, like and follow the Facebook page for more offers (coming in the next few days). If you want to start the Year 12 Chemistry course fresh, a special offer is available for summer holiday classes. Link: https://www.facebook.com/chemistry.tuition
  3. R

    How do you "self-learn?"

    I agree with drogonski's and coffee_'s advice however, if possible, you should also consider learning things in a group setting with your friends if you're comfortable with the idea. For example, you could delegate dot-points and get each other to explain it to each other. By doing that, you...
  4. R

    Why are iron artefacts stored in basic solutions?

    Iron artefacts are normally stored in highly alkaline solutions (pH>10) so that it prevents further corrosion. This is because the chloride ions present in the iron hydroxy chlorides (e.g. Fe(OH)Cl) can react with water to form HCl and thus a basic medium would be most appropriate as it prevents...
  5. R

    Experienced Chemistry Tutor (Cabramatta)

    Hi everyone! I'm advertising my services in chemistry tuition to anyone who is interested in improving in Chemistry. I am currently a third year Education/Science student at the University of Sydney. I love Chemistry and Science in general as it helps us have a better understanding of the...
  6. R

    3 Unit Maths HSC Exam Revision

    \begin{align*}y'&=\frac{2x}{x^{2}+e} \\y &= ln{(x^{2}+e)} + C \\ \text{When }x=0\text{ and }y=2, \\2&=ln(0^{2}+e)+C \\2&=ln(e)+C \\2&=1+C \\C&=1\end{align*} \\\therefore {y = ln{(x^{2}+e)} + 1}
  7. R

    3 Unit Maths HSC Exam Revision

    \begin{align*}2^{x+1}&=3^{x-1} \\2\times 2^{x}&= \frac{1}{3}\times 3^{x} \\6\times 2^{x}&=3^{x} \\\frac{3^{x}}{2^{x}}&=6 \\ln{\frac{3^{x}}{2^{x}}}&= ln{6} \\ln{3^{x}}-ln{2^{x}}&=ln{6} \\xln3 - xln2 &= ln6 \\x(ln3 -ln2)&=ln6 \\x&=\frac{ln6}{ln3 -ln2} \end{align*} QUESTION: \text{Find }\int...
  8. R

    Sydney Grammar Trial Papers

    Ah okay, thanks dude. :)
  9. R

    Sydney Grammar Trial Papers

    Oh okay. Could you please suggest any trial exams that are difficult/challenging?
  10. R

    Sydney Grammar Trial Papers

    Hey, I was wondering if anyone had digital copies (i.e. PDFs or word documents) of past Sydney Grammar School trials for the 2U course. If so, could you please give me a copy? Thanks in advance.
  11. R

    Which of the following is NOT a molecule ?

    Helium is a monatomic molecule (i.e. a molecule that consists of one atom only).
  12. R

    Year 8 maths trial papers

    Here's a link that might help. Year 8
  13. R

    needs some background knowledge ><

    \begin{align*} {\frac{\mathrm{d} }{\mathrm{d} x}}\left(e^{\sqrt{x}} \right)&= \frac{e^{\sqrt{x}}}{2x^\frac{1}{2}} \\ \int \frac{e^{\sqrt{x}}}{\sqrt{x}}dx &= 2 \int\frac{e^{\sqrt{x}}}{2\sqrt{x}}dx \\ &= 2e^{\sqrt{x}} +C \end{align*}
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