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Recent content by Muhammad Amer

  1. Muhammad Amer

    Cambridge International AS and A Level Chemistry Coursebook with CD-ROM (PDF)

    Here you go: Cambridge International AS and A Level Physics Coursebook Sadly, though, this is a previous edition of the book. So, you won't find the new 2016 syllabus material (Band theory, Doppler effect, and Particle physics) inside.
  2. Muhammad Amer

    Cambridge International AS and A Level Chemistry Coursebook with CD-ROM (PDF)

    I posted this on the "Chemistry: Post your doubts here!" first, but I decided to create a thread so more users would notice it. I've been looking for a PDF version of this book for ages, and I found it. It can be downloaded as a torrent from here. I believe the CD has been uploaded here...
  3. Muhammad Amer

    Chemistry: Post your doubts here!

    I believe the CD has been uploaded here before, so you could find it by using the search bar in xtremepapers. If not, here is a torrent link for the CD.
  4. Muhammad Amer

    Chemistry: Post your doubts here!

    I don't know if it has been uploaded here before, but I've been looking for a PDF version of this book for ages, and I found it. It can be downloaded from here. You need a torrent down-loader to download it, μtorrent should be fine.
  5. Muhammad Amer

    Physics: Post your doubts here!

    Probably Cambridge International AS and A Level Physics Coursebook with CD-ROM
  6. Muhammad Amer

    Physics: Post your doubts here!

    Can anyone help me with this? "A power supply of e.m.f. E and internal resistance R is connected to a 10 kΩ resistor. The current drawn from the power supply is 0.91 mA. A voltmeter of internal resistance 10 kΩ is connected in parallel with the 10 kΩ resistor, and reads 8.3 V. Calculate the...
  7. Muhammad Amer

    Mathematics: Post your doubts here!

    You're Welcome!
  8. Muhammad Amer

    Mathematics: Post your doubts here!

    Q 5: To get the perimeter, you must find all the external lengths of the plate For the arc, l=rθ the length of an arc is equal to the radius of the circle multiplied by the angle opposite to the arc in radians. Let CB=X & OC=Y Using basic trigonometric knowledge, sinθ=Y/r so Y=rsinθ also...
  9. Muhammad Amer

    Mathematics: Post your doubts here!

    While I, myself, am waiting for help, I might as well help you DDanielAWE@ As for Q 4 (ii): to get the expression for f(x), you will first need to integrate on f'(x), so f(x)=x^2-6x+c Now, you know this is a parabola and its stationary point is a minimum because the coefficient of x^2 is...
  10. Muhammad Amer

    Mathematics: Post your doubts here!

    Greetings, Yes, I'm stuck with question 8 in Exercise 16B in Pure Mathematics 2 & 3. I'd be very thankful if somebody helped me out with it.
  11. Muhammad Amer

    XtremePapers Contest 2012-2013 Winners (Finally!)

    My congratulations! But first, might I inquire to ask, what do these winners actually win?
  12. Muhammad Amer

    About the lock and key model of enzyme

    You are trying to apply the concept of "A key that unlocks many doors is a master key, but a lock that is opened by many keys is a bad lock," yet this is not how the model is described. Perhaps that is why this model is not as appreciated as the induced fit model; it makes much more sense for...
  13. Muhammad Amer

    AS Biology, a bit confused

    Two opposing forces control the movement of fluid between the capillaries and the surrounding tissues: Blood pressure tends to drive fluid out of capillaries, and the presence of blood proteins tends to pull fluid back (osmotic pressure). Now, many blood proteins are too large to pass through...
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