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Recent content by xxxt

  1. xxxt

    Physics: Post your doubts here!

    There is a point on the line joining the centers of the earth and the moon where their combined gravitational field strength is zero.is this point closer to the earth or to the moon? calculate how far it is from the center of the earth.....( mass of the earth = 6.0*10^24)(mass the moon=...
  2. xxxt

    As-Level English Language 8693/12 (HELP REQUIRED)

    you should write at least about 700 words.....but make sure that you have commented on the most important styles used by the writer...:)
  3. xxxt

    Mathematics: Post your doubts here!

    The function f : x → 4 − 3 sin x is defined for the domain 0 ≤ x ≤ 2p. (i) Solve the equation f(x) = 2. [3] (ii) Sketch the graph of y = f(x). [2] (iii) Find the set of values of k for which the equation f(x) = k has no solution. [2] HOW DO YOU DO PART 3?o_O
  4. xxxt

    Physics: Post your doubts here!

    Two springs X and Y have spring constants k and 2k respectively. Spring X is stretched by a force F and spring Y is stretched by a force 2F. Each spring obeys Hooke’s law during the extension. The work done in stretching spring X is WX and the work done in stretching spring Y is WY. What is the...
  5. xxxt

    Physics: Post your doubts here!

    does any one know the explanation for the gap in the stress-strain graph of a polythene?
  6. xxxt

    economics multiple choice paper

    can anyone give the link for winter 2005 mark scheme? thanks:)
  7. xxxt

    economics multiple choice paper

    can anyone explain why the answer for question 9 is b? http://www.xtremepapers.com/papers/CIE/Cambridge%20IGCSE/Economics%20(0455)/0455_s06_qp_1.pdf
  8. xxxt

    economics multiple choice paper

    its because the cost of production increases (because of the advertising cost) and increase in cost of production leads to decrease in supply
  9. xxxt

    economics multiple choice paper

    alright thanks!
  10. xxxt

    economics multiple choice paper

    does any one know why the answer for q 29 is B http://www.xtremepapers.com/papers/CIE/Cambridge%20IGCSE/Economics%20(0455)/0455_s04_qp_1.pdf
  11. xxxt

    Physics, Chemistry and Biology: Post your doubts here!

    metals are on the left side of the periodic table non metals are on the right side of the table you can not exactly say where acids and alkalies lie (it depends wether u are considering elements or compounds) but metalic elements usually form alkali compounds while non metalic elements form...
  12. xxxt

    Physics, Chemistry and Biology: Post your doubts here!

    b/c diagram 2 shows a single bond which may represent hydrgen n diagram 3 shows double bond which may represent oxygen but diagram 1 shows no bond which means dat its a noble gas and water can never be made of noble gas so the answer is 2 and 3
  13. xxxt

    Physics, Chemistry and Biology: Post your doubts here!

    pipate is for fixed volume eg 25cm3 burette is for accurate measurement of a certain small volume in ml liike the one used in titration measuring cylinder is for bigger volumes depending on its capacity.
  14. xxxt

    economics multiple choice paper

    thank u
  15. xxxt

    economics multiple choice paper

    can anyone please post a link for 2005 paper mark scheme? Thanks
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