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  1. Mahnoorfatima

    Biology; Chemistry; Physics: Post your doubts here!

    I probably should.:(
  2. Mahnoorfatima

    Biology; Chemistry; Physics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20O%20Level/Physics%20(5054)/5054_s12_qp_22.pdf Qs 6, c part ii. Shouldn't it be half the wavelength of one wave whereas ms says something else cause by calculation the distance is 0.5 ie 5?
  3. Mahnoorfatima

    Biology; Chemistry; Physics: Post your doubts here!

    Yeah but why 10^-3???
  4. Mahnoorfatima

    Biology; Chemistry; Physics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20O%20Level/Physics%20(5054)/5054_w10_qp_22.pdf Oh wow! Thanks awesome 12! Okay so I'm talking about qs 5 part a. And the b part. How come the frequency is the same for both of the waves?
  5. Mahnoorfatima

    Biology; Chemistry; Physics: Post your doubts here!

    There's this question of o/n 2010 paper 22 qs 5of oscilloscope .. Can anybody check it out please? I don't know how to post the link on my iPad.. My answer's 1.25 whereas in ms it's 1250. Anyone ? Please?
  6. Mahnoorfatima

    Biology; Chemistry; Physics: Post your doubts here!

    There's this question that describe a method to determine whether a piece of metal emits gamma rays. Do we use the Wilson could chamber thingy or the gm tube by measuring the count rate by placing a paper then aluminum and then lead infront of the detector?
  7. Mahnoorfatima

    Biology; Chemistry; Physics: Post your doubts here!

    How is the ratio equal? When it says 2dm3 reacts with 1dm3 ? It should be 2:1 then no?
  8. Mahnoorfatima

    Biology; Chemistry; Physics: Post your doubts here!

    Chemistry November 2009 qp12 qs 12. Why is it 0? The ratio being 2:1 the answer should be b? Anyone?
  9. Mahnoorfatima

    Biology; Chemistry; Physics: Post your doubts here!

    And do all metal nitrates have no reaction with dilute acids?
  10. Mahnoorfatima

    Biology; Chemistry; Physics: Post your doubts here!

    Simple! Look you know that the ratio between volume of gases and moles of gases is exactly the same. Then they've already told you that the volume of the total product is 70 so count the number of moles on the product side and you'll notice that 3+4 is 7,thus c is the answer as the ratio is 1:7
  11. Mahnoorfatima

    Biology; Chemistry; Physics: Post your doubts here!

    Can you please answer my question as we'll? Maj June 12 qp 12 Mcq 40.?
  12. Mahnoorfatima

    Biology; Chemistry; Physics: Post your doubts here!

    The answers c?
  13. Mahnoorfatima

    Biology; Chemistry; Physics: Post your doubts here!

    May June 12 paper 12 question 40????
  14. Mahnoorfatima

    Biology; Chemistry; Physics: Post your doubts here!

    Nope 12. The incorrect phenotype one...
  15. Mahnoorfatima

    Biology; Chemistry; Physics: Post your doubts here!

    Plus ... The question 38 wala... I Know I'm bothering you but.. :/
  16. Mahnoorfatima

    Biology; Chemistry; Physics: Post your doubts here!

    Yeah yeah okay. But if the egg is released on the last day of the sperm like the 2nd day so fertilization will occur and if it's released on the third day so the sperm would die and no fertilization would occur right?
  17. Mahnoorfatima

    Biology; Chemistry; Physics: Post your doubts here!

    Anyone who knows a tricky paper 1 and paper 2?? Except from oct nov 13 and mayjune 12 I've done those....
  18. Mahnoorfatima

    Biology; Chemistry; Physics: Post your doubts here!

    But in 38 it should be A as aa is not possible if you do the crosses... Plus I was asking about 11 .. I wrote 22 . It's 11 There's another question . I don't remember the year but it was something relating to the sperms living in the ovum for 7 days. If you remember please explain that as...
  19. Mahnoorfatima

    Biology; Chemistry; Physics: Post your doubts here!

    Yeeeeeeep
  20. Mahnoorfatima

    Biology; Chemistry; Physics: Post your doubts here!

    Koi to bata do yaaar!
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