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  1. Abu mota

    for chemistry paper 3

    all u need to know is the use of radioactive substances: In industry: 1. strontium-90 used maintain the thickness of metals and papers 2. uranium-235 used to generate electricity in nuclear powerstations In medicine: 1. strontium-90 used to treat skin cancer 2. cobalt-60 used to treat...
  2. Abu mota

    Paper 6 - post your doubts are

    i dont understand how do u draw the resistors, if they are lines, i dont know how to convert the wires to resistors.
  3. Abu mota

    Paper 6 - post your doubts are

    oct/november 2005 question 2, i cant draw a circuit and i usually get this question wrong all of the time so teach me the principle too plz and ty
  4. Abu mota

    Physics paper 31 , (a death call)

    That's your reply???? Lol sorry but if u dont understand what I just said you are either stupid or u don't understand english, I will try to make it simpler, when you have a thin tube any small change can be noticed because the liquid will rise high for every small change, and i didn't really...
  5. Abu mota

    Physics paper 31 , (a death call)

    see the syllabus and u need all of the topics for paper 3 :D but organic chemistry is the most important then moles then rates of reaction and the rest are a little less important :D
  6. Abu mota

    Physics paper 31 , (a death call)

    Lol just like as the one above u said the tube is thin so any small change can be noticed ;) and it has nothing to do with temperature because temperature just affects rate and evaporation can happen at any temperature. Ty
  7. Abu mota

    Physics paper 31 , (a death call)

    no it doesnt, it just proves that his answer is right, but he didnt say why is evaporation wrong ;)
  8. Abu mota

    Physics paper 31 , (a death call)

    this takes days, but i dont think the experiment took a day because the glass would have been broken by then. i think that both are right but evaporation seems to make more sense to me.
  9. Abu mota

    Physics paper 31 , (a death call)

    im worried too cuz if i got the evaporation wrong i will lose 5 marks right?, i think that the main problem is that i cant stop thinking about it, sometimes i think that evaporation is 100% right and sometimes i think that expansion is 100% right. and this makes me unable to study chemistry :(...
  10. Abu mota

    Physics paper 31 , (a death call)

    IT ISNOT WRONG, the glass expanding is impossible because expansion of solids cant be noticed!!!!!!!!! i dont know why u guys say the expansion of the flask, it just doesnt make sense, also why is evaporation wrong, evaporation can happen at any temperature and rapidly too, so think about it it...
  11. Abu mota

    which is harder, Edexcel or CIE?

    :p :unsure:
  12. Abu mota

    *** was that(physics paper 3)

    here is what i got wrong if anyone is interested :p The maximum speed ( 3 marks) did it totally wrong i didnt even use the graph i used a mathematics equation i learnt this year :( it was 13.1 lol beta movement ( 1 mark) i didnt know that we have to say that it curved i just thought they wanted...
  13. Abu mota

    Chemistry Doubts: IGCSE Paper 3

    I don't understand the hydrogen fuel cell, I think that the main problem is that they never adk about it and I don't know how will they ask us or what I should learn about them.
  14. Abu mota

    Physics paper 31 , (a death call)

    i was going to say that too, anyways gl in the next exam ;)
  15. Abu mota

    i did my physics paper 32 in PENCIL

    the rules said only in black or dark blue pen so i think u will lose some marks on it but imnot sure i think it depends on the one who marks
  16. Abu mota

    Physics paper 31 , (a death call)

    yea and also the difference in surface area is what made one to become higher than the other
  17. Abu mota

    Physics paper 31 , (a death call)

    he didnt say that the difference was big :p and he didnt say for how long did he leave the experiment and so there might be enough time for lots of evaporation to happen :p
  18. Abu mota

    Physics paper 31 , (a death call)

    i dont really know srry
  19. Abu mota

    Physics paper 31 , (a death call)

    i guess u can understand the question in different ways, maybe u understood after the experiment and i understood during the experiment, i dont know which is correct though
  20. Abu mota

    Physics paper 31 , (a death call)

    bro they were only 2 marks because 2 marks for one for expansion and 2 marks for one for the expansion of water and one mark for why one is bigger than the other and until now u didnt convince me why evaporation is wrong and ur answer is the only right answer. and i will keep telling u that...
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