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  1. L

    Physical quantities and units

    Walaikumusalam wa rahmatullahi wa barakatuhu when 3 or more vectors are added together, the same principes are applied as a closed triangle one, provided that the vectors are coplanar(all in the same plane) . the vector triangle then forms a vector polygon. to subtract the vectors, reverse the...
  2. L

    precision and Accuracy

    Walaikumusalam precision:- it is the values which areclose together ex. measuement of a table; 3.55 m or 3.50m or 3. 58m...these all measurements are close eash other so we say that they are precise. the more u repeat the more precise value u get. accuracy:- it is the measurement which is very...
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    PLease explain me abt 3 types of glycoprotein!!

    Walaikumussalam wa rahmatullahi wa barakatuh about the 'fluid mosaic' model :- fluid mosaic model is how a plasma(cell) membrane is structured the term 'fluid' refer to the movement (fluidity) of the protein molecules and phospholipid bilayer. the term 'mosaic' refer to the ararngement of the...
  4. L

    just want to know!! :)

    i dont wanna go to pakistan!! i was just saying that there are some collages in world. nevermind....i'm doing my A levels first sorry to bother u guys.
  5. L

    just want to know!! :)

    but i hav heard of some collages that take you after IGCSE and their course is for 7 years instead of 5! this is because they include 2 years of a levels in it too. btw umar, my teacher told me that there was one student who went to pakistan(medical college) after IGCSE.
  6. L

    just want to know!! :)

    hello guys! i took my IGCSE exam this year and i just want to know a medical college that takes after o levels so if anyone knows any college please let me know. :)
  7. L

    IS As LEVELS HARD??

    i am a student who gave IGCSE exams this year and i'm planning to give my As levels next year for physics, chemistry and biology. I really need to know whether As level is hard or not so please if someone can help!
  8. L

    chemistry paper3 (AFTER EXAM DISCUSSION)

    i wrote salt as a compound and its use is to make soap.....wat did you write??
  9. L

    need bio paper 1

    thank you sooo much Ivo!!
  10. L

    please help in chem

    a)i) volume of oxygen reacted : 10 * 6.5 =65 so the volume unreacted will be : 100(total volume of o2) - 65 =35 cm3 volume of 6.5 moles of O2 was 65 cm3 so volume of 4 moles of CO2 will be 40 cm3 (we cross-multiply) a)ii) incomplete combustion means not enogh oxygen so alkane...
  11. L

    RIDDLES!!!!

    @arif1310: hmmm.... friday :D @thabomanqoba: sure! @mishi: juice with a fly in it?! LOL :D
  12. L

    Physics paper1: the discussion.

    and what abt the planet Q one?? i did (A) ....mass=40 and weight=200
  13. L

    'Zohaib Sherazi' promoted to Forum Moderator!

    congrats zohaib sherazi!!!! :D :D
  14. L

    URGENT help in bio

    there are 3 types of bacterias:- 1) nitrogen-fixing bacteria which are found in root nodules of leguminous plants and are used to convert nitrogen gas into compounds of ammonia 2) nitrifying bacteria are used to convert compound of ammonia into nitrates/nitrites which are used by the plants for...
  15. L

    BIO paper 3 help plllllllllzz!

    first we add microorganisms which can be bacteria or fungi in a large, sterile fermenter. the temperature must be 26oC and the pH much be between 5-6. feedstock(nutrients) should be added in the fermenter along with air(oxygen). allow the microorganisms to reproduce and make enzymes which can be...
  16. L

    3 word game

    with some ketchup
  17. L

    IGCSE Biology Paper6

    it was bcause of the competition. dish C had 10 seedling whereas dish B had 20 so there was more competition in dish B for water and oxygen so they didnt germinate well.
  18. L

    Maths Paper 4 Discussion

    for the vectors i think it is -1/2 c + 1/2v 1/2c + 1/2 v and..... i think -1/2 c + 1/6v (smthing like tht)
  19. L

    3 word game

    like a hippo...
  20. L

    maths tomorrow!!!

    ok...we r having maths paper 4 tomorrow and then we will be done with maths... :D i hope its not hard.....what do you think???
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