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  1. daredevil

    Urdu A notes contribution

    Heyy people! I have made this thread to compile all notes for Urdu as first language bcuz i cudn't find any such thread on xpf and preparing urdu is REAAAL hard :/ soooo.... lets start contributing the notes u have or any suggestions or info u have regarding the urdu paper... starting now... :)
  2. daredevil

    Useful stuff compiled ( For O-level )

    I'm having the same problem!! :( :sick:
  3. daredevil

    Pakistan Studies, Islamiyat and Urdu: Post your doubts here!

    yeah i know the feeling like suddenly u go all blank and feel like screaming but then i literally applied a technique that is quite a cliche: i took deep breaths, closed my eyes, recited durud Sharif and then read the question again and felt like dancing bcuz i knew the answer so well .. lolx :P...
  4. daredevil

    Biology; Chemistry; Physics: Post your doubts here!

    Sulphates: barium, silver, lead and calcium sulphates are insoluble. (Calcium Sulphate is SPARINGLY soluble) otherwise all are soluble. Nitraates: all soluble Carbonates: all INSOLUBLE excpt group 1 metals' carbonates and ammonium carbonate. In organic chem u need to learn the reactions... b/c...
  5. daredevil

    Biology; Chemistry; Physics: Post your doubts here!

    there is no set sylabus for atp but u can just practice past papers, revise your formulae and i have attactched these notes if they can help.... :) also search this thread i think i saw Important questions for physics ATP here .... iam not sure if it was in this thread or some other one...
  6. daredevil

    Biology; Chemistry; Physics: Post your doubts here!

    np cristy ;)
  7. daredevil

    Biology; Chemistry; Physics: Post your doubts here!

    Oh it isn't mentioned? i didn't c it... but to b on the safe side i wud suggest that u do it ... its not that difficult either. :whistle:
  8. daredevil

    Biology; Chemistry; Physics: Post your doubts here!

    A force can stop a body in motion. A force can cause an object at rest to move. A force may cause a moving object to change its speed... i hope this is the answer required...
  9. daredevil

    Biology; Chemistry; Physics: Post your doubts here!

    A body is following the principle of momments if the body is in equilibrioum or when the sum of upward forces are equal to the sum of downwards forces (or sum of clockwise moments is equal to sum of anticlockwise moments)
  10. daredevil

    Biology; Chemistry; Physics: Post your doubts here!

    it is approximately 1/3 .. if you immerse it too much you won't be able to red the scale and take the reading.... and if it is immersed too little it will not be accurate and you can't be sure of externl factors affecting the temperature.
  11. daredevil

    Biology; Chemistry; Physics: Post your doubts here!

    I don't have a soft copy so i can't give them to u.... sorry.... but i can refer some books which might be helpful: Physics for You; Explaining Physics; World of Physics.... there might be unnecessary details in these books so make sure you hve the syllabus un front of you and check out all the...
  12. daredevil

    Biology; Chemistry; Physics: Post your doubts here!

    actually wen u read the answer to how u automatically get the answer to why 2 .... for making measuring instrument we nee to have a standard or a scale for it (eg. a vernier caliper, metre rule, ammeter, etc.) same is the case w/ a thermometer .... bcuz we need it to measure temperatures of...
  13. daredevil

    Biology; Chemistry; Physics: Post your doubts here!

    thnx for the warning but i just prepared this topic today and i said that IN MOST CASES (i may have written mostly but watever) it impurities do not affect the temperature of the steam just above the water. i didn't tell him to used swamp water :P i just said that minor impurities will not afect...
  14. daredevil

    Attendance Register

    Present :sneaky:
  15. daredevil

    Biology; Chemistry; Physics: Post your doubts here!

    see u know that u need to have a scale of at least 0 - 100 *C and all the other temperatures will come within those points.... and u also know that mercury exapands in direct proportion (or it has a linear expansion) with temperature which means it will expand the same length for every...
  16. daredevil

    Biology; Chemistry; Physics: Post your doubts here!

    is this intereference included in cie o levels?
  17. daredevil

    Biology; Chemistry; Physics: Post your doubts here!

    diodes (symbols) and semiconductor diode's working are included .... other than that tranistors are not included but capacitors are included in the chapter Advanced Electronics.
  18. daredevil

    Maths, Addmaths and Statistics: Post your doubts here!

    oh thnku soooo much1! :)
  19. daredevil

    Biology; Chemistry; Physics: Post your doubts here!

    oh ok..... thanks! :)
  20. daredevil

    Biology; Chemistry; Physics: Post your doubts here!

    Q.1 what is the purpose of a ratchet? Q. 2 why is there a 20*C mark on the measuring cylinder? (i read this question in some notes and i don't even if there is a mark so obv i didn't know the answer to this question.)
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