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  1. Saad Mughal

    Biology; Chemistry; Physics: Post your doubts here!

    :)
  2. Saad Mughal

    Maths, Addmaths and Statistics: Post your doubts here!

    I'm getting the same answer, k = 1/4. :confused:
  3. Saad Mughal

    Maths, Addmaths and Statistics: Post your doubts here!

    Have you rounded the values to 3 sig. fig.? I attempted a question like this in the mocks, 1 or 2 points were off (with a larger scale and as accurate as possible) so then I used sig. fig. values such as 10.2, 20.1 and it worked like a charm. Questions like this are very annoying. o_O
  4. Saad Mughal

    Maths, Addmaths and Statistics: Post your doubts here!

  5. Saad Mughal

    Maths, Addmaths and Statistics: Post your doubts here!

    Solu: Let cost of radio=x Cost of Tv=6x+20 4220=6x+20 6x=4200 x=700 Option C is the answer.
  6. Saad Mughal

    CHEMISTRY QUESTION

    Don't mention it :)
  7. Saad Mughal

    CHEMISTRY QUESTION

    Argon is an inert gas, it has a complete outer-most shell and hence it does not react since it is already stable. Nitrogen on the other hand, exists as N2 in its gaseous form which has a trivalent bond which makes it relatively unreactive but still it is not a inert gas and reacts to form...
  8. Saad Mughal

    Physics Help

    ;)
  9. Saad Mughal

    Physics Help

    Electromotive force is the work done per unit charge in driving charge around a complete circuit (in other words it is the energy converted from all other forms to electrical energy); it is measured by connecting the voltmeter in series with the circuit. Potential difference is the work done per...
  10. Saad Mughal

    Biology; Chemistry; Physics: Post your doubts here!

    For Metals, resistance increases as temperature increases. You're correct, if a larger current is passed through the wire, more energy will be dissipated in the form of heat energy and hence the temperature will increase which will bring about a change in the resistance. Hope that helps :)
  11. Saad Mughal

    Physics Help

    I figured these out from a reference book but Thanks anyway! :) Although, I read that heat is transferred to buildings through convection currents and from the buildings through radiation and conduction (floor,ceiling,windows).
  12. Saad Mughal

    Chemistry 5070 O'level Notes Compiled

    K.
  13. Saad Mughal

    Chemistry 5070 O'level Notes Compiled

    I never said you claimed possession. :P The fact of the matter is, you shared what is already up here. No use. :P
  14. Saad Mughal

    Physics Help

    I read in the Complete physics IGCSE book that water expands 7 times as much as steel and air expands 16 times as much as water but that won't suffice because that is not the relative magnitude of SOLID, LIQUIDS and GASES.
  15. Saad Mughal

    Chemistry 5070 O'level Notes Compiled

    You decide to share the notes that I found on this website and shared with you? Very... Innovative. :p
  16. Saad Mughal

    Physics Help

    Hello Everyone! Hope you are having a good time studying :p (unlike me) o_O. I needed help on the following contents of the syllabus: describe how heat is transferred to or from buildings and to or from a room. describe the relative order of magnitude of the expansion of solids, liquids and...
  17. Saad Mughal

    Chemistry 5070 O'level Notes Compiled

    No need for the sorry. :p I never said you were showing attitude either. :p
  18. Saad Mughal

    Chemistry 5070 O'level Notes Compiled

    ^Don't want to be rude but you don't know the story behind my comment. :P In short, we're friends from school; I'm just pulling his leg.
  19. Saad Mughal

    Chemistry 5070 O'level Notes Compiled

    These have already been uploaded. Just go to O'levels Note Center. They are ALL there.
  20. Saad Mughal

    Ok.

    Ok.
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