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  1. Suchal Riaz

    Mathematics: Post your doubts here!

    believe me add math is harder than P1 and M1 and i have an A* in that. i want hard questions to solve. i don't want to waste time in doing simple questions.
  2. Suchal Riaz

    Mathematics: Post your doubts here!

    i want before 2009 and i did those questions wrong because i wasn't in mood of doing anything. after question 3 my all questions are correct. and it was not a difficult paper. a good paper is one from which you can learn something. where the examiner can trick you, even for a moment. but P1 is...
  3. Suchal Riaz

    Mathematics: Post your doubts here!

    i have done after 2010. and i will do 2013 on the last day.
  4. Suchal Riaz

    Mathematics: Post your doubts here!

    asma tareen ZaqZainab usama321 Thought blocker please tell me which papers to do of math M1 and P1 before 2009 I want most tricky papers. not just-another-paper.
  5. Suchal Riaz

    Mathematics: Post your doubts here!

    actually i didn't to the complete question. when i looked at f(x) in completed-sqaure form it suddenly struck to me how it has to be done. and believe me i have done this question. maybe in mocks. but as i didn't do complete question and i had to go for dinner at that time, i told you wrong answer.
  6. Suchal Riaz

    Mathematics: Post your doubts here!

    that was supposed to give the correct answer. i don't know why it doesn't. maybe i need to check it. but i am not in mood. and did you get it by my explanation or someone else explained it to you?
  7. Suchal Riaz

    i shared it on fb

    i shared it on fb
  8. Suchal Riaz

    Physics: Post your doubts here!

    oops. i meant to say that the deflection will be small. if you work out the change in reading of volt meter as temperature is changed from 0 to 25 C it will be very small. if the change is small it means that the precision will be less.
  9. Suchal Riaz

    Physics: Post your doubts here!

    idk what you are talking about. i guess it's error? powers multiply: V=r² so dV/V = 2dr/R dR/R means fractional error in R(convention). like in R= 3 +- 0.1 R=3 and dR=0.1 so fractional error is 0.1/3=dR/R when multiplying or dividing the fractional error add and if the power multiply. such as ...
  10. Suchal Riaz

    Physics: Post your doubts here!

    from graph
  11. Suchal Riaz

    Mathematics: Post your doubts here!

    oh its so easy. i just left it because i thought you would be able to do it as its only one mark question look at it:
  12. Suchal Riaz

    Physics: Post your doubts here!

    its correct. the new wave will have phase difference of 60 degree. which means that 1/6 of the one wavelength. which means one big block of 10 small blocks. and the new amplitude will be √(2) of A. which is almost 0.7a
  13. Suchal Riaz

    Physics: Post your doubts here!

    okay so the range is from 1.5 to 3.5 V for 0-25 C Volt meter reads only upto one decimal place, 0.1 V. 0.1V/1V * 25 C = 2.5 C. it means that the temperature can be known close to 2.5 C of the real values. and secondly the circuit has another problem. the line is not straight. so same change for...
  14. Suchal Riaz

    Physics: Post your doubts here!

    change in U = Work done against weight = F.s = W.h=m.g.h
  15. Suchal Riaz

    Physics: Post your doubts here!

    -->Intensity is directly propotional to square of a it means if A in two times, I is four times -->Intensity is inversely proportional to area by first rule and second rule, E increase 4 times due to doubling of A but decreases 1/2 times due to halving of area. so E(new) = E*4/2=2E
  16. Suchal Riaz

    Mathematics: Post your doubts here!

    here's a joke :D
  17. Suchal Riaz

    Mathematics: Post your doubts here!

    sin is a function. this is what you do always:
  18. Suchal Riaz

    Mathematics: Post your doubts here!

    \ f,h,g are functions not variables
  19. Suchal Riaz

    Mathematics: Post your doubts here!

    lol you are a smart girl you can figure out rest of it. it's just one mark question. it will take less than 20 sec to do but i don't have f inverse
  20. Suchal Riaz

    Physics: Post your doubts here!

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