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  1. queen of the legend

    Physics: Post your doubts here!

    june, my last post has the qp and ms
  2. queen of the legend

    Physics: Post your doubts here!

  3. queen of the legend

    Physics: Post your doubts here!

    please explain : question 4c ( 22/2010)
  4. queen of the legend

    Physics: Post your doubts here!

    you did not specify the question ! is it about principle of superposition ?? if so : principle of superposition of waves states that when two waves superimpose or overlap then the resultant displacement is sum of individual displacements.
  5. queen of the legend

    Physics: Post your doubts here!

    if the ball is traveling against the gravitational pull then its acceleration will be negative that is obvious! but if you throw the ball from a height then g= + 9.8 ms^2 :)
  6. queen of the legend

    Physics: Post your doubts here!

    in the first part let us consider b as a junction so current entering B are ( I1 and I3) = current leaving junction B = I2 so I1+I3=I2 second one , loop HBFGH ....will be E1=I1R1+I1r1+I2R2 Easy for the next one you have to remember that the cell though which current LEAVES...
  7. queen of the legend

    thank you ! eid mubarak to you as well. May Allah bless you

    thank you ! eid mubarak to you as well. May Allah bless you
  8. queen of the legend

    Physics: Post your doubts here!

    well if you do think uncertainty in paper 2 is easy then paper 3 would be easy too .......anyhow uncertainty of a device is least value it can measure ....welcome for ur understanding!! :)
  9. queen of the legend

    Physics: Post your doubts here!

    you should consider initial vertical velocity ut when calculating for s .....and the way to do that is in the ms
  10. queen of the legend

    Physics: Post your doubts here!

    In both cases it has been rounded
  11. queen of the legend

    Physics: Post your doubts here!

    you are asking question from paper 3 ....there are uncertainty questions in paper 2 as well ! the questions you have asked are part of the whole experiment ....its not possible for me to know the timing recorded unless i do the expt my self !! please go through some uncertainty in paper 2...
  12. queen of the legend

    Physics: Post your doubts here!

    i think its up to you ..it doesnt matter u put dot , stars or crosses s long as you graph is right
  13. queen of the legend

    Physics: Post your doubts here!

    post a question that you dont understand !
  14. queen of the legend

    Physics: Post your doubts here!

    look at mark scheme this is self explanatory! to find power you divide K.E which is also work done by time , and since efficiency of energy transfer is 25% you will multiple v by 0.25....so P= o.5 mv^2/t now substitute for m/t which is mass of water flowing per second...simple :)
  15. queen of the legend

    Physics: Post your doubts here!

    you did not mention what part of question 5 you did not understand. anyhow i will explain the first one in thich it says that T2 lags behind a phase diff. 60 degrees there is a rule : phase diff.(theta) = (t/T) X 360 . thetais given as 60 degrees. T is time period for one oscilation and t is...
  16. queen of the legend

    Physics: Post your doubts here!

    principle of conservation of momentum states that provided no external force act , the momentum of a sytem is conserved. since in the system of ball and earth , a force of gravitation is acting tht causes acceleration or change in momentum, the law of conservation does not apply.
  17. queen of the legend

    Physics: Post your doubts here!

    since W=QV for work done in electric circuit and kinetic energy K= 0.5 mv^2 which is also equal to work done we can relate these two equations as QV=0.5mv^2 the question says that the pd is the same and ofcource Q is also constant so v, the speed will be always same as well i hope you understood! :)
  18. queen of the legend

    Physics: Post your doubts here!

    this is very easy if you were able to do part a , in part a you re asked to calculate the gradient! you found the gradient =s/t^2 . think of this kinematic equation s=0.5 at^2 . we do not consider s= ut+0.5 a^2 because the car does not have any constant initial velocity before its acceleration...
  19. queen of the legend

    Physics: Post your doubts here!

    If you are attending oct/nov exam for physics go throught the syllabus and study according to learning outcomes besides you can check wether you should study pressure and upthrust !
  20. queen of the legend

    Physics: Post your doubts here!

    Anyone having problem in vectors or any other relative topic of physics can refer to this website: http://www.physicsclassroom.com/Class/vectors/u3l1a.cfm its quite helpful for clearing up concepts :)
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