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  1. Mustehssun Iqbal

    Physics: Post your doubts here!

    Love to answer this Physics question : ) You start with re-drawing or editting the diagram in the picture, and you mark the; "perpendicular" distances from the lines of forces to the pivot and; the motion of the rod in terms of whether it is deduced to be clockwise or anticlockwise. And you get...
  2. Mustehssun Iqbal

    Simple tips... Hope they help :)

    like a sticker is a simile : ) And start studying with Bismillah
  3. Mustehssun Iqbal

    Simple tips... Hope they help :)

    Assalamu alaikum, I don't think sharing a tip would hurt here : ) it's good to maintain the attitude of solving a question or numerical and by that, I mean putting your real effort in solving the question. When you can't solve a question, re-solve the question, and when you can't solve the...
  4. Mustehssun Iqbal

    Physics: Post your doubts here!

    November 2005, Paper 1, Q.5; Q.5) let rogue be p p = m/v therefore p = m/(l * b * h) delta p/p = delta m/m + delta l/l + delta b/b + delta h/h therefore delta p/p = 0.1/25 + 0.01/2 + 0.01/2 + 0.01/1 therefore delta p/p = 0.004 + 0.002 + 0.005 + 0.01 Calculation part is a little bit...
  5. Mustehssun Iqbal

    Physics: Post your doubts here!

    November 2005, Paper 1, Q.16; Q.16) The barrel moves up the slope with a constant speed. Hence forces are observed to be in equilibrium. The resultant force on the barrel is zero since the barrel moves up the slope with constant speed. Work done = P.E + K.E + Wf Work done in the equation above...
  6. Mustehssun Iqbal

    thanks for following : )

    thanks for following : )
  7. Mustehssun Iqbal

    Physics: Post your doubts here!

    Assalamu alaikum, Q.26) A point source radiates energy uniformly in all directions. At a distance of 3.0 m from the source, the amplitude of vibration of air molecules 1 * 10^-7 m. Assuming that no sound energy is absorbed, calculate the aplitude of vibration 5.0 m from the source. Ans to Q.26 6...
  8. Mustehssun Iqbal

    Physics: Post your doubts here!

  9. Mustehssun Iqbal

    Physics: Post your doubts here!

    Apologies I misread your question! The object moves in a tangential path because there's no more centripetal force acting on the object. Centripetal force on the object acts towards the centre of the circle, and when it is removed, there's usually only one component of velocity remained of the...
  10. Mustehssun Iqbal

    Physics: Post your doubts here!

    Good question! Considering the Newton's second law, F= ma, the direction of acceleration is towards the direction of the applied force. Rather the object moves in a circular path. There is also a condition for an object to move in a circular motion. That is, the object is projected with an...
  11. Mustehssun Iqbal

    Chemistry: Post your doubts here!

    ok thanks loads! : )
  12. Mustehssun Iqbal

    Chemistry: Post your doubts here!

    Assalamu alaikum, How to identify dependent and independent variables in P5??
  13. Mustehssun Iqbal

    Physics: Post your doubts here!

    yeh wala nahi ata sry : /
  14. Mustehssun Iqbal

    Physics: Post your doubts here!

    oh q:
  15. Mustehssun Iqbal

    Physics: Post your doubts here!

    And you might not need to draw the table along with the diagram each time this question comes. It's to get an idea of how the graph of E against r is sketched.
  16. Mustehssun Iqbal

    Physics: Post your doubts here!

    E = k/r^2 is another representation of E is inversely proportional to r^2. V = k/r is similarly another representation of V is inversely proportional to r. and there's one mistake in the diagram . It's corrected here. I wrote E = k/r instead of V = k/r. Apologies. The correction is uploaded here.
  17. Mustehssun Iqbal

    Physics: Post your doubts here!

    there's the diagram. q:
  18. Mustehssun Iqbal

    Physics: Post your doubts here!

    Assalamu alaikum, I expect you have also done the first part of this question. You get E=deltaV/delta r or E= V/r or in other words, E is the gradient of V and r graph. You can also sketch a graph on a rough paper , and as a rough work in exam which you can erase afterwards, by taking several...
  19. Mustehssun Iqbal

    A discovery regarding paper 5s

    got more Physics p5s to practice with! OCR papers have planning questions. http://www.xtremepapers.com/CIE/International%20A%20And%20AS%20Level/9702%20-%20Physics/9702_s07_qp_5.pdf marking scheme for OCR papers...
  20. Mustehssun Iqbal

    Physics: Post your doubts here!

    got more Phsyics p5s to practice with! OCR papers have planning questions. http://www.xtremepapers.com/CIE/International%20A%20And%20AS%20Level/9702%20-%20Physics/9702_s07_qp_5.pdf marking scheme for OCR papers...
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