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  1. S

    Physics: Post your doubts here!

    Considering 2 kg mass, we have the equation: T stands for tension, F for Friction mg-T=ma 20-T=2a....(i) Now for 8 kg mass, T-F=ma T-6=8a....(ii) Equating both the equation we get a= 1.4 ms^-2
  2. S

    Physics: Post your doubts here!

    Just use the formula: 1/R=1/r1 + 1/r2 Since there are 6 copper wire the equation would be 1/R = 6/10+1/100 R=1.6 ohm
  3. S

    Physics: Post your doubts here!

    My mistake, yeah its 1.4 actually. I Miscalculated sorry
  4. S

    Physics: Post your doubts here!

    Considering 2 kg mass, we have the equation: T stands for tension, F for Friction mg-T=ma 20-T=2a....(i) Now for 8 kg mass, T-F=ma T-6=8a....(ii) Equating both the equation we get a= 1.8 ms^-2
  5. S

    AS and A-Level Physics Definitions

    Oh no matter. Someday, If I find time. I will help to decipher the patterns CIE uses for their papers in physics. :P
  6. S

    Physics: Post your doubts here!

    NOV-5 Q 8 The answer is A, as F is directly proportional to A, as F=ma. So A against time would give you the same sloped graph as in the question. And since A is constant all the time, speed would be raised at a constant rate, hence a straight line. Q 11 The answer is A because only...
  7. S

    Physics: Post your doubts here!

    @Abdulrab The link you have given seems invalid. Could you link papers contained database of this site itself.
  8. S

    Physics: Post your doubts here!

    Well, I thought the answer was A because averaging the diameters and finding the volume gives 8.9 as the answer. But it seems that it is in terms of significant figures the answer should be. I don't know for sure though
  9. S

    AS and A-Level Physics Definitions

    Thank you sweetiepie. But it would be better if you had notes accordingly to the papers. For instance, P1 needs a lot of propotionality and graphs, so it would be better if there would be a compilation the relations of equations and graphs of each chapters. Just saying you know. I find every...
  10. S

    Physics: Post your doubts here!

    The answer is A, I guess. Well I am unsure if so. Can you please tell me the answer, then I think I can explain the reason here.
  11. S

    Physics: Post your doubts here!

    The uncertainties are not divided, rather the percentage or fractional uncertainties should be added for those type of equation. Look here: Suppose you have A=B+C Now that you are given uncertainties of B and C, you can directly add the uncertainties. It is the same if you are given B-C, you...
  12. S

    Physics: Post your doubts here!

    You should consider the length also.Look here: R=(resistivity*length/Area) Now, Since length is decreasing at a constant rate V also decreases at a constant rate. The resistivity is p and is constant for a certain length. So V keeps on decreasing constantly. Now consider at the beginnining of...
  13. S

    Physics: Post your doubts here!

    Any one, help on OCT NOV 08 , QP 37
  14. S

    Physics: Post your doubts here!

    I am uncertain whether its A or D
  15. S

    Physics: Post your doubts here!

    The answer is not B because in B the resultant of the two forces(the rods that support the weight) gives the force equal to the weight itself in both the direction and magnitude. But if you consider A, The resultant of the two supporting rods gives the force that is equal and opposite to the...
  16. S

    physics p5 help

    oh its like this %uncertainity in l^2=2*%uncertainity in l
  17. S

    PSYCHOLOGY

    Study the subject of your interest. A bit of everything or every knowledge will help you determine which pace you would want to take for your career. Impersonate yourself with a successful person
  18. S

    physics p5 help

    After the graph, every uncertainity is calculated from the graph itself. Gradient uncertainity=G:worst fit- G:best fit Uncertainity in Y-intercept= Y:worstfit- Y:bestfit
  19. S

    absolute error with and without log

    suppose you are given a, log a and error:a error in log a is given by =log(error:a + a) - log (a)
  20. S

    Physics: Post your doubts here!

    Intensity is 1/4th
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