• We need your support!

    We are currently struggling to cover the operational costs of Xtremepapers, as a result we might have to shut this website down. Please donate if we have helped you and help make a difference in other students' lives!
    Click here to Donate Now (View Announcement)

Search results

  1. Suchal Riaz

    Physics: Post your doubts here!

    The central fringe is most brightest. And then the second one is less bright. And so on. So the last couple of fringes we see are very very less bright. As now the overall brightness increase, we are able to see those fringes which otherwise wouldn't be visible to us as their brightness would...
  2. Suchal Riaz

    Mathematics: Post your doubts here!

    the syllabus uses the word 'lamina' which means it has no width. lamina is a 2d object.
  3. Suchal Riaz

    Mathematics: Post your doubts here!

    do they really give 3d figues of these kinds of questions or it is the first time? and my research on internet told me that we need multivariable calculus to find centre of mass of a 3d object. wtf?
  4. Suchal Riaz

    Mathematics: Post your doubts here!

    I had to use a lot of manipulation of indices, comversion of (1+x)(1-x)=1+x 2 . It required a lot of algebra. So be careful.
  5. Suchal Riaz

    Physics: Post your doubts here!

    i explained it earlier. didn't you get it? what problem u are having in it. we can discuss.
  6. Suchal Riaz

    Mathematics: Post your doubts here!

    There must be three men, two women. For the three men, there are 6C3 combinations. For women there are 4C2 combinations. So the total is 6C3*4C2=120 Lets find in how many combinations can both man and woman be in the committee. If they both are selected, there are 5C2 combinations of men. And...
  7. Suchal Riaz

    Chemistry: Post your doubts here!

    Do atp of o level. It has the reading and all u need to do is to draw graph or do working.
  8. Suchal Riaz

    Chemistry: Post your doubts here!

    As it can be seen X- was oxidised to X2 so it worked as a reducing agent. x- reacted with two other oxidising agents, Y- did with nine and Z- reacted with only one. So X- is strongest and Y- is weakest. For seventeen, it can be seen that the oxidation only occurs when sulphuric acid reacts with...
  9. Suchal Riaz

    ◘===☼/~~◘► O level and A level Distinctions (May/June and Oct/nov 2013 )

    Oh my god. I didn't get ANY distinction? :cry:
  10. Suchal Riaz

    Mathematics: Post your doubts here!

    Keeping the permutaion of vowels the same, there are 8 ways to arrange the first consonent, 7 for the second and 6 for the third consonent. So the answer will be 8*7*6=336 I used a different way to do but i got the same answer so i guess the answer will be correct.
  11. Suchal Riaz

    Mathematics: Post your doubts here!

    i know that. but it is a 2 marks question and it was easy to spot that the answer is 10. just a few seconds of mental calculations and i came up with this answer. and it is correct. you can take the longer route if u want. i was too lazy to integrate that expression as u wanted the answer to the...
  12. Suchal Riaz

    Mathematics: Post your doubts here!

    No my answer is correct. It is 10pi. Meaning k=10.
  13. Suchal Riaz

    Physics: Post your doubts here!

    If i am wrong then sorry i am just an As level student.
  14. Suchal Riaz

    Physics: Post your doubts here!

    The positive charge will attract negative charge. As the container is earthed which is at zero potential, negative charge will flow towards the positive potential induced on the container.
  15. Suchal Riaz

    Physics: Post your doubts here!

    The intensity is inversely proportional to area on which it falls not through which it passes. As the bright fringes would be the same distance apart as fringe separation and distance of screen is unchanged., the area at which the light falls would be the same. But now only difference is that...
  16. Suchal Riaz

    Mathematics: Post your doubts here!

    I am just guessing btw. For y to be zero, either sin or cos have to be zero. Graph starts at zero as sin is zero. Then graph comes to zero when cos is zero. Which is at 2X=pi/2. Therefore x=pi/4. For one area the interval is of pi/4. For 40 A it must be 40/4=10pi. Is my answer correct?
  17. Suchal Riaz

    Mathematics: Post your doubts here!

    Actually it is not difficult but tedious. No problem. Feel free to post any question. It will be like practice to me as i have'nt done past papers
  18. Suchal Riaz

    Physics: Post your doubts here!

    This is A level thread. Not for o level, kid.
  19. Suchal Riaz

    Physics: Post your doubts here!

    There are two tricks in this question. First thing is that it is a length force graph not extension force. So the area Y represent the energy. But Y is not in option. That is second trick. That the area Z is equal to Y clearly. As diagonal of a rectangle cut it into two equal triangles...
  20. Suchal Riaz

    Physics: Post your doubts here!

    ijlalm i guess you deleted your response. Actually very large means that the m2/m1-->infinity. That means that this will never happen unless the bigger mass is much much bigger. Such as a ball and the earth. But the neutron and nitrogen are not the same way. M2/m1=14 which is not as big as...
Top