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  1. MiniSacBall

    Physics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_s10_ms_23.pdf Q1 a ii) How to do it i mean apart from adding 0.02, why do we add 0.01, is it because of the +-1 digit.
  2. MiniSacBall

    Physics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_s10_qp_22.pdf Q4 c) Why λ/4, why not λ/6 or λ/8...etc. Explain please?
  3. MiniSacBall

    Physics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_w09_ms_21.pdf Q6 b) Idk how to do this :(. http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s10_qp_22.pdf Q4 c) 'at lowest frequency, length =...
  4. MiniSacBall

    Physics: Post your doubts here!

    I have been saying this guy the exact same thing for like hours, he is so worried about s.f. So now this is from CIE SALLAYBUS: Mathematical requirements: take account of accuracy in numerical work and handle calculations so that significant figures are neither lost unnecessarily nor carried...
  5. MiniSacBall

    Physics: Post your doubts here!

    Dude just don't worry about significant figures, they won't cut the marks, only if the questions says, that your answer should be in _ significant numbers, then only you have to worry about significant figures. The answer could be both 4.5*10^-3 or 4.53*10^-3 Both are same
  6. MiniSacBall

    Physics: Post your doubts here!

    Post in only 1 post, why are you posting 2 times. As i said they won't cut marks unless, it is stated in the question, Most of the time it is in 3 significant figures, so don't worry. The 2 significant one are like this: eg: if your answer is like 21.998766737230192 Then 3 significant figures is...
  7. MiniSacBall

    Physics: Post your doubts here!

    Well mostly it is 3-2 significant figures, 3 is better as the answer is more accurate and in most of the papers you will find answers in 3 significant figures. I guess CIE will only cut marks, if the question says 'Write your answer in appropriate number of significant figures', here you should...
  8. MiniSacBall

    Physics: Post your doubts here!

    Oh i am sorry i am extremely bad at physics :cry:, i have no concept at it. I am extremely sorry :giggle: Thank you so much!
  9. MiniSacBall

    Physics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_s10_qp_21.pdf 5 c) The direction on N would left and the direction on p would be right? Right!
  10. MiniSacBall

    Physics: Post your doubts here!

    Why do we need to calculate path difference i didn't see any use.:p And did you calculate those, i mean when n = 0 then it will be λ/2 which is 4.125, λ=8.25 I don't know how did you get 56
  11. MiniSacBall

    Physics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s10_qp_21.pdf Q2 b ii I just don't know how did they get the speed from the graph!
  12. MiniSacBall

    Physics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_w09_qp_21.pdf Q5 c) Any body please draw a rough diagram, i just want to get an idea about such question, could you please answer this whole question and show me. Thanks,
  13. MiniSacBall

    Physics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s06_qp_2.pdf Q7 a) My only doubt is when S1 was closed the resistance was 15 ohm, so it means that A had a resistance of 15 ohm, isn't it. Then when S2 only was closed then resistance was 30 ohm. So it...
  14. MiniSacBall

    Physics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_s05_qp_2.pdf q7 b iii Explain please!
  15. MiniSacBall

    Physics: Post your doubts here!

    I was stuck in this for a while because i forgot that i was doing physics, i was using mechanics xD Well you can use two ways, 2gs=v^2-u^2, or K.E lost = P.E gained (Since air resistance is neglected). Well in the case of 2gh=v^2 - u^2 , here you can use the values of g = -9.8 [because it is...
  16. MiniSacBall

    Physics: Post your doubts here!

    Thank you, but i wanted the (i) part and (iv)
  17. MiniSacBall

    Physics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_s05_qp_2.pdf q6 b)
  18. MiniSacBall

    Mathematics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20(9709)/9709_s13_qp_41.pdf Q3 iii i need help please! Explain.
  19. MiniSacBall

    Physics: Post your doubts here!

    Well, after this step why do we multiply by 0.62 m .
  20. MiniSacBall

    Physics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_w04_qp_2.pdf 5) b) i) How is it possible to just multiply those values, i mean one is in m other is in mm. How could you simple do that. Anyways i don't know how do that question. All i...
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