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  1. Saturation

    perfectly elastic collision vs elastic collision?

    Is there a difference between them? I think that a perfectly elastic collision is one in which the 2 particles collides, and move away or in the same direction, WITHOUT sticking together, while an elastic collision can be one in which the particles stick together. My book says that the...
  2. Saturation

    Chem MCQ qs!

    http://www.xtremepapers.me/CIE/Internat ... 7_qp_1.pdf Number 35, I get that MgO and and BaO will form, but won't the MgO formed react with the NO2 (acidic oxide), forming magnesium nitrate? Please explain! The answers B btw.
  3. Saturation

    Is calcium Hydroxide strong or weal!?

    Is calcium hydroxide a strong or weak base? I get that it's only slightly soluble, but then net says that whatever CaOH2 that does dissolve, completely splits up into ions!? Can someone explain this please!?
  4. Saturation

    Kp changes?

    Ok, so the only factor which changes the value of Kc , is temperature. Is this the same case with Kp? I'm thinking so, since increasing the pressure of the gas = increasing the concentration of the gas. Can someone confirm this!? Thanks!
  5. Saturation

    Oxidising alchols?

    Ok, so I know that primary and secondary alcohols are oxidised with potassium dichromate and permanganate, but will they also get oxidised with FEHLINGS or TOLLENS reagents?
  6. Saturation

    Physics P1 questions! HELP!

    http://www.xtremepapers.me/CIE/Internat ... 5_qp_1.pdf Number 24: Can someone please tell me what the question is asking us?? I don't get the QUESTION! :shock: Number 27 : I don't get how the answer is C ?? I got the wavelength as 15mm and the speed of microwaves = speed of light!? I chose...
  7. Saturation

    Phase difference waves AS!

    To compare the phase difference between two waves, the waves have to have the same frequency and wavelength right???! (i'm referring to what we need for AS-level, not wikipedia stuff!)
  8. Saturation

    Phy AS HELP!

    http://www.xtremepapers.me/CIE/Internat ... 9_qp_2.pdf Varient 1. QUESTION 4(b) What i dont get is how is it 0.5e for the second arrangement! Doesnt each spring extend by 0.5e? Since they are asking for the TOTAL extension, don't we add them?
  9. Saturation

    Physics Momentum AS QS! Help!

    Please explain this qs to me!: (Number 3(bi)) http://www.xtremepapers.me/CIE/Internat ... _qp_21.pdf I thought that the change in momentum is = mv - mu If I do that, I get -1.33, while the ms gives +1.33 Help? MS: http://www.xtremepapers.me/CIE/Internat ... _ms_21.pdf This is not the only...
  10. Saturation

    Physics AS Nuclear section HELP!

    Ok, so nuclear decay is random and spontaneous. The fluctuations in the geiger meter indicates that nuclear decay is a random and spontaneous process right? And, the half life of a radioactive substance is uncertain because nuclear decay is random, or random AND spontaneous? :Search:
  11. Saturation

    How did Phy Paper 31 go?

    I think it was a decent paper! The rheostat looked scary, but the paper told you exactly what you had to do! 8) 8) :Yahoo!: 8) 8)
  12. Saturation

    INFO on Phy Prctical 31?

    Guys, any new info on physics paper 31 I got a "hint" that it might contain something involving a rheostat!? :unknown: :unknown: :unknown: Any conformation?
  13. Saturation

    Mechanics M1 HELP!

    http://www.xtremepapers.me/CIE/Internat ... 3_qp_4.pdf Question 5, part (ii) I get that for block B, the equation will be: 2-0.2-T= 0.2a But how do you do it for block A? I don't get what the Mark Scheme says: http://www.xtremepapers.me/CIE/Internat ... B6%2B7.pdf HELP! Thanks!
  14. Saturation

    How was Chem Paper 31 for you!?

    It was a good paper! :Yahoo!: :good: How'd you find it ?! and btw don't "discuss" it!, just how did it go with you!? :Yahoo!:
  15. Saturation

    Can someone give me a set of temperature readings?

    Can some one please give me a set of temperature readings for this Chemistry practical, cause i wan't to work on the graph and all!: Question (b): http://www.xtremepapers.me/CIE/Internat ... _qp_31.pdf Thank you! :)
  16. Saturation

    MAths P1 Trigonometry help!

    Question 2: http://www.xtremepapers.me/CIE/Internat ... _qp_12.pdf The mark scheme doesnt make sense! I would like to know how you do it starting from the right hand side! Thanks!
  17. Saturation

    Maths Mechanics (M1) question!

    http://www.xtremepapers.me/CIE/Internat ... _qp_43.pdf Question 3 part (i) Can some one please explain how to do it? :Search:
  18. Saturation

    Hydrogen Iodide reducing agent? AS theory!

    It says in the book, that hydrogen Iodide is the least stable hydrogen halide. that makes sense, but it says that it can act as a strong reducing agent!? Can someone explain please? Thank pou!
  19. Saturation

    P4010 and sulfur trioxide polarity!

    Hi! Is P4010 (phosphorus oxide) and sulfur trioxide (SO3) polar? oh, and sulfur trioxide is a liquid at room temperature? Thanks! :Bravo:
  20. Saturation

    examiner reports: W 10

    Can anyone please provide me with the OCTOBER/ NOVEMBER 2010 examiner reports for : Physics Chemistry Maths (9709) Thank you!
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