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Recent content by Harsheys

  1. H

    How was 9709_w16_qp_32

    Not bad, but my complex no. part a) and x-coordinate of M and area under the graph were weird. What did y'all get for those
  2. H

    How was 9702_12_W15??

    I said the force exerted on Y is the same as F, I don't get how they would exert different forces on each other.
  3. H

    How was 9702_12_W15??

    Actually it's supposed to be the stationary wave on a wire. Water waves cannot oscillate on more than 1 plane, and stationary waves can also be polarized, google it :)
  4. H

    How was 9701/33 chem praticals?

    Not brown per se, but off white with the Manganate ion, which turns brown with addition of H2O2 Mg^2+ was confirmed by white ppt with NaOH, insoluble in excess. I had some time on my hands so I tested with NH3(aq), getting the same white ppt, insoluble in excess result. And the gas with the...
  5. H

    How was 9701/33 chem praticals?

    No no, the ions in FA 6/7 were H+ ions In FA5, it was CO3^2- Hence your equation would be: Cu^2+(aq) + CO3^2-(aq) => CuCO3(s) In FA8 it was Mn^2+, Mg^2+ and CO3^2- That's what I got anyways
  6. H

    How was 9701/33 chem praticals?

    24.75 The supervisors was apparently 25.00
  7. H

    How was 9701/33 chem praticals?

    Hmm, I'm not too sure about the percentage purity of CaCl2 And the anion in FA5, does anyone know what it is? I said CO3^2- because you can't add CuSO4 to a sulfate and get a precipitate, CO3^2- was the only other logical choice.
  8. H

    How was 9709 paper 4 (Mechanics 1)?

    Haha I'm not wrong Mass of A (on the ramp) was 0.5kg, mass of B was 0.1 kg The ramp was 2.5m long and 0.7m high, so that means that sin(Theta)=7/25 Component of A down the ramp will be mgsin(theta), and hence you get 1.4N Use newtons second law, F=ma 1.4 - T = 0.5a T - 1 = 0.1a Add to...
  9. H

    How was 9709 paper 4 (Mechanics 1)?

    I just solved it and I'm getting 1.9524m for my length of string. T=1.0666... a=2/3 (for 0.7m), then 2.8 (after the string breaks) v (when string breaks) = *root* (2 x 2/3 x 0.7) = 0.96609 then it increases to 2 So 2^2 = 0.96609^2 + 2(2.8)s s = 0.5476 So the length of string will be...
  10. H

    How was 9709 paper 4 (Mechanics 1)?

    But what was the length of the ramp? I'm trying to figure it out right now
  11. H

    How was 9709 paper 4 (Mechanics 1)?

    For question 5, what did you guys get for the length of the string? Could someone also give me the length of the ramp. I know the height was 0.7m
  12. H

    How was 9702 W15 paper 22?

    The electricity question was why the power is not 48W, which is when you say some voltage is lost overcoming the internal resistance of the cell so the lamp doesn't get all 12V, so power is not 48W Could someone explain what happens to current and resistance when the other switch is closed...
  13. H

    How was 9700_w15_p22?

    What did you guys say for the "Behavior of chromosomes/spindle that ensures production of genetically identical cells"?
  14. H

    How was 9700_w15_p22?

    I don't think its due to a pathogen infestation in the lungs because its emphysema. Emphysema has nothing to do with mucous production and cilia, it only affects the elastin in alveoli Hence there is less recoil in exhaling, so more air remains in the lungs even when the person has exhaled, So...
  15. H

    How was 9700_w15_p22?

    I don't remember exactly, But it asked why a non-smoker may be at risk of emphysema is the inhibitor of neutrophil elastase is not produced And there was the reasons for the inflammation of the lung due to emphysema And there was the artherosclerosis formation due to cigarette smoking Thats...
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