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Recent content by paperneeder100

  1. P

    when the papers of winter 2k15 will be released??

    13th January for AS/A Level, and 19th January for IGCSE (I think).
  2. P

    9702_w15_qp_22 Preparations.

    Polymers aren't necessarily supposed to be cross-linking. The can be tangled chains too. Thermoplastics are one such example of polymers which have tangled chains.
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    9702_w15_qp_22 Preparations.

    3 s.f. is the norm, unless explicitly stated by the question, which is quite rare.
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    9702_w15_qp_22 Preparations.

    Thanks everyone! You not only helped ahmedish, but me too.
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    9702_w15_qp_22 Preparations.

    ahmedish About 9702_w10_qp_23 Q2: Crystalline solid: Solid containing ions in a regular lattice structure. It is a long range structure because the lattice consists of repeating units of ions in a regular arrangement. Polymer: Long chains of monomers (repeating units). They can have...
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    9702_w15_qp_22 Preparations.

    Yeah. That actually is very true. Batteries are chemical cells which produce voltage in the form of EMF, so your definition for that is correct. As for PD, it is quite correct, seeing that PD can also be defined as work done or energy transferred between two electrical components in unit charge.
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    9702_w15_qp_22 Preparations.

    The Sarcastic Retard Thanks for the suggestions! ahmedish What do you mean by that long & short range order of polymers and crystalline solids? Interference: A phenomenon which coherent waves undergo when they experience points of cancellation (where there is zero amplitude, which means silence...
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    9702_w15_qp_22 Preparations.

    Thanks once again! Do you know of any website for Biology?
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    9702_w15_qp_22 Preparations.

    Thanks for the help in advance. Can you explain Kirchhoff's First Law in general?
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    9702_w15_qp_22 Preparations.

    This session's papers so far have been completely different from the one's we've given or solved before. I mean, I didn't even expect the enthalpy of solution and hydration to appear in the Chemistry paper. As for Kirchhoff's Laws, I get nothing.
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    9702_w15_qp_22 Preparations.

    Most questions come from kinematics and that friction slope type sums. Also, try practicing derivations of stuff (like say, resistance) using SI units, as they are quite common, and mostly appear as the first question to a paper. Radioactivity wouldn't be too much of a problem (I hope it's...
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    How was 9702_w15_qp_34?

    As I said, no problem. I mean, this is the objective of this forum.
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    How was 9702_w15_qp_34?

    That video also has a link on how to solve titration sums (I don't think we need them), but for the sake of completeness, you could go through it. As for qualitative analysis, I would suggest that you study the qualitative assessment charts given at the back of our practical papers even though...
  14. P

    How was 9702_w15_qp_34?

    I was typing it before you sent that. For titrations, you can refer to this video (www.youtube.com/watch?v=sFpFCPTDv2w). It's quite good.
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    How was 9702_w15_qp_34?

    No problem.
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