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  1. Mahnoorfatima

    Physics: Post your doubts here!

    In part ii, don't we have to convert power into energy first??? And why are we subtracting the masses? We don't consider the overall total mass? And please explain 2 as well. SOMEONE
  2. Mahnoorfatima

    Physics: Post your doubts here!

    Cam someone please explain the use of a signal generator in P5 experiments I don't get what is it used for and why is it used.? And if someone has the method of calculations of uncertainties in Q2 p5, please post it here? I need help in those? :3
  3. Mahnoorfatima

    Can A2 be retaken in different years??? Please answer urgently!!

    First I hope no one has to retake anything INSHAA ALLAH, but I was just wondering if incase you have given AS in June 15' and you give June 16' A2, so can you repeat November 2016 just A2 or you have to appear in a composite (AS+A2)?
  4. Mahnoorfatima

    A level Biology: Post your doubts here!

    SOMEBODY EXPLAIN PLSSSS
  5. Mahnoorfatima

    A level Biology: Post your doubts here!

    You can't retake A2, right.? (Hope no one has to inshaa Allah) but just wondering, if so you'll have to give a composite right???
  6. Mahnoorfatima

    A level Biology: Post your doubts here!

    Why does the carbohydrate content of a seed increased when the outer layer of the seed is removed? Is it because the starch cam no longer be hydrolysed into maltose and glucose as the aluerone layer of the seed contains amylase which is activated by GA in the embryo which is also removed??? And...
  7. Mahnoorfatima

    A level Biology: Post your doubts here!

    Because the axon membrane has more protein channels for potassium than for sodium therefore it's natural for some potassium ions to diffuse out faster than sodium diffuses in. But at the same time there are many negatively charged molecules inside the cells of the axon that attract K+. This...
  8. Mahnoorfatima

    A level Biology: Post your doubts here!

    Is this in our course anymore??
  9. Mahnoorfatima

    A level Biology: Post your doubts here!

    What at the advantages of increased number of synapses? I get that a wider range of responses can be generated but how do I explain it?
  10. Mahnoorfatima

    A level Biology: Post your doubts here!

    Question 4 part c and d anyone? A2
  11. Mahnoorfatima

    Physics, Chemistry and Biology: Post your doubts here!

    Ci anyone!???
  12. Mahnoorfatima

    A2 Chemistry Summary

    Oh okay thankyou!
  13. Mahnoorfatima

    A2 Chemistry Summary

    I thought this was supposed to be paper 5..?
  14. Mahnoorfatima

    Physics: Post your doubts here!

    No! See you can't just change the resisitance of the fixed resistance if the current flowing through it is the same as it was before. Ratio of the resisitances does not increase in both of the loops. How can it? You shoud treat these loops seperately as seperate circuits. The main thing is the...
  15. Mahnoorfatima

    Physics: Post your doubts here!

    Look at the position of the ammeter. It's connected next to the fixed resistor and the fixed resistor is parallel to the variable one therefore the currents have to be different in both the loops i.e the ammeter is only giving you the current across the fixed resitance.
  16. Mahnoorfatima

    Physics: Post your doubts here!

    Look the question has itself given you the answer "constant velocity" What does this mean? Forces are at equilibrium or are balanced thus look for such a diagram which would follow the course of a complete triangle. Look at the arrows. Every arrow should lead to a complete triangle. Idk how to...
  17. Mahnoorfatima

    Physics: Post your doubts here!

    Four resistors of resistance R, 2R, 3R and 4R are connected to form network. Battery of negligible internal resistance and voltmeter are connected to the resistor network as shown. Voltmeter reading is 2 V. What is electromotive force (e.m.f.) of the battery? A 2 V B 4 V C 6 V D 10 V The...
  18. Mahnoorfatima

    Physics: Post your doubts here!

    I don't get one thing, forexample in Torque when an object is horizontal, shouldn't the resultant turning moment be zero?
  19. Mahnoorfatima

    Physics: Post your doubts here!

    Current is unchanged because it's connected with the fixed resistor which will have a different reading as compared to the one with the variable one as they're connected in parallel and the reading of the voltmeter decreases because there's an increase in resisitance leading to a decrease in...
  20. Mahnoorfatima

    Physics: Post your doubts here!

    Just asking, How do you guys post the screenshot thingy? I don't usually get answers if I post the whole paper and ask for a certain question. :(:mad::confused:
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