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  1. Saad Mughal

    Biology; Chemistry; Physics: Post your doubts here!

    A physical property such as: Volume of fixed mass of liquid is used in liquid in glass thermometers. Voltage produced by two conducting wires is used in thermocouples. Pressure of a fixed mass of gas at constant volume is used in gas thermometers. Resistance of a variable resistor (such as...
  2. Saad Mughal

    Biology; Chemistry; Physics: Post your doubts here!

    Sulphur is never deposited, at the anode (in all solutions of sulphates) oxygen gas is given off, this is because sulphate ions are more stable and tend to stay in ionic form and do not give away their electrons easily. Hydroxide is more easily discharged and hence oxygen gas forms. At the...
  3. Saad Mughal

    You're bound to run short on popcorn if you're going to watch/read our arguments. ;)

    You're bound to run short on popcorn if you're going to watch/read our arguments. ;)
  4. Saad Mughal

    Biology; Chemistry; Physics: Post your doubts here!

    No. It's correct. When the number of turns increases, the frequency of the output voltage becomes higher and so does the highest value of voltage (amplitude).
  5. Saad Mughal

    Biology; Chemistry; Physics: Post your doubts here!

    This is your basic ray box experiment for light. Equipment: Light source/Ray box, plane mirror, a handful of pins, protractor, wooden barrier. The light source (or ray box) is placed at an angle to the plane mirror and is turned on. Two or three pins are placed to show the light rays incident...
  6. Saad Mughal

    Maths, Addmaths and Statistics: Post your doubts here!

    Let x be recommended calories. 166 = 8.3% * x 166 = 8.3/100 * x x = 166*100/8.3 x = 2000 calories.
  7. Saad Mughal

    Biology; Chemistry; Physics: Post your doubts here!

    :eek: No actually it translates to "Lo karlo baat aur sunlo iski baatayn" (I'm not too good at this frankly) :oops:.
  8. Saad Mughal

    Biology; Chemistry; Physics: Post your doubts here!

    I'm Punjabi. I know what you mean. :p But yeah honestly. Some life experiences have thought me to not be over-confident for anything. :)
  9. Saad Mughal

    Biology; Chemistry; Physics: Post your doubts here!

    Insha Allah! Thanks :)
  10. Saad Mughal

    Biology; Chemistry; Physics: Post your doubts here!

    And here I wonder that will I even get an A* this year.
  11. Saad Mughal

    Biology; Chemistry; Physics: Post your doubts here!

    Because excess electrons are continuously flowing into it as long as it is connected to the plate! This is not the same as earthing, this is different, it will gain negative charge because of the excess electrons. :)
  12. Saad Mughal

    Biology; Chemistry; Physics: Post your doubts here!

    I was just saying that because we've already found so many mistakes in the mark scheme. :P
  13. Saad Mughal

    Biology; Chemistry; Physics: Post your doubts here!

    The mark scheme is correct. While reading experiments, you guys might have came across the fact when charging a metal sphere, if you touch the sphere with the rod, the sphere gains the same charge as the rod (because of electron transfer). Now, in this question, the top plate is negatively...
  14. Saad Mughal

    Biology; Chemistry; Physics: Post your doubts here!

    You should know that systems that convert energy from one form to another are not 100% efficient. In power stations (especially thermal power stations), the efficiency can be as low as 35%! You should also know that in power stations, most energy is lost in the form of heat.
  15. Saad Mughal

    Physics (5054) ATP HELPPPPP!!

    :)
  16. Saad Mughal

    Physics (5054) ATP HELPPPPP!!

    Here you go. :) P.S. I do not own any of the notes!
  17. Saad Mughal

    Biology; Chemistry; Physics: Post your doubts here!

    (a)(ii) I'm not sure of whether I'm using the correct method, but for thermometers the general formula is (Xy-X0/X100-X0) * 100. In this thermocouple, the varying quantity is the voltage and the division b/w the two junctions (given) is 50 deg., so, Initial voltage = 6.2 mV, Final voltage 6.8...
  18. Saad Mughal

    Biology; Chemistry; Physics: Post your doubts here!

    Here you go. :) Go to page 20 of the pdf.
  19. Saad Mughal

    Biology; Chemistry; Physics: Post your doubts here!

    No, I've learnt things from different sources (I know about oxides too but they are not part of the syllabus). The book Fundamental Chemistry (in my opinion) is one of the best books to cover the chemistry syllabus. It has details of everything relevant only to the syllabus. And yeah, I know Sir...
  20. Saad Mughal

    Biology; Chemistry; Physics: Post your doubts here!

    Do topical Acids and Bases questions, they help in reinforcing your memory of the solubility of salts.
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