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  1. The Sarcastic Retard

    Physics: Post your doubts here!

    which part u dnt understand? i will explain u that as i dont think there is ny other approach
  2. The Sarcastic Retard

    Mathematics: Post your doubts here!

  3. The Sarcastic Retard

    Mathematics: Post your doubts here!

    I mentioned in above post, this means the two lines will have same gradient. :)
  4. The Sarcastic Retard

    Mathematics: Post your doubts here!

    That t is b/w 10 and 20 minutes. So the difference is of 10 minutes. That shows, For 10 minutes passangers will be abbbove 90m
  5. The Sarcastic Retard

    Physics: Post your doubts here!

    Thanks.
  6. The Sarcastic Retard

    Mathematics: Post your doubts here!

    They have done like this : Domain of h is Range of h inverse. As range of h inverse has positive values, so we chose positive in that +/- sign.
  7. The Sarcastic Retard

    Mathematics: Post your doubts here!

    The gradient is same in both the lines. This is what they meant to say. So below the red line they have equate the two lines as they are intersecting to find out coordnates of C
  8. The Sarcastic Retard

    Mathematics: Post your doubts here!

    (ii) One complete rotation = 2pi therefore 2pi = kt t =30 Thus k = pi/15
  9. The Sarcastic Retard

    Physics, Chemistry, Biology --------> Hardest Questions Compiled #A Level Version

    Thanks. ^_^
  10. The Sarcastic Retard

    PHYSICS PAPER4!!!

    For example check this link : http://www.cie.org.uk/images/252983-physics-9702-grade-thresholds-june-2015.pdf Here, you can see that in GT for scoring an A grade in paper 4 u should atleast get 55 marks in it. :) So dont worry, GT varies in this range as mentioned in above post. Good luck. ^_^
  11. The Sarcastic Retard

    Physics: Post your doubts here!

    Can anyone state what is newtons law of gravity? I write like this : It states that it is the force of attraction between two masses which is directly proportional to the product of that masses and inversly proportional to the square of the sepration of that masses. If I write this, wont I get...
  12. The Sarcastic Retard

    Physics: Post your doubts here!

    Potential difference is the work done per unit charge. So yes W is work done. :)
  13. The Sarcastic Retard

    Physics: Post your doubts here!

    Not understood?
  14. The Sarcastic Retard

    Physics: Post your doubts here!

    Idividual sum of electric potentials. That 0.02 is the one small division on y axis. Here :~
  15. The Sarcastic Retard

    Physics: Post your doubts here!

    1 : 1 ratio. Here :~
  16. The Sarcastic Retard

    Physics: Post your doubts here!

    3biv) V = (14.5 + 7)*0.02 = 0.43V <------ Potential = individual sum of electric potentials. V = W/Q W = VQ W = KE KE = 0.43 * 2 * 1.6 * 10^-19 = 1.38 x 10^-19 J
  17. The Sarcastic Retard

    Physics: Post your doubts here!

    Q8bi) Number = moles * NA (Avogadro's constant) = (1.2/235) * 6.022 * 10^23 = 3.08 x 10^21 (ii) Let lambda = L Activity = LN N = No*e^(-Lt) N(krypton) = 3.1*10^21*e^(-0.231*3600) = 0 so activity = 0 N(barium) = 3.1*10^21*e^(-6.4*10^(-4)*3600) = 3.1 * 10^20 <------ This many numbers left after...
  18. The Sarcastic Retard

    Chemistry: Post your doubts here!

    As TariqBhai explained, if Ecell value is positive means reaction will be occurring. As reaction is occurring that simply means reaction is moving in forward direction. This means more product. And the reaction which arent feasible are the ones that have negative Ecell and the reaction will move...
  19. The Sarcastic Retard

    Physics, Chemistry, Biology --------> Hardest Questions Compiled #A Level Version

    I appreciate all your time you used in this. I checked them all, its for just As level (MCQ). Can u do this for A level paper 4 of chem and phy? thanks. :)
  20. The Sarcastic Retard

    Mathematics: Post your doubts here!

    http://bmaths.weebly.com/uploads/2/5/6/4/25647388/s1_revision_pack_4_-_probability_distributions.pdf Q13
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