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  1. H

    ECAT and MCAT Preparation: Post your doubts here!

    Lol i don't exactly remember what the whole logic was behind it. I'll have to search my notes for it. I'll post the whole logic after 14th when i'm done with my practical exams :)
  2. H

    ECAT and MCAT Preparation: Post your doubts here!

    The answer is 6 Method is exactly the same as i mentioned for the PIEAS sample question.
  3. H

    ECAT and MCAT Preparation: Post your doubts here!

    Friction is independent of area of contact. I was pretty confused about this too about a month ago , but our Sir says that it is independent of area of contact And solid angle's unit is "Steradian"
  4. H

    ECAT and MCAT Preparation: Post your doubts here!

    The answer to the combustion analysis question is D- 50% KOH And the answer to the change in energy question is 0 J
  5. H

    ECAT and MCAT Preparation: Post your doubts here!

    Ecat is Engineering College Admission Test. So this thread is for any engineering university whose test you are going to take, including NUST, GIKI etc.
  6. H

    ECAT and MCAT Preparation: Post your doubts here!

    Lol i'm already doing that but the words are soooo hard to remember :/
  7. H

    ECAT and MCAT Preparation: Post your doubts here!

    Hey could you guys help me out? nust k test may Sat english hoti ha and my vocabulary isn't that good. So any tips or anything to prepare vocabulary? :/
  8. H

    ECAT and MCAT Preparation: Post your doubts here!

    Lol sorry mate. I havn't started preparing for entry tests yet because i'm busy with practical exams. I'll let you know if i find a good source :)
  9. H

    ECAT and MCAT Preparation: Post your doubts here!

    Ah it's really hard to explain maths like this. Anyway i'll try again. Do you know how to expand a 3x3 determinant? This is the same thing. When you expand a 3x3 determinant, you are actually converting it into a lesser order matrix ,i.e a 2x2 matrix which is then solved by 'ad-bc' formula. Now...
  10. H

    ECAT and MCAT Preparation: Post your doubts here!

    Oh you talking about chemistry? yeah nobody does those two chapters.
  11. H

    ECAT and MCAT Preparation: Post your doubts here!

    Lol no. You cant afford to skip Conics. The 7th chapter is not that important though.
  12. H

    ECAT and MCAT Preparation: Post your doubts here!

    The answer is -6 You see in such questions, you can end up wasting most of your time if you dont think wisely. 1st expand by 1st column. Since there is only one non zero entry in it, it'll be easier. After expansion you'll get a 4x4 determinant. now expand by 4th row, because of the same reason...
  13. H

    ECAT and MCAT Preparation: Post your doubts here!

    I thought it was C but according to google it's A. I asked a teacher, he says that both options could be correct but he'd go with A.
  14. H

    ECAT and MCAT Preparation: Post your doubts here!

    Lol i know you'll think this is weird but i'm an Fsc student. :P But i took additional mathematics courses :)
  15. H

    ECAT and MCAT Preparation: Post your doubts here!

    Or if that's confusing you, open up page 105 of Fsc part 1 mathematics book. The properties are listed there.
  16. H

    ECAT and MCAT Preparation: Post your doubts here!

    Lol i'm a girl :P anyway http://tutorial.math.lamar.edu/Classes/LinAlg/DeterminantByRowReduction.aspx Try this link out. but in this link they simplify the determinant by row and column operations and then expand as you've learned. What i did was make one whole row equal to zero. Whenever a...
  17. H

    ECAT and MCAT Preparation: Post your doubts here!

    Lol that is not mentioned :P but anyway thanks.
  18. H

    ECAT and MCAT Preparation: Post your doubts here!

    Yeah i get it how the answer could be A. But capaciatance also depends on medium which makes the option D correct as well. =/
  19. H

    ECAT and MCAT Preparation: Post your doubts here!

    Ah right! K then choose from the given options. A: more on smaller sphere B: more on larger sphere C: equal on both D: depends on the nature of material of sphere. It could be both D and A :/
  20. H

    ECAT and MCAT Preparation: Post your doubts here!

    Equal charges are given to two spheres of different radii. What should be the potential on both? Equal, right?
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