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  1. B

    Physics: Post your doubts here!

    Yes but it is like this. Rise = Final - 40. Why is 40 counted in this?
  2. B

    Physics: Post your doubts here!

  3. B

    Physics: Post your doubts here!

    Why not B?
  4. B

    Physics: Post your doubts here!

    Yes as that represents the distance YZ. If area changes then we have actually changed YZ which cannot happen.
  5. B

    Physics: Post your doubts here!

    Sorry. Read All XZ as YZ. I was talking about the Flat area. Distance YZ is constant. If speed is high then YZ is covered quickly so t is less. If speed is low (after rebound inelastic) YZ is covered in more time. You must also compare area under vt graph. YZ is constant so area must remain...
  6. B

    Physics: Post your doubts here!

    I don't know how to differentiate between A /B. Anyway Volt is defines as Joule per Coulomb. 9 V = 9 Joule per coulomb. So 1 coulomb of charge carries 9 Joules.
  7. B

    Physics: Post your doubts here!

    Distance YZ is constant. If speed is high then YZ is covered quickly so t is less. If speed is low (after rebound inelastic) YZ is covered in more time. You must also compare area under vt graph. YZ is constant so area must remain constant.
  8. B

    Physics: Post your doubts here!

    What is the answer? A or B?
  9. B

    Physics: Post your doubts here!

    More current = More brightness Since if you open switch then current will no longer be divided so the current flowing in the main branch will increase. Main branch is branch containing b1 and b2
  10. B

    Physics: Post your doubts here!

    Delta L is amount of compression. If amount of compression is high then length of object drcreases.and vice versa.
  11. B

    Physics: Post your doubts here!

    Fom 12:00 to 12:30 distance coveref is 100 miles From 12:30 to 1:30 distance covered is 200 miles. Total distance covered = 300 mile so outside of range of cambridge Remaining distance to covere = 80 mile but we only have fuel for another 50 miles since fuel for 300 miles is used up so emergency...
  12. B

    Physics: Post your doubts here!

    The graph is a decreasing gradient curve. you can see at the end there is less change in angle for an increase in current. That means for high current there will be less deflection. Less desflection means that the values will be close together at the end. at the beginning there is more change in...
  13. B

    Physics: Post your doubts here!

    Tension in XY = 4N Tension in XZ = 4N Extend the line of P so that it crosses through the troangle. It forms 2 right andle triangles. ANgle between Perpendicular and Hypotenuse(XY,XZ) can be found by Sin Theta = 40/50 angle is 53.1 Force of XY in direction P = 4 cos (53.1) = 2.4 Force of XZ in...
  14. B

    Physics: Post your doubts here!

    take 15 cm scale. measure your head dimensions. fFind volume Profit..???
  15. B

    Chemistry: Post your doubts here!

    Yes Kc is only affected by Temperature. http://www.chemguide.co.uk/physical/equilibria/change.html
  16. B

    Chemistry: Post your doubts here!

    Why not B? Answer is C
  17. B

    Chemistry: Post your doubts here!

    All will make aldehyde or carboxylic acid but which one is the one with low BP?
  18. B

    Chemistry: Post your doubts here!

    Yes but plz explain
  19. B

    Chemistry: Post your doubts here!

    ???
  20. B

    Chemistry: Post your doubts here!

    Is D flipped?
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