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  1. S

    Physics: Post your doubts here!

    How do we do these graph questions? :@ Fb is 188 N. I've also attached the question paper! http://onlineexamhelp.com/wp-content/uploads/2014/08/9702_s14_qp_21.pdf
  2. S

    Physics: Post your doubts here!

    It's 3.5 so they've rounded it off to 3. :/
  3. S

    Physics: Post your doubts here!

    How do we do this? :'(
  4. S

    Physics: Post your doubts here!

    Guys please help me out in the last part of this question!! It's drawing the graph. The answers to the previous parts are: 2 b ii) 12.4 seconds and velocity is 1.61 ms^-1 Please helpppp, I drew something but I am not sure if it's correct. Also, any tips when it comes to drawing graphs like...
  5. S

    Physics: Post your doubts here!

    Guys please help with this question!!!! PLEASE. A ball is thrown with an initial velocity of 20m/s at an angle of 30 to the horizontal. Calculate the horizontal distance travelled by the ball. I've found the horizontal and vertical components. Vv= 10 m/s Vh= 17.3 m/s I can't seem to figure...
  6. S

    A level Biology: Post your doubts here!

    Hi guys! I need some help in paper 3. Firstly, Can some one please tell me how to calibrate the eye piece graticule thing with the stage micrometer? Also, do they ever ask us to actually calibrate one using a microscope? Or do we just need to know how to do that on paper??
  7. S

    Physics: Post your doubts here!

    Hi guys! Can some please explain observing stationary waves in an air column? both open and closed? Like what are the points we need to keep in mind for that? Also, stationary waves and musical instruments, do they even ask questions on harmonics? Ughhhhh, any help would be appreciated.
  8. S

    A level Biology: Post your doubts here!

    How do we solve this??? Correct answer is A.
  9. S

    A level Biology: Post your doubts here!

    How do we solve this? Correct answer is B.
  10. S

    A level Biology: Post your doubts here!

    Also, this question, please! Question 28. Correct answer is C.
  11. S

    A level Biology: Post your doubts here!

    Can anyone please explain this?? Correct answer is D.
  12. S

    A level Biology: Post your doubts here!

    Waittt, how does 23000 equal to 100? :s
  13. S

    A level Biology: Post your doubts here!

    Can someone explain this question to me? The answer is C.
  14. S

    A level Biology: Post your doubts here!

    Does anyone out there know how to solve this? :'( Correct answer is A.
  15. S

    A level Biology: Post your doubts here!

    How do we solve these annoying eco system calculation questions? -_____-
  16. S

    A level Biology: Post your doubts here!

    Here's the link! http://www.mrsmbpj.com/IGCSE/pdf/9700_w12_qp_11.pdf
  17. S

    A level Biology: Post your doubts here!

    How do we solve this? PLEASE HELP ASAP! Correct answer is A.
  18. S

    A level Biology: Post your doubts here!

    Guys, how we do solve this?? I NEED to do well enough to get atleast a 30 in paper 1 :'( which seems almost impossible! -_- How do we solve the 4th one?
  19. S

    Chemistry: Post your doubts here!

    So 0.5 for a thermometer and 0.05 for a burette right?
  20. S

    Chemistry: Post your doubts here!

    Isn't the maximum error 1 in a thermometer?
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