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Recent content by pratikdahal

  1. pratikdahal

    A2 Physics | Post your doubts here

    On Fig. 4.1, mark a position of the pivot P for the piston to have (i) maximum speed (mark this position S), (ii) maximum acceleration (mark this position A). N/B : Please give the explanation for each case !!! :)
  2. pratikdahal

    A2 Physics | Post your doubts here

    okay..and on the decreasing part of the graph(V against x) ..would the gradient would be a curve or a line with positive gradient??
  3. pratikdahal

    A2 Physics | Post your doubts here

    how to plot this graph?? :/
  4. pratikdahal

    A2 Physics | Post your doubts here

    since the mass is removed..the system oscillates with even more amplitude than before..but this makes the wavelength go small..!! you can try this question with a thin ruler yourself at home... :D (it worked for me)
  5. pratikdahal

    A2 Physics | Post your doubts here

    If 'Ep is max at amplitude' then shouldn't the graph be like cos(x)..?? :).. but being above time-axis...!!
  6. pratikdahal

    A2 Physics | Post your doubts here

    can anyone clear away my confusion in this question?? M/J 2004 question 4 (b) (paper 4) )
  7. pratikdahal

    A2 Physics | Post your doubts here

    nice one ..and i got the answer to that question !!!
  8. pratikdahal

    Chemistry: Post your doubts here!

    Yeah..got it..thank you! :)
  9. pratikdahal

    Chemistry: Post your doubts here!

    there is this "Upload a File" down to the text box in which we type comment.. click on it and browse to the required destination of "your" file..and simply click 'OPEN'...it will get uploaded i guess :)
  10. pratikdahal

    Chemistry: Post your doubts here!

    and can you tell me how the two graphs would look like?? :D
  11. pratikdahal

    Chemistry: Post your doubts here!

    Can anyone kindly explain how to sketch in this graph question..and explain how it tends to be so.. :)
  12. pratikdahal

    Chemistry: Post your doubts here!

    Can anyone please help me out with this?? :) November 2008, Paper 4, Question 2(b).
  13. pratikdahal

    Physics: Post your doubts here!

    I I am sorry, 'cause i don't get how come "9/10 of manganese is reduced to its 1/10th value to form 9/10 of iron"?? can u just elaborate a bit more :)
  14. pratikdahal

    Physics: Post your doubts here!

    It was very helpful....!! :) furthermore, how can we calculate the time at which the ratio of (mass of iron-56) / (mass of manganese-56 ) is equal to 9.0 ?
  15. pratikdahal

    Physics: Post your doubts here!

    no idea about this question .. :( please help me with this !! thank you in advance :)
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