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Search results

  1. arshadphysics

    lol !!

    lol !!
  2. arshadphysics

    what about yours ??

    what about yours ??
  3. arshadphysics

    what about exams ??

    what about exams ??
  4. arshadphysics

    physics november 2012

    what answer was iy then ?
  5. arshadphysics

    physics november 2012

    i just got an idea !!! why dont we post our answers here during after the exams ?? right !!
  6. arshadphysics

    physics november 2012

    the last question in the paper ?
  7. arshadphysics

    physics november 2012

    which answer have you got for section B number 11 part a ??
  8. arshadphysics

    Add Math help!

    okay for the first part : it is like that : the position A and B is like that A---B or -A---B or --A---B which make 3. Okay. Then arranging A, B is 2. Then total arrangement is 3 *2 and the 5 boys can permute themselves which makes 5* 2 * 5!. then the second is really confusing. You must not...
  9. arshadphysics

    Biology; Chemistry; Physics: Post your doubts here!

    delta V=V-U=-22-25=-47 m/s
  10. arshadphysics

    Biology; Chemistry; Physics: Post your doubts here!

    As you know work done= force * perpendicular distance. If you just look at the June97 question 9 its basically the same thing. So work done against friction= the distance* frictional force which is equal to= 3*100=300J. Thanks
  11. arshadphysics

    Post your physics and chemistry o level problems

    Post your physics and chemistry o level problems
  12. arshadphysics

    Biology; Chemistry; Physics: Post your doubts here!

    The answer is in fact C since when calculating the number of moles of chlorine of metal X as follows : 10*0.05/1000 = 0.0005 moles and the number of moles of silver nitrate is 10*0.1/1000 = 0.001. The valency of X is 0.001/0.0005 which is equal to 2. By cross multiplication, the formula is XCl2...
  13. arshadphysics

    Biology; Chemistry; Physics: Post your doubts here!

    No in fact the answer is C since the perpendicular distance between the line of action and the pivot is largest. Ok.
  14. arshadphysics

    Biology; Chemistry; Physics: Post your doubts here!

    explain why an electric bell work when connected to a low voltage a.c supply instead of a battery ?
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