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  1. umarashraf

    Physics: Post your doubts here!

    waooo...::P:P
  2. umarashraf

    Chemistry: Post your doubts here!

    hmmmm ... still a mystery for me...:)
  3. umarashraf

    Chemistry: Post your doubts here!

    addition of hydrogen or oxygen are not the best of the ways to check redox reactions mate...
  4. umarashraf

    Chemistry: Post your doubts here!

    I still have problem with the word OXIDATION.... if C has an oxidation state of +2 in CO then +2-2=0.... and CO2= +2-4=-2... it is still reduction not oxidation.... and if C has oxidation state of +4 in CO2 the +4-4=0... its neither oxidation or reduction.... there is no way in this world you...
  5. umarashraf

    Chemistry: Post your doubts here!

    I still have problem with the word OXIDATION.... if C has an oxidation state of +2 in CO the +2-2=0.... and CO2= +2-4=-2... it is still reduction not oxidation.... and if C has oxidation state of +4 in CO2 the +4-4=0... its neither oxidation or reduction....:P:P:P:P:P:P
  6. umarashraf

    Physics: Post your doubts here!

    object moving in a circular path experience a so called centripetal force.... they why objects leave the circular path making a tangent to its position of release...??? rather it should fall toward the centre...????
  7. umarashraf

    HELP!Which university is right for me?

    country....???
  8. umarashraf

    Physics: Post your doubts here!

    i think there is nothing as such thing mentioned that the counter has no background radiations.... so we can necer be certain....
  9. umarashraf

    Mathematics: Post your doubts here!

    permutation n combination mein waqa koi logic hoti hai hai kia....????:)
  10. umarashraf

    i love the way you lie..

    i love the way you lie..
  11. umarashraf

    Mathematics: Post your doubts here!

    gradient of line AC is 0.5 and its equation is 2y-x=-1 gradient of line bd is -2 and its equation is y+2x=12 intersection of the two lines is the point M....
  12. umarashraf

    Mathematics: Post your doubts here!

    oh right ... yeah its x=4...
  13. umarashraf

    Mathematics: Post your doubts here!

    where have you seen this question by the way...??? can you share the link of it...?? if possible...???
  14. umarashraf

    Mathematics: Post your doubts here!

    put the derivative equal to zero.... i think its x=4...
  15. umarashraf

    Mathematics: Post your doubts here!

    do you have the answer of it..???
  16. umarashraf

    Chemistry: Post your doubts here!

    welcome sir... hey in fact i thought CO2 was formed by oxidation ... i just discovered the answer today after your post..:)
  17. umarashraf

    Chemistry: Post your doubts here!

    in carbon monooxide, oxidation state of the whole compound is +4-2 = +2... and CO2 has oxidation state of +4-4=0... so CO2 is formed by reduction not oxidation.... :)
  18. umarashraf

    Mathematics: Post your doubts here!

    most welcome
  19. umarashraf

    Mathematics: Post your doubts here!

    yes mate.. 100% correct... by the way you have opted a long method of solving the second part.... result of first part is 32-80y+80y^2... if you compare second question with the first, instead of 2-y it is given 2-(2x-x^2)... y is in fact replaced by (2x-x^2) s just replace y with (2x-x^2)...
  20. umarashraf

    Mathematics: Post your doubts here!

    mate its a right angle triangle with angles of 90, 36, 54. (hope you know how to convert angle from radians to degree) to find area you just need to know any two sides and a angle between them... one length is given as 10cm ... find the length of x or y...(up to know)... then put in the area...
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