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  1. S

    Phy n Chem PRACTICAL IR

    anyone???? :oops:
  2. S

    Physics P1 Questions

    for q 25 since da formula for difraction grating=> a sin@=nxwavelntgh(a is seperation) a=1/300000 = 3.33x10^-6 now when ever we have to find da totlal number of orders of difraction "n" we put @=90' => 3.33x10^-6 x sin90 = n x 450x10^-9 =>n=7.4....therfore total orders of difraction wud be...
  3. S

    Physics P1 Questions

    for q 21. wat da q asks is to find extension or compression/original lengh x100% since extension or compression / lentgh = strain...therefore we first have to find strain. calculate da area = pi d^2/4 ....then calculate stress ie force/area now calculate strain = stress/yung modulus now da...
  4. S

    Physics P1 Questions

    FOR q20 assume dat the line till P from origin is a straight line... since strain energy stored is= the area under the force extension graph the area below the straight line ( strain energy)= 1/2 x 2x10^-3 x100= 0.1 J (convert mm into m) now since we have underestimated da total area below da...
  5. S

    Phy n Chem PRACTICAL IR

    does anyone have any information about da IR report for phy n chem practical paper33 2010??? if so then plz post wat u knw!! :)
  6. S

    Physics P1 Questions

    for Q8 first remember dat da momentum needz to be conservd n the momentum b4 collision = 2mu-mu=mu so da momentum after collision shud be mu. this is in option A n C .( option D is wrng as shws da result of inelastic colision) now remember dat reletive velocity of aproach = reltive velocity of...
  7. S

    PREDICTIONS A2

    mathz iz easy....da only thing dat i find hard iz chem aplication as our teacher knw nuthin bout it:P....
  8. S

    PREDICTIONS A2

    watz so hard in vectorz?.....itz da only thing in p3 dat i luv das most!
  9. S

    Chemistry Applications

    dude the 12 pointz r useless!!! i dont think they r meant to be memorized!! DO U?
  10. S

    Trig Identities Maths easy.

    change cot@ n cot 2@ in cos@/sin@ - cos2@/sin2@ =cos@/sin@-(1-2sin^2@)/2sin@cos@ (open cos 2@ n sin2@) =(2cos^2@-1+2sin^2@)/2sin@cos@ =1/2sin@cos@ (sin^2@+cos^2@=1) =1/sin2@ =cosec2@
  11. S

    prctcal guess!!!

    anyone having guess papers for phy n chem p33.....plzzzz!!!!
  12. S

    practicals.............

    princesszahra plz plz PM me too!!!! need help on chem n phy prcticalz!!! plxx1!!
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