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  1. U

    math p3 help!!

    Can someone help me with math p3 oct/nov 2007 question 10 for vectors. how to find r?
  2. U

    physics ppr 4 helpp please

    I need help with a graph question o/n 2009 42 question 3 part (c)
  3. U

    Physics paper 4 helpp!!

    ok i got part ii and iii but can u explain how is current proportional to magnetic flux? is there a formula? thanxx
  4. U

    PHYSICS PPR4 HELP PLZZZ!!!!

    june 2005 q7 part c mass of iron/mass of maganese=9/1 so the ratio is 9:1 and the total is 10 using the formula N=N0*e^-lamda*t u already knw lamda frm b(ii) so when t=0 N0=10 and when t=t(unknown) N=1 so 1=10*e^-(7.4*10^-5)*t 1/10=e^-(7.4*10^-5)*t ln(1/10)=7.4*10^-5*t...
  5. U

    Physics paper 4 helpp!!

    may june 2005 question 6 part B) i,ii and iii
  6. U

    Physics paper 4 helpp!!

    can someone please help me in physics paper 4 questiion mayjune 2005 part (b) (i), (ii) and (iii) please help, i dont understand the graphs.
  7. U

    can any one please help me with this phy p4 question

    This is what i did hope this helps: from P---Q the work done was already calculated in (ii) so its 240J so according to the formula Increase in internal energy=work done + heat supplied so for P----Q Increase in I.E (u) is 240 (the work done) - 600 (the heat supplied) = -360 (internal...
  8. U

    Math p3 help

    thankks!! It helped a lot
  9. U

    Math p3 help

    Hey I need help with mathematics p3 november 2008 question 8 differential equation.
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