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P.H.Y.S.I.C.S P2 D.O.U.B.T.S CIE

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The SMA:
need help m/j 2007 p2 Q6b

astarmathsandphysics:
To find the dross section area of metal

sizbeauty:
hey can sm1 plz tell me tht in nov09/variant 22,q4(partc2(ii))
frm where did v get 0.0362????
2 ?ES = ½ × 1.8 × 10-2 ( 0.0362 – 0.0212)
= 0.077 J


plz sm1 help me!!!! ??? ??? ???

sabrina:
hi
i have doubt in O/N2009 var2
q2bi
shouldn't it be like
for 10.7= 6*10^23
      1   = x
n then cross multiply?
i have attached the paper

sabrina:
n also the separation one. someone plz explain

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