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'4 đim.=N{&4:<&=+C&<1W=l&=C<B WT$X&[B4:<,TC ! 7 8 '<M$4a7<M&6[37 <MN,C0$,6W.V+,C,-W?0:&6[3 y;]#z7(+U<X<gWT !  8 ;8VG4&,{&C& ,}f&=?X(J=;!78<'=~V.N,XZL<b <1W[+<+ 8 L&=N&=_<,dW&K00W)B<0:{& ,}\-VZ,}2a<-W<+4:<&=+<1WG3<,C&=WZ-[B<•4:<[KW0 ! ;#7EF[G •4:<)a'<B,}.7&3<,C&=WZ-[B0 8 &MZ&WC<-VZ<b,}'0 8 ~0 ! .GR&&=W&=f< <b !  8 C&0K<f<&*W+&+GPX&=I:l&<b0 8 G € H, tên th sinh GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG\ S bo danh GGGGGGGGGGGGGG\ S CMND ••••GGGGGGGGGGGGGGGGGGG Đ THI CH&NH TH'C m 1 m 2 m 3 k 1 k 2 k 3 O 1 O 2 O 3 r S 1 S 2 ! A  − 8 A  A  9 A  Chữ k gim thị 1 •••••GG•••••G\ Chữ k gim thị 2 ••••••••••••GGGGGGGGGGGGGGGG   HƯNG DẪN CHẤM Đ THI CHN HC SINH GII LP 12 NĂM HC 2008 – 2009 Môn: VT LY - Vng I Nội dung Điểm Câu 1 (6 điểm) 1,5 1G‚ ! ;‚ 8 ;‚; ! ! m k ;8#=VF[ c& ! @ ! ;9<+['8#&u 8 π .'<. c& 8 @ 8 ;!7]<+[8#&'<. #7] #7] #7] 3,0 2G !  8 ; 8  9 ƒ 8 9! 8 xx x + =  Z@ 9 ;8@ 8 „@ ! '!. ƒ+,C<b 9 &…5$<b8V+ ,C,-W?<M$4a7<M&6[3N ‚ 9 ;‚ƒ( 9 ;"#F M$4a$X$U,T†=>>  .'8 !89 AAA  −+= YU,T[WZ= r 9 ; 8 ! 8 8 .8' AA + ;9 8 < ‡ 9 ;mFE=V ƒ@ 9 ;9 8 <+['8#& E π .'<.\0 9 ;@ 9 t;/# 8 ['8#& E π .'<F[. &;#ƒ@ #9 ;9 8 <+[' E π .;9<\0 #9 ;/# 8 [' E π .;/#<F[ 1Z7,6W(w+ 9 @W3V4:9<=T&=WZ-<+B01 &3</#<F[4:@W3G #7] #7] !7# #7] #7] 1,5 3GS+U<X< ! 0 9 V; 8 9! 8 !9 .' Oxx +− ˆw&@;@ 9 „@ ! C&V+,C,-W+<B $4a&=PVH @;r<+['8#&u‡.GM$4a$X$U,T †=>> .' !9 AAA  −+= r; # 9! 8 9 8 ! !9]<+[8 AAAA −+ ;9 ] < V; 88 E 8#<+[']9' ++ ϕ t #7] #7] ! A  ! A  − 8 A  8 8A  9 A  m 1 m 2 m 3 k 1 k 2 k 3 O 1 O 2 O 3 x O ƒV s@; 88 E.]9' + n‰7"!< #7] Câu 2 (6 điểm) 1,5 1GŠc&V+,C<BVH‹;‹ # <+['‚&u‡. Œ & ;j'!„<+[‹.;8j[ 8 '‹F8.nj‹ 8 F8 Œ & ;Œ<+[ 8 '‚&u‡.; .8&<+['8 88 Œ ϕω ++ E 'Œ;j 8 # α F8. Œ V ;0 8 F8  ;j 8 '‹t. 8 F8;Œ[ 8 '‚&u‡.; .8&<+['8 88 Œ ϕω +− E ƒŒ & 7Œ V R&N&W6+0:&6[3B<‚t;8‚ƒt;F8 ŠŒ V ;Œ & ƒ<+[ 8 '‚&u‡.;[ 8 '‚&u‡.ƒ ϕω 8&<+['8 + ) = 0 ƒ8 T π 8 &u8‡; 8 π u(mƒ&; EE .8 8 ' T k T + − π ϕ π S+U&g6N&R$,Co;&Ro |&;& (u! „& ( ; E T #7] #7] #7] #7] 1,0 2G;8m g l ƒj; 8 E π g  8 \jt; 8 E π g t 8 ƒjjt; 8 E π g ' 8 t 8 .ƒ#79/; 8 E !# π ' 8 „'„#7E. 8 .ƒ;8[\ j; 8 E π g  8 ;! #78] #7] #78] 1,5 3Gf0+Nv<WZ* ,C&=?,-W0V+,C ,-W? ƒ`l&01&V+,C,&Y'[;#.,Rt'[; rF8.L&<WZ*,C&=?,-W&=N<WsG &; π π 8 /F ; !8 T n#7!/‰[ 4a&f  &`l&,&YrF8&:r &t; π π 8 9F ; / T n#7999[ #7] #7] #7] 1,0 4Gjujt; 8 E π g ' 8 ut 8 .\jujt; 8 E π g 8 E T ƒ E ; 88 •TT + ;87][ !7# 1,0 5G^<-WV4a&>+<-WB<v<‹Gc4a&=P,Cf< ^< c 8  [‹cj[‹;'uj 8 .‹tt ‹2 [‹n‹ƒ‹ttu " Ž G  g G‹;# ƒ ] ; Ž " ; 9 8E n!7""/[ #7] #7] Câu 3 (4 điểm) 3<,CV<bC&,*l&(•0K  0;ωxG S<?•0I&=Jl&(•&=N0KB<g v 0 TC ϕG s M O A A/2 N A O’ 6[3XZ&W ,45< y; # # <+[ ! v v f ϕ + &6[3Z$_&WC< X&=IB<‡G‡^ WTK=@XZ &W045<H‡&M WTKH6 XZ&WG 6[3<f<,H&W,45<(<+[ ϕ ;!‘C&&R$&WZR 0 v 45<<-W TC Gy @ ; # # F! vv f − 4a&f&6[3<f<&*W y  ; # # F! vv f + C=C<bVU&6  ∆ y;y @ y  ;y # G 8 # 8 # F! F8 vv vv − ; 88 # ## 8 vv vvf − &Z[3 0 8 u/"##0„!!]/##;#‘0n!‰F[ ω;0Fx;!‰F#7];9E=VF[ #7] #7] !7# #7] #7] #7] #7] Câu 4 (4 điểm) U[q$4a&=PV+,C<bWT<BVH W ! ;W 8 ;r<+[8my& ^s&=W,* !  8 G c4a&=P[BV+ ! &=WZ-,Rs  W !s ;r ! <+[8my'& ! v d . c4a&=P[BV+ 8 &=WZ-,Rs  W 8s ;r 8 <+[8my'& .' !8 v rd v r − + . 0 8 ~0 ! ƒW !s [:$aW 8s ƒCv<$|‡;8my'& ! v d .8my'& .' !8 v rd v r − + . ƒ|‡;8my' .' !8 v r v r − Hs0K<f<&*Wƒ|‡;'8(u!.m0:(;#7!787•G .' !8 v r v r − ; f k 8 !8 + &Z[30 8 ; 8 /7# +k 0 8 :l&‘(2l&;# 0 8 s@;#79F[G #7] #7] #7] #7] #7] #7] #7] #7] ‡    v  . Đ THI CHN HC SINH GII LP 12  NĂM HC 2008 - 2009 Môn:VT LYVngI  !"#$%&'()(*&+, Đ thi gm. ••••••••••••GGGGGGGGGGGGGGGG   HƯNG DẪN CHẤM Đ THI CHN HC SINH GII LP 12 NĂM HC 2008 – 2009 Môn: VT LY - Vng I Nội dung Điểm Câu 1 (6 điểm) 1,5 1G‚ ! ;‚ 8 ;‚; ! ! m k ;8#=VF[ c& ! . đim.w$C&K2P&=?<BX(Jx;]#<<B`C&<X<W),v 2$X&=C&K<B& ;6 [3y # ;!(zG+KdWZ,-WdW&=_<<3,I,dW&K00W)B< 0:{&<bKGsXZ&W,{&<3,I&=+{&$O<DK'4L+$ 6 Vv&J< K.&W,45<K<B& ;6 [3L&=+VU& ;6 <B,C=C|y;!##zGP&3<,CB<<bKG+ &3<,C&=WZ-K&=+()(J0 # ;9E#F[G Câu