物理答案(2)

)*+,-.!#$#%/!#01234!#$%&'(56789:;!!#'($&#<=$!$%&'()*$%&'()+%',-&./0123456789:;<9=>?@%(AB!#0CD789E)#%;<9E#%*%F(AB0CDCB9E#%*+)#,!%%&GH&,$,!-%I###%)#%)JK!-D)./%0,-&LMN4OP;)(%FœE),()%8;š±²#$,#!=##%./³´²#$,+6%#!,$%µ槡$####+6!!#!!#¶·²##,#!I>#!=>##,#+6%¸²D(<#+,#+6++6,+6%0,-&¡¢D§槡####!#+6*¨©­e¹aDº»E#&,##,%*,$,%·²#&,%3GH!#槡$*!#'($3#<=$§¼½ˆ¾¿À)ÁÂ%I°­ÃÄyÅ%€TmyŒv%',-&Ƽ½-ˆ)©ÇÈÉÊËÌ%-ÍΰÏ%!ÍÎÐl%I(?ÍÎÐl%.Æ-D¿À)ÍÎÐl%&0,-&.½°­¾°3Ñ´y/%Æ$(?(-..Òiˆ)©ÇÈÉÓËÌ%XÁÔÕtÖ?@*0,,,%qC12ÍÎ¥S%I0ÍÎÐl&1/121/2/”M%I(?ÍÎÐl%3GH!!!!!ÊÓ@!#'($0#<=$X×ØyÙÚM3^§Û%×ÜÝÚM3^!$$Û%?@Þß7àá3,*$1A!./,#$3,!$$$%#',-&lâã䚜á4#,!'%åæWœá5#,@=!>@!*,!#!*B%7çWœáE6!œá¦èåæœ#á*!$4!,4!>#=!#!*%·²4!,#!*'%I7!C7#,4#C4!,#C*%I&,-&X&éêëì?@%í68,!!#$%&'(!!!!##$书#7!6D=6##,6!%°MïðDñòœá‹S%I0GH&óô¬èõ°ó“¯%6#Ðl%Âö7÷7##968Ðl%A%ÙW7ï>š%A%Ù7ß4,%?@7ߥS%Fø%Ù7ßùy«¥S%3,-!6!=685!#'($&3%##<=$Èúûüý&þG3^ÿ!%F&#+&!,7=#%qC7,$'!'#'%'+%·²#,%7,$'!'#'#7=%#!#!#%'+%ËûüDÿ!uvE#,,%7,$'!'#'%'+%í7,$¯%#,7(8%7,!¯%#,7(8&È:7=%5!#úûüý&þå3^ÿ!%F&#+&!,7=#%qC7,$'!'#'%'+%·²#,%7,$'!'#'%'+%Ë#7=!#!#!#ûüDÿ!uvE#,,%7,$'!'#'%'+%í7,$¯%#,!#7(8%7,!¯%#,7(8&7,#¯%:7=!*#,7(8!F'0,-'&3GH!%E!#'($&0#<=$ÈÉËÌ%X#$%&?@!E*F%I2/'vE槡#6%ËG3ÖW'vE!E#6&‚1$D()tvE8;<2,8;<*F%I*$á7##&+îÿ!¯aE,,槡7槡;E槡#6E槡#67!@6,,#%éêCD,ú”P-.¹|%/è''3,-%&'0GH!#<<<7)!#'($&3!>#%##<=$01®27÷E=,!%%X‘3%&?²*!$=&,$=#%qC&,#7%²#,$!*7(8%&GE6==#$!H&?,,!0%',-&X‘3%&?²!$=&,$=>4%%9,46%45?²9,$!#*G%0,-&(6==E!!$=!$=>#E!#!œE)(,>#,#$!#*H%./œ(%&@,)(+#+$>#%,$!!#*H%@6,@,###$!$@#*H%3GH!!$!#'($'03#<=$Ó­P67Dc89:%IÓ;>ò$uv9S%F°óDE!!'!#%c?3^:–‘3^D=t©>E%!'%#%FZ%!$%#%./‘’h“@A*uvV–‘3^=t&:c?V–‘3^=t%%&56IJ<&,#IJ<%%?²&!$&#%B+E&!,!!=!%&#,!#=!%Ë?²!!$!#%&,-&01>aDº»E*$%12:2/DŒvCxE*%§Û‘!#!#’h“D¯a©>E,!:,#%ª«3^¬X­®h“%Z$,!,*$=*%$,#,*$=#*%§DÁ*?²##,#*$=#*,%#%Ë?²,#%#,!%0GH&E012,2/%0F;>–‘’ò­P2¯%–‘c?E,!槡*$=*&#&;>2!&%F­P/¯D–‘c?E#&%F?²9:8%!,%9:8%#,%Xéê>©Ç?@%!$%#%²$%;>2;>/;>/#Ë>2V>/aDº»%&56#;>2$;>/%3GH!!!!#'($!#'!###!$!%!$×`#©##<=$!#./ÉG%í¦uvÂTH¯%ŽD™)”ÂTH%IJK‘3LM)%Ié'&#(K#!$###./NO!Pš±Z#(+(K,A-%?²-,)(+%,QÉÓ?²0,,,%?²%AAA5!$+!!$%lRD;V2(opqrs!#7(8#<=$!#''>¢$N4C“<:(<=>%F>#!,'##!#©#!#!#+,>#!='##!#©###·²##,E7(8%+,)@H!#©###0Æ>DLM)3!,'#>$,E?!!©#e7Æ2D‹StLM)3#,'!'=>=2#$,E?!!©#3!,3#%uJv°w2€Ttx…†!0%!,E7%%#,*!#*7%!E•N,!U%'h“¾yz{€*,!,,8,!8##E!8¯'2rsi|Py}*'##,'=2##%!!©#·²#%,7(83!E##$&!8N4%>D¦uvSl*-!,,7(8,#7(8>!#h“Dc?&!,#!,!+-!,!,%7#!8¯>DuvSl#,#!+-!,!,#7(8!8¯>¾~z{Dº»E*&#,%#+&!,*!#*+%7,#!#*73!=3#E=E##!8U>D¦uvE-!%''2D¦uvSl-#,,7(8,7(8!!©#'=2!#!#0€•N,#U%>¾~z{%FZ*#,#+-!,#=#%,#+-#,#,&#!!©###·²,#,$!*8‚y·!!*8%îƒ>V2Duvx„•ÐE$%I…†#/è*>V2(opqrs!!©#$!*8¯%>DuvSl#*,#+-!,#,!7(8%'2Ÿ®Duv*#@,+#%=-#,#,+#7(83^–‘^y#>2¹arsE¢‡rs*>#*='=2##@,>#5='=2##E!!©#!#!#!#!#>#*='=2##@,>#5='=2##E!!©#####·²#5,+#7(8%#E,!7(8%F>rUDuvSlE#7(8!!©#!!#$%&'(!!!%##$ˆ*X'=2,>%>V'2Ÿ®pq¢‡rs%rUuvމ%Š#5,+#7(8%#E,!7(8ù?²%©###$$###$!##$!*!#'($!#!+!6!##!E,+&!%#%+*#D6##D66槡>D#<=$!#./#$%&?@;BP‹%¼|h“DjkùE6%I*##$D#$>$,!!©#6#$·²>$,!!©#D6ÉÊC‹%¼|Œ¨©EŽ‹l‘%X#$%&?²û7’E*!!F,#$6#+6)6!!©###$#·²F,+!6!!©#####;BP7C“‘’h“”•–P1%0;BÒ7¯c8D—˜E&%E#IZ*+&,#$,!!©#!+D+E,,#!!©##+D#·²E,+#&!!©###$###$!™+6%+6#µ¶²+,%E,+&#!#©#D66%#0Ñ´;BÒ¶7¯Dc8V&þDº»E*%I;B;1¶$!yš›ÊDuv*#&,#$!!©#+D*#E,#*,##$%qC$%*6!!©#槡槡6;BÒ¶!yš›Uh“ÈÉÓËÌ*Ó#$X#&œqDjk=&,!!©#>D#E#$**#EœqDjk*=E,,#,#=&%qC$%=E#=&!!©#>D>D槡6槡6#$./³´*ËZ;Bx«mPžŸ è%uJËZ¼_¡(­PžŸ è%I1/,!!©#>Dí#E,$¯%=E,$;BmP5*/5,=&!!©#í#E,##$¯%=E,#=&;BmPG*/G,槡*+##=&!!©##$IpŸ'v%,/5+/G,%+*#=&,%+*#!!©#槡槡>D,!%#l³Šq¢Q›3£²òGH,úm¤²©-!!#$%&'(!!!##$