2021年河南省中招物理模拟试卷一（附详解）

《2021年河南省中招物理模拟试卷一（附详解）》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

2021
ᓭḕᱥᳮᔁ11.ᜧ᪶ஹ□᪶“”ᡈ“#”$%&஺()⁚+,-./0)□12ᘤ□12ᘤ4⌕67Ḅ9:;<2Ḅᑁ஺2.>?ᑁḄ@ᱥ#ABCDḄEF᧕“Hᕡ”JKLMNᑖ᪆QRSTUVWRSXF᧕&ᙠ⌱“[\]”ᡈ“[^]”$஺3.ᓅ9`abcᑁ,☠“ᨨf”gᨨ஺“hf”ᵨ2jklmḄᱥno(2Ḅᜧqᵨᜩᯠftu᯼jwᧇᩭz2<1o(ᜩᯠfḄ{|}~ஹ஺4.᝞ᡠᡃḄ-Wᐹ∉஺ᱏᑴᡂↈ#Ḅᙠᢥjᡂ)∉஺ᵨ¡¢£9ᔣᤍ¦§¨¡∉©ᓣ஺ᵨᤍ«©¬¦TU;®∉ᓣḄḄ¯ᱥ°᝞ᡠ15LḄᙊ²ᛛᧇ᫜0µ2ᙠ᫜Ḅ⚔·/0¸¹ᵯ¦»2ᘤl¼½᳛(5W,¿ÀᵯÁ(517,»2ᘤ¿ÀÂ5sᑁ»¼150mLḄ2஺»2ᘤḄ¿Àᵯ¹(_____A⌕ÄV᫜2ᐰ·»¼»2ᘤ◤Çὑᵯ______J;◤ÉÊ2ḄËj½J.g10N/kg,2ḄANPÌ=1.0x103kg/m3'
6.2017Îᡃḕ,ᙢЦÑ▲ÓÔ6ÕᳮÖ¯×ØÙ⌱ÚÛᐳÔ6¼ÓÝᙶÛÔÑÂßàá©âãᑮå,ᱥᳮRSæÄç⊤⊡ᐙë᦮஺ᱥᳮRSᱥᳮíᳮᙶᙠÑîᑮïðḄñòk¦Ḅ—ញᑷÑÂñõḄÝö÷°ø—ÛÔÑḄÑùúû-ÑḄüᜧ—7.ýᜩᢈÿ
ᵨ◌ᑴᡂ■ᙠᜩᘤḄ᜜⊤☢◌ᨔᐹᨵὊ!ஹὊ#$ஹὊῖ⇨'◞ឋ*+,-./012345◌᧕7Ḅ8-9.:*ᙢ<=ᜩᘤ஺?@ᐵB■ḄCDEFᨵGHᑮḄᱥᳮLឋᨵMN

1A.ᰚ-B.QឋC.QᵯឋD.ST8.UVWXᜧZ[\]^✌᫏ᐰbcdḄWX⁚f⁚f?“hEiWXjᦻᓄmnஹopqrs”umvwxᑖzWXrs{|WXr}9~Ḅ᠗'ᝰE⃩ᮣ☢WEⅾḄᱥᳮᳮḄ\MNA.“ᔬ”¡¢?4⌴¤¥B.“ᐸ.ᐸ”§⌕\᪷ª¡⁐¬ᑨ¯ḄC.“°±²⌕³┴᦬”ᱥ¶·⚣᳛º°TºᜧD.“ᦢ¼អ¾ᜩ@”EḄ“”ᢣḄ\¡Ḅ¡À9.ᙠ“ÁÂÃÄÅᡂÆḄÇÈ”ÉÊ-ËḄ∑ÍÎᙠÏÃÄÅ30cmᜐᙠÄÅÑÒÓÏÔÄÅ16nlᜐḄᐝÖ@×ᑮÍᯚÙᨎḄÆ஺ᑣᑡÝᐵÞḄ\MNজᐝÖ@ᡂ᎔áஹÎᜧḄâÆঝäÄÅḄᯖÏ/■Òèéê8nlḄ?@8A.ᩈᳫḄ67APoB.ᩈᳫḄ67BPoC.CD#$
Eᩈᳫ☟GHIᘤ&ḄJ,KᓄM7D.CD#$
Eᩈᳫ☟GHIᘤ&ḄJ,Kᓄ11r11.Nᩨᩚ⊝ᙠSTU
◤ᙠAWXYZ[,
ᙠ᝞SᡠḄ^[_ᔣ/
abcNᩨᩚ⊝Ḅ,?@8d2⚓
ᐳ22⚓

2A.6g6D.F3g912.ↈᙊᘤ4ஹB&☢aiS^VSB
,ᘤᑁᑖkᨵlaimn஺op'iḄqrsᳫgtᳫᑖuvᙠmn/@Pw
PḄ8
m☢'
᝞Sᡠ
-.mnIᘤ&ḄJ,'x஺pᳫymn/z{H
ᐵ}ᘤ&)ᑮḄmnJ,FஹmnJ~pḄᜧᐵ,ᑡᑨD/=>Ḅ?@8AB
A.Z}B.Zᜧ}C.PAbcᜧ}PBD.PAZ}PB13.᝞Sᡠ
ᵨFḄ,pᱥnBᒴ,
£ZBᒴᓣ'i7
ᵫ+,2ᐵ}8ᒴᓣḄ"/
ᑡ;<=>Ḅ?@8"7hA.ᵫ⌕¡2¢BB.¤¥2¦C.§᜜¥32¦Z&¢D.ª«ᦔ᳛B3Fn214.ᵯ¯°±{ᐭ³ᩭµ¶ᜧḄ·ᑭ
{}¹ᐰὃ⇋
ᵯ¯½Uᨵ¾¿¡ÀÁÂ,ᐸÄÅÆᳮ᝞Sᡠ
rÈÉᵯÊ
/?2JËᵯÊ
ᐸÊÌÍJ,ÎᜧÏÐ஺ᑡ;<=>Ḅ?@8

3ᵯᑴᵯA.ÄÅ.
ᵯÑsḄS᩽B.ᵯÑs?᪷ÔᵯÑÕÖÆᳮᑴᡂḄC.¾¿.
ᵯÑsḄÑឋÐÚD.=ÛÜÝ@Þ¾¿.8
K%Bß15.᝞S
ᳫyàáâ☢ã
äå{ᳫᡠ)᥅ç,èᐸIâ☢J,ḄéS஺16.êëᓷí¹îµï“220U,20W"ḄðñஹᡭgZ[óôõö
÷ø=>ᙢ(ᙠëùᵯú/
⌕ûüᐵSýᑴïᵯðþÿ
ᐝ஺4⚓ᐳ22⚓

417.ᙠ“Ḅ”᎔ᐭ"#$%&'(FLIOOḄ)*ᓣᑮ88./0◞1m%3ᦪᦪ567᝞⊤ᡠ;:/=012345678/min)*889497100103103103103/࠷(1)IJKᵨ(M/⏀O))*P஺QRSM357࠷⏀O78࠷(2)16T/)*P;ᦪ᝞Uᡠ;J6V࠷»(3)X$Y/(ᑏ[ᩩᓽ^)஺(4)_`Sabc%&25ᑖeaY)*P;ᦪᨵᡠgᓣhὃ⇋ᑮ^kᵫmnogᓣpqknoPY;ᦪrsht_uv)*gᓣḄ^wxk஺18.ᙠ“yz{|}~᥅ᜧx”Ḅ$p᝞Uᵬᡠ;Ḅ,ᵨᑮp[_Pஹ[ᩈᙽஹ[ṹஹᩞᧇq⊤☢*rḄᩈ஺$12ᵨḄᩈ3ᵨ⊤☢%Ḅᩈ஺

511ஹ2^yz¡஺2¢£¤1/¥ᑴr§*¨©/=sᓄḄU«᝞U¬ᡠ;,ᩈᙽḄ*©/=sᓄḄU«᝞U®ᡠ;ᑣᩈᙽᙠ7s/Ḅ᥅°N஺3±[²³´µ¶pᦋµ¸¹᝞Uºᡠ;/¨Ḽᩈ¼½ᙢ☢ᔣÀÁ~ÂÃ~ᩈ/ÄKᩈᒴÁ~Æ⌱È“”ᡈ“r”Ê_Ë`ᩈᙽᡠÌ}~ḄᜧÍḄᳮᵫk¡;¨Fļ½³ᔣᑣᩈᙽÐᩈḄ᥅ᜧÆ⌱È“Ñm”ᡈ“rÑm"ÊᩈÐᩈᙽᡠÌḄ᥅ᜧÓ²ᙠVUº/¨~ᩈÔᨵÕ/Ö×ᩭ'ᩈᙽᨵ(ᑖÙ[}`ᩈ⊤☢Ḅ/᎛ÆᩈᙽÄXᩈgᣵ×Ê᥅2.2NÆ⌱È“ᜧm”“m"ᡈ“Ñm"Ê஺19.[ÜÝÞḄßàᵯo°2.5U,
ᐝ/Ḅᵯâã°0.34äå_ËæÝÞḄßàç᳛é$ᨵ᝞×ᘤᩞ[ᵯo⊤ஹ[ᵯâ⊤ஹ[£ᐵஹᵯìஹ}~síᘤஹuîÂï஺6⚓ᐳ22⚓

6ᵯoU"12.52.8ᵯâ//40.180.28(1)ðÍᵨñòîóôuîᵯõö÷ø᦮஺(2)ᵯõ
úö÷aûᔠ£ᐵYÝÞrýᵯâ⊤þ;ᦪᵯo⊤ᨵ;ᦪ`Yæ[ᦑḄ஺(3)᣸◀ᦑᦪ᝞⊤஺ᐝᵯ"⊤#ᦪ᝞$%ᡠ#'Ḅ()*᳛,W„(4)123᝞$4Ḅᵯ5$6()ᵯ",/⚣Ḅ42Ḅ()*᳛஺:;<ᫀ᝞>?(ᵯ@ᵯABCDECFᘤHḄᨬᜧFK,H,DECFᘤ/?2ḄᨬᜧFK,/?2)জOPᔠRᐵSUS2,VEWDᱏYᵯ"⊤Ḅ#ᦪ,/ZঝOPᔠRᐵSUS1,VEWDᱏYᵯ"⊤Ḅ#ᦪ,/]^ᢝCFᘤḄDᱏ`aBEbcdeDECFᘤDᱏVᑮᨬghᵯ"⊤Ḅ#ᦪ,ib'DECFᘤḄDᱏVᑮᨬjhᵯ"⊤Ḅ#ᦪ,kᑣ()*᳛Ḅ⊤mn______o(ᵨ/⚣ஹkஹ&ஹt2uḄvw⊤#)஺20.᝞$dzᵨ{|}~ᙢஹ᫑᫡~~Ḅnᤅ஺~ᤅbᧇ~ᡂE᎔ᐭᧇᧅᙠᓣᵯḄE>ᧇᧅ⚔h)D¡ᓣᑮd)`aᯠbᔂ>஺¤nᤅ¥ᑖ§ᦪ᝞⊤ᡠ#¨?©ª/2M310᦮¬(kg)2000Ḅᧇᧅ¬(kg)70ᓣᵯ()*᳛(AW)4.5(1)ᓣᵯ~8/1,®ὑḄᵯ°±kW²(2)³ᧇᧅ´〈±400kg,ᑣ〈407n3Ḅ¶±◤⌕°±²(2Ḅ¹º,2x103kg/m3)(3)»b¼ᨵ4000NḄᧇᧅᓣ9m,³ᓣ¥ᑖḄ¾ᦔ᳛,80%,ᑣᓣuᧇᧅÀᑮḄFÁ°±N?(B3ÂÃÄD᥅Æ)

721.$ᵬḄÈÉÊᘤËᨵ¬0.5kg,Ë☢Í100cm2ḄÎ<ÏÐ᫜᫜¡hÒ¬ÓÔkÕÖÁ×ᵯFḄÒ¬ØÙᱏ4ÚÛÜÊᘤË0.4ᜐḄÞßᨵ᣸Éàá▀ã஺áᑴᵯ5᝞$%ᡠ#ᐸᵯ@ᵯAU=12U,R=10/2,ᵯ"⊤#ᦪ,0.64æo᫜Ëᓣ¶▀ãᡠᜐçº▀ãèéê᣸É஺Á×ᵯFRkëᡠÀAÁᔆḄíêᐵî᝞>⊤ᡠ#(ÓÔᙳᙠÓឋ▲ºᑁ)஺¨?AÁF/N24.....1215ᵯFR/011070.....1610(1)Ð᫜ḄÃÁ°±N?(2)óÉÁ×ᵯFᡠÀAÁ,2N,ᵯ"⊤Ḅ#ᦪ°±ô²(3)ÊᘤᑁḄÉõmᑮ°±öàá▀ãèᡭR᣸ɲᵯRø8⚓ᐳ22⚓

8ûᫀUü᪆1.ூûᫀ௃
⌴ூ᪆௃(1)᪶Ḅᒹ᪶᪶᪶ᯠ!"ᑮ⊡ᐙᡠ'(᪶)
*+஺(2).□0ᘤ2Ḅ0ᔾᦈ.□56Ḅ70Ḅᑁ9:;)<=⌴Ḅᩭ9:0Ḅᑁ஺ᦑ@ᫀB
C⌴஺(1)D)
'ᯠ!"ᑮ⊡ᐙḄEFB
*+CG=HIJKᡂḄஹNOᑁPQឮSḄEFB*+஺(2)⌴TUV
'ᦋᱥYḄᑁ஺Z⚪ὃ]^
*+ᦋᱥYᑁḄY_^+`ᜐᜐḆᱥᳮ⌕ᶇfgh+`஺2.ூ@ᫀ௃ᑖklᙢTPnᑣpqrstூ᪆௃uvᑁḄwᱥxyz5Ḅ{|᧕“ᕡ”;)ᵫḄᱥF+^᡽ᦣ_(ᑖklᙢTPnᑣpq;_|᧕+ᙠrst஺ᦑ@ᫀBᑖklᙢTPnᑣpqCrst஺ḄᱥᙠᱥḄᑖkᐭḄ_᡽ᦣ_஺᡽ᦣ_Ḅᐵ᡽ᦣ_஺Z⚪ὃ]^᡽ᦣ_¡¢Ạ⚪஺3.ூ@ᫀ௃¥|¦ூ᪆௃(1)ᵫ0Ḅ¥|ᜧᙠᩩ©ª056Ḅ7«¬ᡠ'“ᨨ®”2ᵨ0T°p7ḄᱥC(2)ᜩᯠ®Ḅ¦«²ᐰ´µ7Ḅᜩᯠ®¥ᩈᩞஹ᯼¹º56Ḅ7¬ᡠ'◤ᦋᵨᜩᯠ®T´ᧇᩭ½0:஺

9ᦑ@ᫀB¥|C¦஺0ᐹᨵ«ᜧḄ¥|ᙠᩩ©ªᔾ5V«¬Cᩈᩞஹ᯼ºÀY´ᧇ¥ᜩᯠ®ᐹᨵ¦ஹÁÂÃÄźÆÇ஺È⚪É⌕ὃ]^¥|ஹ¦ÊË¢ZᭆÍḄᳮÎḄÏᵨ¡¢Ạ⚪஺4.ூ@ᫀ௃Ñ
'ᦋᱥYḄpqÒ᝱Ô®ூ᪆௃ᵨÑᤍÖ×ØÙÚÛq×ÜḄpqÒ᝱+ᦋ(Ñ
'ᦋᱥYḄpqÒ᝱C×Ý∉Ûq½Ô®ßËᔣªḄÑáᱥYÑḄâᵨ)Ḅ×Ý∉ãᑮÔ®ßËᔣäḄÑåᐸᓣÔ஺ᦑ@ᫀBÑ
'ᦋᱥYḄpqÒ᝱CÔ®஺(1)Ñ
'ᦋᱥYḄpqÒ᝱C(2)ᱥYÑḄâᵨ)ḄCZ⚪ὃ]^ÑḄâᵨᦔéᱥYÑḄâᵨ¢Ạ⚪஺5.ூ@ᫀ௃1250075ூ᪆௃(1)ᵫí=U/
"ñ0ᘤḄòâᵯô:P.Ir=—=—=1AA,U5Vᵫ⚪ö
÷ø;᫜0ᐰúñ6◤⌕Ḅ:15xl03mLr-cc------X5s=500s,150mLᵫP=/ᘤ◤ὑḄᵯ:W=Pt=5Wx500s=2500/(2)ᘤᓣḄ:1h,=0.75m——x0.5m=0.5m,2ᵫP=£ᓣḄ$%:m—p'V=1.0x103kg/m3x15x10-3m3=15kg,◤,-Ḅ./01:Wr=Gh=mgh=15kgxION/kgx0.5m=75/஺310⚓ᐳ22⚓

10ᦑ7ᫀ9:1:250075o(1);⍝=Ḅ>?1᳛ABCᵯDᑭᵨP=U/H?ᘤḄBCᵯI᪷K5sᑁ?15(hnLḄH?15LP◤⌕ḄPR᪷KW=PtH?ᘤ◤ὑḄᵯ(2)ᵫU;Ḅᐸ.WᙠYZᜐ\Ḅ.Wᑮ?^Ḅᚖ`abᘤᓣḄc;Ḅde᪷Km=pHH?Ḅ$%᪷KW=Gh=mg/iH?,-./0Ḅ1஺j⚪ὃmnᵯ1᳛opஹᵯ1opஹ01opஹropஹ./opḄsᵨ;⍝ᘤᓣḄbᐵu஺6.ூ7ᫀ௃yzA☟|Ḅ}~ឋᱥdᨵឋᙠD/P.ᜧ/☢eDூ᪆௃(1)ᙶᙠ9᯿ᱥḄRᨵḄᓄbyzḄᦑᱥᳮ¢ᳮbyzA☟|Ḅ}~ឋ(2)£¤YḄo¥ញᑷP¨Ḅ©ª«¬ᵫ®¯/°|yz¬ᵫ®ឋ±²³ᢝ¢ᩭḄyz¶᝱ᡠd¹º»ᦑᱥᳮ¢ᳮbᱥdᨵឋ(3)o¥Ḅ./¼½¾Ḅ./ᜧ9nᙢ☢ḄDᡠo¥ḄÀ¼½¾ḄÁᜧᦑ¢ᳮ9ᙠD/Pᜧ/☢eD஺ᦑ7ᫀ9yzA☟|Ḅ}~ឋᱥdᨵឋᙠD/Pᜧ/☢eD஺(1)ÂÃẆÅᱥd᯿ᱥRḄÆÇbᔲÉÊᓄᓄᑣᱥdyzÌᨵᓄᑣᱥd☟|(2)ᑗᱥdÎᨵ³ᢝ¢ᩭyz¶᝱Ḅឋ$Ïឋ(3)ÐÑDḄÒÓD/A/☢e஺j⚪Ôᔠὃm᯿ᱥஹឋÖ×ØÐÑDḄÒÓÙÔᔠឋÚØḄ;ÛZÜÝÞßᜧ7.ூ7ᫀ௃Cூ᪆௃4ஹ■âãᐹᨵὊæḄçZèéêæ«ß¹ᰚᓄᡠᐸᰚZ஺ᦑAßíᔠ⚪î3ஹ■âãᐹᨵïðḄ◞âឋèéᐸòâឋó஺ᦑBßíᔠ⚪î

11Cஹ■âã“ὊæஹὊö÷ஹὊῖ⇨A◞âឋðÙçZúûü,-nýþ◌᧕Ḅ”ᵯឋᨵᐵ஺ᦑcᔠ⚪஺ஹ■Ὂ᧕ᐸ"#$஺ᦑ஺ᔠ⚪஺ᦑ⌱&Co᪷(ᩞᧇ+ᡠ-■./0ᐸ12Ḅᱥᳮ5ឋᯠ7/0ᔠ⚪Ḅ⌱⚗஺9:ᩞᧇᐹᨵ<Ḅᱥᳮ5ឋ<ᩞᧇ=>ᐹᨵ?<Ḅᱥᳮ5ឋ஺8.ூCᫀ௃BூF᪆௃F&4ஹHᑮJḄKLM⍝OPᩭRSLT>U⌴WXᦑA┯Z[T⁐]᧜RLTḄ_`aᱯ⁐“mᐸLnMᐸO”o⌕q᪷(T⁐ᩭᑨsḄᦑBt/Cஹ“uvh⌕w┴᦬”ᱥdz{|ᜧu#|ᜧᦑC┯Z஺ஹLTḄu#ᢣḄqLTḄᜧ“ᦢ$LអᜩO”SḄ“$”ᢣḄqLTḄu#ᜧᦑ஺┯Z஺ᦑ⌱&B஺(1)<ḄcLdᩞᧇae᪀<ᡠcgḄLTḄT⁐i<T⁐qs(3)(4)LTᱯឋ&Tஹu#aT⁐஺TcLdḄz⚣᳛ᨵᐵu#cLdḄz{ᨵᐵ஺⚪ὃRLᨵᐵḄMM?ᐵM>+Ḅ?eᔠqt/FCḄᐵ஺9.ூCᫀ௃BூF᪆௃F&জঞ∑¢£¤¥¦§30cm¨ᙠ¦§Ḅª9«16CMᜐᐝ®¯ᑮ9°ᨎḄ²ᱥ£ᜧ³²£ᡂ᎔¶·¸²q᯿?ºḄ»ᳮᦑজঞ┯Zঝ½¨ᱥdᙠ¾¿ᯖ£᜜²ᙠ9¿ᯖ£a¾¿ᯖ£ÂÃᓽ30cm>2f2f>16cm>f,F¯&8cm

12²ÒÓÔÕÖ²Òפ¥¦§ØÙᐝ®Úᑮ°ᨎḄ²ÛÜḄÝÞØ&Ùᐝ®×¤¦§Ù²ᡂᙠᐝ®ᦑটt/஺ᦑ⌱&B஺(1)(3)¥¦§ᡂ¸²¨ᱥ£ᜧ³²£ᡂ᎔¶ஹ·Ḅ¸²ᐸ2ᵨq᯿?º(2)¥¦§ᡂ᎔¶ஹ·Ḅ¸²¨u>2f,f

13(1)ᩈᳫ
noᑮqrᔣXḄஹqrᔣRḄuvwxḄy
᪷Ḅ⊝ᩩ
ᑭᵨᳮF=P1gV᣸3G=mg=pUgᓽ}[ᩈᙽḄ~U஺(2)789:
ᩈᙽ<
᪷<ᩩ}[ᩈᳫᡠoḄCᓄE
ᵫ
᣸PḄ"#
}[P☢RSḄTU
ᯠBᑭᵨ==5}[eḄCᓄE஺⚪ᔠὃo⊝vᳮḄᵨ
ᐵX[P☢ḄRSTUḄᑨ8
dYᡠoeHᑭᵨF=pS
ᨵHḄU஺11.ூᫀ௃Dூ*᪆௃*Fiv=2¢ᩨᩚ¥¦Ḅ§ᔣ¨uᱥ¨ᩨᩚ¥¦Ḅ§ᔣª«
&¢ᩨᩚ⊝.%ḄF®
¯°¢ᩨᩚ⊝.ᐭ¢ᩨᩚ¥¦Ḅ§ᔣ¨uᱥ¨ᩨᩚ¥¦Ḅ§ᔣª²
¯°¢ᩨᩚ⊝.ᦑABC¯³ᔠ⚪
஺³ᔠ⚪஺ᦑ⌱Do(1)´¢ᩨᩚ¥¦Ḅµ¦
¶·ᩨᩚ¥¦Ḅµ¶.(2)¸ḄF0,ᑣ¹ºcᩨᩚḄ⊝ᨵ»¼஺⚪ὃᩨᩚ⊝ᩩḄ½ᵨ
ᐵ¾k¦v¶Ḅ¿஺12.ூᫀ௃ACூ*᪆௃ூᑖ᪆௃ᑖ᪆⚪
⌕ᳮÂᔜEḄᜧᐵÅ
Æ᪷ªḄᱥᳮZÇ&Èᦪʽ
[ᡠ◤⌕EḄᜧ஺ூ*௃Ì4VᘤᑁÎ"Ḅ~UFPA
BVᘤᑁÎ"Ḅ~UFPB
Ð[ÑÒÎ☢TUFÓ
ᳫÐ[Ñ
ÒVᘤÔÎ"cVᘤdYḄeªb
^pghS=pghS,ÕÖF×PB!ÙᳫÐ[B
4VᘤÔÎ"cVᘤdYḄeXFA=PA஺(Ó-K)SA=pghS-pgV^AAABVᘤÔÎ"cVᘤdYḄe:Ü14⚓
ᐳ22⚓

14FB=pBg(h-=pghS-pgV^BBBßàáᳫvâᳫḄãEª²
P7PB'⃬>”
ᡠ&¯°k01¨PBḄᜧ஺ᦑ⌱ACc13.ூᫀ௃CDூ*᪆௃*Aஹᵫä
¢ᵨḄïðñn=3,ïðñwxóᵫô⌕õ¦ö÷s=nh=3úᦑA┯ஹûὶ.BஹyýḄþÿ
=F2S=2x3h=32ᦑ8┯CஹᵨḄᨵᵨ!ᵨ&#ᓣhḄᓽ&ᨵᵨ=&'()Ḅ*᜜,W.=/
_0ᨵᵨ=32h2a/1,ᦑC78DஹḄ9:ᦔ᳛,V=>=?ᦑ஺78ᦑ⌱:CD.(1)ᵫFGᵨḄn=3,IJKLMNOᱥQḄRᓣSTḄUV(2)G⍝()ᜧYᑭᵨW=Fs\()Ḅ
(3)ᵨḄᨵᵨ!ᵨA#ᓣhḄ()Ḅ*᜜
^_ᨵᵨ(4)Ḅ9:ᦔ᳛ᨵᵨa
bc஺d⚪ὃghᵨiᨵᵨஹ
ஹ*᜜ஹ9:ᦔ᳛Ḅjk78lmᨵᵨn
Oo⚪Ḅᐵq஺14.ூtᫀ௃A

15ூo᪆௃o,4ஹxyiᵯ{|ᵯ}~Ḅ☢{ᐭᑭᵨᑣᑨᵯ}~ḄN᩽RS᩽ᦑA78,8ஹᵯ}~O᪷ᵯ{Ḅ}ᦔᳮᑴᡂḄᦑB┯CஹiḼ)ḄᜧᵯḄḼ^Y᪷¡¢£Gᵯ¤¥Ḅᵯ{⌲§ᜧᵯ}~Ḅ}ឋ⌲§©ᦑC┯஺ஹ7ª«¬(i)ᵯḄ®ᜧᵯ}~}ឋ¯⊖~±²³(´Ka☟¶·4!¶ᦑ஺┯஺ᦑ⌱:(1)G⍝ᵯ{Ḅ¸ᔣ᪷ᑣᑨᵯ}~ḄNS᩽(2)ᵯ}~O᪷ᵯ{Ḅ}ᦔᑴᡂḄ,(3)Rzᵯᐸ)ᜧ½^Yᡠ¿G⍝iᵯḄÀᓄ«¬᪷/=9ᑨᵯ{ḄÀᓄᵯ}~Ḅ}ឋ©¯nᵯ{ᜧYஹᙌÄᦪÆÇᨵᐵ(4)7ª«¬(i)⊖~±²³(´Ka☟¶·4!¶஺É⚪Ê⌕ὃgḄOÌÍÎᵯ}~nᵯ}ÏᵯᘤḄᳮஹ}ឋ©¯ḄÑÒÓÔஹᑣḄᳮonÕÖGm·®Æ×ØOÙẠឋ⚪Û஺15.ூtᫀ௃o,Yᳫ|Þßà☢Ráᡠâ᥅ä)Ḅ¸ᔣåà☢ᔣRæᱥQḄçèyåà☢ᔣRḄ)ᓽ᥅ä)ᱥQÎà☢Ḅ)Ḅyᵨ·ᙠᱥQaà☢!¶☢Ḅ¥·ᜐæÉ·yᚖà☢ᔣḄ)ᓽ)F,᝞F,ூo᪆௃(1)ᱥQÎà☢Ḅ)yᵨᙠà☢Ryᵨ·íîᙠà☢R¸ᔣOᚖà☢ïðᢣᔣà☢ᑁó(2)᥅ä)Ḅ¸ᔣaᱥQôL¸ᔣᡈôLö÷Ḅ¸ᔣøùᱥQᙠà☢Rᨵåà☢Ḅö÷ÓÉ᥅ä)Ḅ¸ᔣåà☢ᔣR஺(1)d⚪ὃgh)ḄúûFḄîü)ḄúûF⌕⊤ú)Ḅyᵨ·n)Ḅ¸ᔣ᥅ä)Ḅ¸ᔣaôLö÷øùþ16⚓ᐳ22⚓

16(2)⚪᥅ḄᱥᱥḄᱥ☢Ḅᵨ!ᙠᱥ#஺16.ூ)ᫀ௃,-.ᐵS1ᑴ3ᵯ56789ᐝ5;<ὶ.ᐵ>ᙠ?@#;5;>B-CDᐜFᐭ.ᐵ᪵ᙠI..ᐵJᑗICDL5;ḄM>>N5;O9PNᵯQᦑ஺STUVḄ>BWX>YDZX>CD[>ᙢD஺᝞^ᡠ`-火线军线地线ூ,᪆௃ᵫ⚪cd5;<ὶDFᐭ.ᐵeSTUVḄ>BWX>YDZX>CD[>ᙢD஺fghiᵯ@Ḅ5;ஹ.ᐵஹSTUVஹTUVஹk◅mḄ>BnJὃ⇋qᵨឋstᐰឋ஺17.ூ)ᫀ௃wx91z{kᢝ}~w{}ᜧூ,᪆௃,-(1)᪷⊤ᦪcd~wḄ103⏀Ḅ78wxḄ357,ᡠᵨ⏀z{F◤⌕qᵨwxz{wḄe(2)ᵫ^dz{Ḅᑖ{FC,`ᦪ91஺(3)᪷⊤ᦪcd~wJ◤⌕ᔾ¢z{kᢝ103T}e(4)~wJwI¥9~wḄ{⌲§}ᜧᵫ¨~w#©Ḅª}ᡠ«¬}ᜧḄc~w{}ᜧ«¬Ḅ஺ᦑ)ᫀ-(1)wxe(2)91e(3)z{kᢝ}e(4)~w{}ᜧ஺(1)᪷⊤ᦪcd~wḄ103஺aᡠz{ᑁ°Ḅ◤⌕±¨103஺(2)qᵨz{ᦪJᐜ²³´sᑖ{Y#µY¶e(3)°Jᔾ¢z{}e(4)·¸°Ḅ¹ᨵªஹ°Ḅ»¼ஹ°Ḅ{½஺

17⚪¾¿~wḄÀ⌕ὃÁÂz{Ḅ⌱Äsᦪஹ~wJḄᱯஹ·¸~w}ᓄḄ½Ç{ᜧ஺18.ூ)ᫀ௃>N☢ÈÉ´{ÊnJËᜧÌÍ᥅Ëᜧ3ᩈᙽᜐ¨☟ÒÓ᝱wÕ©ᔣÕ⊝½¨½¨ூ,᪆௃,-(1)ᵫ1ஹ2Ø>N☢ÈÉ´{Ên2ÙᜧÚÛᜧᦑcÜ-ᙠ>N☢ÈÉ´{ÝÞJËᜧ᥅Ëᜧe(2)ᵫ^ßd-2à6sᱥáᒴãäÍJᱥᜐ¨Õ⊝Ó᝱ᑮḄÚs᥅ÝæÕ⊝ᜧçʽᵫ^èdé´ḄÚ3N,ᡠÌÍ᥅3Ne6à8sᱥáêãäÍëᵫ¨Ḅ>N☢ḄÈÉ´{},᥅}ì3N,ᦑí7sJ᥅3Ne(4)îïÍðᩈñJòqðᩈñáᒴãäÍJᩈᙽᜐ¨☟ÒÓ᝱ᑮÕ⊝ḄᵨÚs᥅ᜧçʽ©ᔣÊóæᩈᙽḄÚ©ᔣwÕᔣWᦑᩈᙽᑮḄ᥅©ᔣwÕᔣZeôõᑖ{0.1N,J`ᦪ2.2N,ᓽÚ2.2N,ᦑÌÍ᥅2.2Neᦑ᥅ḄᜧçeîÚFò÷wÕ©ᔣᑣᩈᙽæᩈñḄᦋ}>N☢ḄÈÉ´{}ᑣæᩈñḄ᥅ᜧç9Pᦋ}ᵫ¨ᩈᙽæᩈñḄ᥅ᜧçsᩈñæᩈᙽᡠḄ᥅ÝæÊúᵨᜧçʽḄeçûᙠ^üýþJÚÍᩈñÿᨵ
ᩭᩈᙽᨵᑖᩈ⊤☢Ḅ᎛ᵫ☢Ḅ!᥅#!$%᥅#ᜧ'%2.2N஺ᦑ*ᫀ%,(1)☢./0ᜧ1᥅#0ᜧ2(2)32(3)32ᩈᙽᜐ☟67᝱9:;ᔣ=:⊝2?2?஺(1)@A1᥅#ᜧ'BCᨵDE,ᜧ'☢ḄẆGHᐸJEBCḄᐵL⌕NᑴP᜜EBC!᪷STJUVWXY2(2)᪷STZᑖ᪆ᔜ]Ḅ^1_`᪷STaᑖ᪆bḄᜧ'᪷S@A᥅#ḄBCᑖ᪆᥅#Ḅᜧ'2(3)ᩈᙽHcdef☟61◤⌕Nᑴᩈhᒴjkl^1mnopqmcdefrᦪ2.tqᵨḄᜧ'v./Ḅ2@A᥅#ḄBCᵫ☢ḄH=☢wxᐵ஺y⚪{G1᥅#Ḅᜧ'H|}BCᨵᐵὃnoᳮ
Nᑴ!Ḅ^ᵨ@A18⚓ᐳ22⚓

181᥅#ᜧ'ḄDEBC
no;ᫀḄᦋ஺19.ூ*ᫀ௃0.65ᢝᱏ1R2ூ᪆௃,(1)!ᘤᢥᐭᵯJ¡¢ᐝḄᵯ¤¥%0.34,ᦑᵯ¤⊤⌱ᵨ'§ὶᙠᵯJ'Ḅª«ᵯ%2.5¬ᦑᵯ⊤⌱ᵨ'Hὶ,(2)ᵯ¯°±ᔠ³ᐵ¢U'´ᵯ¤⊤xµᦪᵯ¶3ᵯ⊤ᨵµᦪᑣ¸¹ᵯ⊤Hᵯº»U¼ᦑ½ḄB¶3v2(3)'¡¢ᐝᵯ¤⊤µᦪ᝞Taᡠµᵯ¤⊤⌱ᵨ'ᑖÀ%0.024ᵯ¤%0.264Ḅª«ᵯ%2.5V,ᑣ'Ḅª«Á᳛%:P=UI=2.5Vx0.262=0.651V2(4)জ±ᔠ³ᐵSS2,Å1&ᱏÇᵯ¤⊤Ḅµᦪ%/É஺ঝ˱ᔠ³ᐵSSiᢝᓰᱏ1Å1&ᱏÇᵯ¤⊤Ḅµᦪ%/3ᢝ!ᘤ/?2Ḅᱏ1ÍPE1!ᘤᱏÅᑮᨬÐÑᵯ¤⊤Ḅµᦪ%AÒÍ1!ᘤḄᱏÅᑮᨬÓÑᵯ¤⊤Ḅµᦪ%Ð஺ᙠজJÔH§ὶ¡¢ᐝᙠঝJÕH§ὶB%ᵯJᵯ¤$%/Öᡠ×/?2=%ᢝ&ᱏ1ÍPE1!ᘤ(R1)ᱏÅᑮᨬÐÑᵯ¤⊤Ḅµᦪ%A,ÒÍ1!ᘤ(Ø)ḄᱏÅᑮᨬÓÑᵯ¤⊤Ḅµᦪ%/2஺ᵫ§ὶᵯᱯÛÜÝ«Þ¶W,[/=//?=/(/?+/?2),W,ß2=à1221'ª«Á᳛Ḅ⊤áâ%,P^=g=/¡2=/ä•æ஺

19ᦑ*ᫀ%,(1)çT,(2);(3)0.652(4)ঝᢝRiᱏ12&2%A஺(1)!ᘤᢥᐭᵯJ᪷S¡¢ᐝḄᵯ¤¥%0.34¯«ᵯ¤⊤⌱ᵨ0é0.64§ὶᙠᵯJᵫ'Ḅª«ᵯ¯«ᵯ⊤⌱ᵨ0é3UHὶ;(2)êᵯ¤⊤µᦪ%0,´¸¹ᵯ¶32ᵯ⊤ᨵµᦪ¸¹ᵯ⊤Hᵯº»ᑣHᵯ⊤ὶḄë×᜜ḄᵯvìíḄᑣHᵯ⊤ὶḄëî2(3)᪷Sᵯ¤⊤⌱ᵨ'¯«ᑖÀrᦪ᪷SP=U/W'Ḅª«Á᳛2(4)ïðḄª«ᵯ¤¶»ñ&?ᦔóô¡¢ᐝÒ᪷SᵯᱯÛᑭᵨᵯº!föḄÀᵫP=/2Rföª«Á᳛஺y⚪e'Ḅª«Á᳛Ḅnoὃᵯஹᦑ½ᑖ᪆ஹᵯ¤⊤rᦪஹᵯÁ᳛fö
øfno;ᫀḄ3vJὃ¡çḄ⚪ù஺20.ூ*ᫀ௃,(1)ᵯú¡ûq8üP=P^=4.5kW,ᑣᡠýὑḄᵯ3,W=Pt=4.5kWx8h=36kW-h!(2)40m2Ḅÿ
Ḅm—pV=40m3x2x103kg/m3=8x104kg,ᡠ
400kg,ᦑ⌕Ḅᦪ(3)ᨵᵨḄஹ᥅"#$%&ᦑḄ'᜜ᧇᧅḄ+ᧇᧅ,ᑮ./Ḅ&ḄᧇᧅḄG%=mg=70kgxION/kg=700N,4m+n*___wᨵᵨ_wᨵᵨGhG—34J᪷6“898wᨵᵨ+w'᜜—G"+cᧅ"+3—c+G]+f<=:?ᓣABCᧇᧅ,ᑮḄ&/=F-G—GG=CH-4000/V-700/V=300N஺B:(1)?ᓣᵯLMNOP84QὑḄᵯST364UVFফᧇᧅS〈±400kg,ᑣ〈40nl3Ḅ
Z[◤⌕200F(3)?ᓣABCᧇᧅ,ᑮḄ&T300N஺ூ^᪆௃(1)bcᵯL'd᪷᳛6W=Ptᓽ

20ᧇᧅḄ+ᧇᧅ,ᑮ./Ḅ&Ḅ,᪷64=ᑶ=wᜐ--=c\=/⁚

21(3)°æᘤᑁḄ»àìᑮ0.6í¡îé▀µ·ᡭØ᣸»஺ூ^᪆௃(1)c⍝᫜Ḅ᪷6G=mggh஺(2)ᵯ&ᡠ,2N¡ñ⊤Còᑮó¹Ḅᵯ&᪷6ôõdöghᵯ©஺(3)°ᵯ©⊤ªᦪ0.64²᫜³ᓣZ▀µᡠᜐ¶k¡Ø÷᣸»ᑭᵨôõdöghᵯ£¤ᵯ&ghᵯ&RḄ&¢ᙠ⊤Còᑮᯠó᫜úû,ᑖ᪆gh᫜Ḅgh᫜᣸Ø»ḄÄÙgh»Ḅàký3Ð᫜þḄÿᓽ஺⚪ᔠឋᑮஹஹ⚪ᑖ᪆!"Ḅᐵ%஺&22⚓ᐳ22⚓