山东蒙阴县2022-2023学年物理九年级上册期末调研试题含解析

《山东蒙阴县2022-2023学年物理九年级上册期末调研试题含解析》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。

2022-2023
ᱥᳮᔁ⚗1.ᔁὃḄஹὃ!"ᑏᙠ⚪ᓱ஺2.(⌱*⚪+⌱,-.⚪ᫀ0ᵨ234⚪ᓱ56⚪7Ḅᫀ᪗!9:᝞◤ᦋ>ᵨ?@ABC0D⌱9ᐸFᫀ᪗!஺(G⌱*⚪+ᫀᑏᙠ⚪ᓱᑏᙠHᔁIᦔ஺3.ὃKL0HᔁM⚪ᓱNOP(஺Nஹ⌱*⚪1.QRSTUᕒḄWᐰYZ[ᨵWᐰ]^_`a_b.dTeᙶᙠg᫹+g᫹iḄjᐵSilᔠn^_Wᐰ]ᑣjᐵS2pjq⊤sḄᢣauvwxn_Wᐰ]ᑣjᐵS2lᔠᢣauᰐz.iᑡ[|ᨬᔠᳮḄᵯ2.iᑡᵨ⌴ḄᩭᦋᱥᑁḄA.ᵨᨨḄᓣB.ᵨᩩᩈᩩḄᓣC.᥅AḄᓣD.ᵨ¢£¤ᢚ¦§¤ᢚᜐ¦§Ḅᓣ3.ᐵ
R=?,iᑡ©ª«¬ḄA.Ḅᵯ®ᵫF°Ḅᵯ±M²³FḄᵯ´µ¶B.Ḅᵯ®ᜧ.¸¹°Ḅᵯ±º²³Fᵯ´Ḅ»¼C.Ḅᵯ®º²³FḄᵯ´ᡂ¢»D.°Ḅᵯ±Q¾+¿Àᨵᵯ´²³ᡠÂᵯ®Q¾4.iᑡᐵ¹ÃஹᑁMÄḄÅÆ«¬ḄA.ᱥḄÇᑁN¶ÇB.ÈÃM⌴ÉᦋᱥḄᑁC.ḄᱥÊᨵḄÄ»ËḄᱥÌ

1D.ÄÍÎᑁᜧḄᱥᔣᑁ.Ḅᱥ⌴5.᝞NÐᵨᩭÑ⛲⁚ÔḄ.ÕudNÖu×ØᐸFḄuÙÇÚvᑣÛÜ.ÕuḄÝÞA.ßὶB.OὶC.ßὶஹOὶÉᨵD.Çᑨp6.ᙠâNiᵬஹäᵯ®Ḅᵯ´åᵯ±Ḅᐵ_᝞ᡠa.ᵫæçᵬஹäOὶ0Þᙠᵯ±Q3VḄᵯè°ᑣᵯéὑḄÍÃ᳛QB.0.9WC.1.8WD.0.6W7.᝞ᡠaâì[|Ḅíîï´ðᓄḄÑòóᳮ஺ôõöḄ÷ᜮùúûÀᙠ²³Ýᩚ]>ý>®ᘤḄýᱏP
஺ᔠᐵS,ḼḄᦋ
ᑡḄA.ᜧᵯ⊤ᵯ"⊤#ᦪ%ᜧB.ᜧᵯ"⊤ஹᵯ⊤Ḅ#ᦪ'(ᜧC.)*ᵯ"⊤#ᦪᜧᵯ⊤#ᦪ*D.)*ᵯ+,ὑḄ./᳛ᜧ8.᝞2345□7LED8
ᑡ9ᐵ┯;Ḅ

2A.LED8ᵫ=>?ᩞᧇᑴᡂḄB.5□7ᵯDEF5□7GᓄIᵯ7C.5□7JKL7MD,5□75□ᑁOPL᪶RSTḄ7U9.᝞2ᡠ#WXYZḄ[\]^_`ᩈbcdeXYfXYfeghi
ᑡḄA.XYfegḄhij᝱B.ᵨ⏀n8[\o⌕qrs/ḄtuᦋḄᑁ7C.`ᩈbcdeXYfvYᑁḄwxᑁ7yz)*D.`ᩈbdeḄr{`ᩈbḄ|}7GᓄIwxḄᑁ710.᝞2ᡠ#ᵯ+ᵯMᵯ"I12V~ᢝy.ᔠᐵS,ᱏPᘤḄᵯ"⊤Ḅ#ᦪI4V
ᱏPᘤḄbᵯ"⊤Ḅ#ᦪᓄ2V,ᙠ10sᑁᵯLḄ\UI36J.ᑣ
ᑡḄaRbA.ᵯ+ḄᨬᜧᵯI1AB.ᱏPᙠ10sᑁᘤK,ὑḄᵯ7I60JC.ᘤKᐜ_,ὑḄᵯ/᳛'(I81D.Rᐜ_,ὑḄᵯ/᳛'(I16911.Lᱥ?ᑁḄ(ᨵ⁚Lᱥ?¡Ḅ¢£¤¢ᓄ5¥¦Lᱥ?⌼ᡂ¨©.ªo⌕«IḄ

3A.¬*B.®¯°C.]D.(\±ᜧ12.*²³ᨵ´ᵯ"9µḄᵯ¶·ஹᵯ¸┡ºᵯ»|ᔜ3½ᢥ᯿Àᵯ0.5ᐗḄÂÃ᪗ÅƪǽᵨᵯᘤÈÉÊ1*ḄᵨᵯÃᵨËᑴᡂ᝞2ᡠ#ḄÌÍ2.ᑣ
ᑡν⌱⚗ᑨzḄA.ᙠªÇ½ᵨᵯᘤᵯ¶·ÈÉÊḄᵯ"ᨬB.ÈÉÊqrᵯ¸┡Ḅᵯºqrᵯ»|Ḅᵯ9ÒC.ᵯ¶·´/᳛ᜧIkWD.ᙠ3½ᨴᑁ*²³ᵯ¶·ḄᵨᵯÃᵨ3(ᵯ¸┡ḄᵨᵯÃᵨÔÕஹÖ×⚪13.ÙÎd{ÚÛ|ÜÝḄGI240
r/min,ᑣªÞÚÛ|ᙠIsᑁ¦᜜s/஺᝞2ᡠ#ÚÛ|d{àá☠ÜÝḄãឋåᡂḄ஺⌱Ö“”ᡈ“y”14.éê᥅ìrḄíᴻïðᵯᐙᵯòWó|ᐙᵯᐙᵯò9ôᓫᵯ+Ḅ.15.᝞2ᡠ#ᵯ+ᵯMᵯ"ឤR=2R,÷ᔠS2,ᵯ"⊤#ᦪIfᵯ⊤#ᦪIᵯ+,ὑḄ./᳛l2IP1
zS2,ᔠS1ஹS3,ᵯ"⊤#ᦪI஺2,ᵯ⊤#ᦪI12,ᵯ+,ὑḄ./᳛Iø'஺ᑣSû3=PlP'=஺yᶇÿ

416.ᳫ᥅ᔾᜮ᥅ᳫ᝞ᵯ₹Ḅᳫ☠%&'(______Ḅ(*.,ஹ./⚪17.8ᑖ
23ᑭᵨ678
ᡠ:./ᘤᩞ=>2?@ᙠBᵯCDḄᵯE᳛”HIᵯJᵯCឤL6V,2?@MNOP&ḄᵯCL2.5VᵯQRL8C,STUQᘤVWL“20஺2A".1
Y᪷[./⌕]^_ᵯ`6abᙠ67ᵬ
᪾ᑁ.()ᵬ2
Yᵨhbijkliᙠ678
mnᡂ.ᱥᵯ`Ḅqr.()3
sᔠuᐵw,STUQᘤḄSᱏz{|}7⌱“4“ᡈ“8"
.4
qrᵯ`ᵨuᐵ?@BᵯC⊤ᦪr%6V,ᵯ⊤ᢣ┐BTᵯ`mḄᦑ7ᵯ`mᨵᜐᦑ
5
᣸◀ᦑ./sᔠuᐵTSᱏ,ᵯC⊤Ḅᢣ┐ᢣᙠᵯC&2?@MNᐝ7Yᙠ6ᵬm᪗'zḄᵯC
()

5ᵯ⊤Ḅᦪ᝞ᡠᵯ⊤ḄᦪA,Ḅ᳛_W,Ḅᵯ—C.6"ᔠ$ᐵᦋ'()'ᘤḄ+,-ᑮ/01ᵯ23ᵯḄᦪ456789Ḅᵯ᳛᝞:⊤ᡠ.;<=ᦪ>?=>@=>A=ᵯ2/V2.02.83.0ᵯ/A0.340.400.44ᵯ᳛/W0.641.121.32᪷4⊤CDᵯ᳛'ᓄḄFG:ᵨJ;

60.5A,aᵨUQᘤᦋU2?@Ḅᵯ⌕]SᱏᔣST&?@U.(1)ᢥ⌕]qr.ᱥ6()(2)b'zḄᵯ`6()(3)qrᵯ`&uᐵzᜐ}¢᝱UQᘤḄSᱏzᜐ}(AᡈB).(4)SᱏPᔣ¤T&ᵯ⊤ᦪU,?@¥(“U”ஹ“Uᨩ”ᡈ“BU”)(5)¨sᔠuᐵ?B©ᵯC⊤ᦪRªᵯJᵯC«&ᦑ¬;᝞(ᵯ⊤ஹᵯC⊤Ḅᢣ┐ᙳ°±,ᨬ³ᓫḄµ¶·¸:᝞TSᱏP(⊤ᦪᙳº»2¼BUᑣ¾¿L.ÀஹP6⚪20.(8ᑖ)᝞6ÁᵯÂiÃḄ¤LN᩽LS᩽ᙠ6m᪗'ᵯJMÅ᩽ab'AÆÇÈ·ᔣ஺21.(8ᑖ)Li᪗ᨵ“6V3W”É᪵L2᪗ᨵ“6V12W"É᪵஺Ë?ᙠ᝞6ᡠḄᵯ`mᙳMNᐝY᪷[ᵯ`6ᵨhᑜijkliᙠ(6)mqrᐸ.ᱥ6஺

7Îஹ_Ï⚪22.(10ᑖ)ᱥᳮᐶÒ2ÓḄÔᵨ᯼᮱:lOdnPḄ×ØÙ&ÚÛÜᑴÞ᝞6ᡠḄØÙßàm×áâ&ãUᓄḄ6i.¨ᙠ6minᑁnᐰæçÞ2kgḄ᯼×ḄºÙèL4.2X1éJ/(kg࠷),᯼ḄÙRL3XHfj/kg.]ê(1)᯼nᐰæçëìḄÙ>(2)íß6min&ãØÙ×ᡠᔾᦈḄÙ>(3)᯼᮱ç×&ḄÙᦔ᳛.23.(12ᑖ)mÔLÔìðzu×20()kgḄ×ñ25cØÙᑮ100࠷,æçÞ6kgḄóô᯼஺×ḄºÙè4.2x103.1/(kg-࠷),óô᯼ḄÙ3.5xl()7j/kg஺]ê(1)┡᮱ᑁḄ×ᔾᦈḄÙ>ö÷ø(2)óô᯼nᐰæçù'ḄÙ>ö÷ø(3)«┡᮱Ḅᦔ᳛ö÷úὃüᫀ

8ஹ⌱þ⚪1ஹBூ
௃ᙶᙠ᫹᫹ḄᐵᔠᐰᑣᐵS2⊤Ḅᢣ!"#$ᐰᑣᐵS2ᔠᢣ!ᰐ&.()ᐵS2ᔠ*+!,-./0᜜2ᵯ.4◤⌕789:ᵯ;ᡠ=⌱B.2ஹAூ
௃A.ᵨBCDᨨFBCDGHIᑁKᵫBCDMNᑮFFḄᑁKPQGHᓣISTᵨBU⌴ḄWXᩭᦋ[ᱥ]ᑁKᦑA_ᔠ⚪a.B.ᵨbᩩbᩈefg᥅ijklmnoKMᓄqᑁKSTklᦋ[ᱥ]ḄᑁKᦑBr_ᔠ⚪a.C.sFtu᥅ifg᥅ijklmnoKMᓄqᑁKFḄGHᓣISTklᦋ[ᱥ]ḄᑁKᦑCr_ᔠ⚪a.D.ᵨFvwxᢚz{xᢚᜐz{ḄGHᓣIᑁKPQSTklᦋ[ᱥ]ḄᑁKᦑDr_ᔠ⚪a.3ஹBூ
௃}]ᵯ;Ḅᜧ}]ḄᩞᧇஹHஹ☢GHᨵᐵ}]sᵯᵯᐵ=R=}]ᵯ;Ḅᜧ஺ᦑ⌱B஺4ஹBூ
௃A.ᑁKḄᱥ]ḄஹGHஹ᝱ᨵᐵGHrᱥ]ᑁKᜧḄ7¡¢ὃ⇋ᐸ¦¡.ᦑAr_ᔠ⚪a.B.ᦋ[ᱥ]ᑁKḄs§WX¨klBU⌴ᦋ[ᱥ]ᑁKḄs§W©ªᦔḄ$ᦑB_ᔠ⚪a.C.GHIḄᱥ]¬ᨵḄB7$┯®Br᝱rK(¬ᨵᡈὅᐹᨵB$ᦑCr_ᔠ⚪a.D.U⌴Ḅᩩ²¨ᨵGH³$BU⌴Ḅᱯµ¨IGᱥ]¶B·Gᱥ]ᔾᦈBBºIGᱥ]U»·Gᱥ]ᑁKḄᱥ]GHK¼ᑁKᜧḄᱥ]GHI2B½KᵫᑁKḄᱥ]U»ᑁKᜧḄᱥ].ᦑDr_ᔠ⚪a.5-Aூ
௃¾ὶᵯ.Àᨵ7ᩩ.Á7ᜐ᦮8ᵯ.Ãq.ÃrÄÅÆ஺ᡠ=⁚ÈḄÉ!78!Ê/ᐸËḄ!½rÄ"=ᑨÍÎÉ!ḄÏÐWX¾ὶ஺ᦑ⌱A«6ஹAூ
௃ᵬஹÒÓὶ*Ðᙠᵯq3VḄᵯÔsᡠ=ᵯ.ÕᵯqU=3VᵫÖ×ᑮᵯq3Vᵬᵯ;Ḅᵯ

9Iᓫ=0.3A,Òᵯ;ḄᵯIz=0.6A,᪷ÛÓὶᵯ.ᵯḄᱯµᡠ=ᵯ.Õᵯ1=1ᵬ+Iz=0.3A+0.6A=0.9A
ᵯ.ÜὑḄÕl᳛p=ui=3VxO.9A=2.7W.ßᫀ⌱Ao7ஹCூ
௃]ḄáâᨵᐵâãᜧḄäåáã$CâHPᜧnæḄçᜮ⊤☢Ḅáré⊤☢áᜧT⊤☢áêᱏNÐᐭḄ;íîs8ᵯ;¾ὶᙠᵯ.ïᵯ⊤ðêñ[;ᘤsᵯ;A.CâHPᜧ᪷Û¾ὶᵯ;ᑖᱯµêñ[;ᘤsᵯîᓽᵯ⊤Ḅᦪ[ᦑA┯®$B.⊤ðḄêñ[;ᘤsᵯᵯ⊤Ḅᦪ=÷qêñ[;ᘤḄᵯᡠ=ᵯ⊤ஹᵯ⊤Ḅᦪø¼qêñ[;ᘤḄᨵᦔᵯ;í஺CâHPᜧêᱏPNᡠ=[;ᘤḄᨵᦔᵯ;[ᓽᵯ⊤ஹᵯ⊤Ḅᦪø¼[ᦑB┯®$C.CâHîêᱏNÐᐭḄ;íPᜧᡠ=ᵯ.ḄÕᵯ;[ᜧᵯ⊤Ḅᦪî$᪷Û¾ὶᵯ;ᑖᱯµùêñ[;ᘤsᵯ[ᜧᓽᵯ⊤Ḅᦪ[ᜧᦑcúû$u2D.CâHîᵯ.ḄÕᵯ;[ᜧüᵯÔᵯýÕᵯþr[ᵫᵯl᳛ÿP=-ᵯὑḄR᳛ᦑD┯஺ᦑ⌱C஺8ஹDூ௃A.LEDḄ⌕ᩞᧇᐝ!᩽#$%&ᩞᧇᦑA'()*ᔠ⚪-.B./□1ᵯ23Ḅ4ᵨᔾᦈ/□18ᓄᵯ1:;4ᦑB'()*ᔠ⚪-.C.<=>?@A/□1B=CD1EᦑC'()*ᔠ⚪-.D,/□1F/□ᑁHDḄ᪶JKLḄ1MᦑD┯*ᔠ⚪-஺9ஹAூᑖ᪆௃1
<ᱥ&QRST18ᓄᱥ&Ḅᑁ1ᱥ&Ḅᑁ1Uᜧ.ᱥ&<᜜QRᱥ&Ḅᑁ18ᓄST1,ᱥ&Ḅᑁ1Y஺Z[\ᑨ^1MḄ8ᓄ_.2
`ab⍗dDeᓄfb᝱e᝱஺ூ௃A.h#iḄ“kb”F`mnoDḄ`abeᓄᡂḄ`qᦑA⚗'(.B.st`Ḅuvw⏀yzᯚḄ|}~`|~tMfzᯚ8ᑮ`Dt⌴`Ḅᑁ1UsᦑB⚗┯.C.ᩈh#ih#ᑁḄ`f⏀yzᯚ)^ᔾt#ᑁ`abᑁ1UsᦑC⚗┯.D.ᩈḄuv`abḄᑁ18ᓄᩈḄST1ᦑD⚗┯஺ூ௃

10⚪ᩭ·¸¹º»ὃ½/¾NOᦋ'ᱥ\Ḅᑁ]3]}ᓄḄÀÁ⌕ÂÃÄᙠÃÅf?⌕ÆǹºlḄ»ÈÉÊ»ⅾÌḄᱥᳮÇÎ஺10ஹDூÒÓ௃ᵫᵯ´À⍝+ᵯ_()'ᘤÖὶᵯ2⊤°()'ᘤ²³Ḅᵯ2Ø(ᱏifÚ(ᔣb³'ᘤÝᐭᵯ´Ḅ+ÞᜧᵫÖὶᑖ2À⍝ᵯ2⊤ᦪ'ᘤḄᵯ2ßÞᜧᵫ¸àPL¸'ᘤḄâ³ᵯ2⊤ᦪÞᜧ/2V,ᡠO᪷4⚪ÇÀ⍝(ᱏᙠbÚᵯ2⊤Ḅᦪ4V+2V=6VØçbᙠ10sᑁ+ᵯéêÄḄë36J,ᵫ஺À⍝íḄ+¡î=C="2V!6VߟJos=10£2ØR஺36Jᵫᵯ´À⍝à(ᱏᙠ“Ú'ᘤÝᐭᵯ´Ḅ+0,ᵯ´fḄᵯᨬᜧêÄᵯ´fḄᨬᜧᵯ:,U12V…ᨬᜧ=ò=ó'ᦑö┯ø;IJI2V-4VÖὶᵯ´fᔜᜐḄᵯ8üà(ᱏᙠfÚᵯ´fḄᵯ¡/=4V=08A,ᵫ=£⍝10s41OQᑁᘤὑḄᵯW*U/u4Vx0.8Axl0s=32J,ᦑB┯.;,U.12V-6V…3ᱏᙠb78ᘤ9ᐭḄ;ᨬᜧ>8ᵯ?@ḄᨵᨬBᵯC/ᨬB=U==0.6AᵫD=0⍝,K.1U12PR4VxO.8A8ᘤRᐜGHIὑḄᵯJ᳛LM:OPQR=3,ᦑ஺┯.ᱏ_(12V-4V)xO.8A_16ᵫD=T⍝ᐜGHIὑḄᵯJ᳛LM:OX(2V—6VxO.6A-5ᦑD\].11ஹDூ`a௃cdeḄMfgMhᜧᙠᔾᦈᡈlmnoḄfp8eḄqrᓄBc>tᱥvᑁeḄMwxyᨵz{|⁚tᱥv~ḄqrTqrᓄtᱥv⌼ᡂ.ᦑD\].12ஹCூ`a௃A.ᵫ⚪ᵨᵯᘤḄᵯnoᡠT\8ḄᵯnoᦑA┯.WB.ᵫᵨᵯᘤ

11o81B8ᔜ~Ḅᵯoᵫ>ὑḄᵯᾯo᪷£P=7ḄJ᳛ᔜnoᡠT\8¦§ḄᵯCᔜnoᦑB┯.075W15kW^hC.ᵯ¨©B8ὑ0.75ᐗὑḄᵯw=j=i.5kw-h,J᳛puNn'fUnsKwnsoow,0.5t\hᦑC\]

12D.᪷[W=Ptὑᵯ1Ḅ)ᐝ=᳛.=RḄᡠᙠᨴᑁ¡¢ᵯ£¤Ḅᵨᵯ¥ᵨ)¦ᵯ§┡Ḅᵨᵯ¥ᵨᦑD┯.!ஹ©ª⚪13ஹ20Q)F2400rூ௃প8¬F=40r/s,®8¯8<°;4±²ᡠ1sᑁ840r,;4±²ḄᦪMF60s40r”n=----=202r;4±²<᜜Q´µ¶2();4±²<᜜Q20´.ফf¸w¹ᑮᔾbº»᣸bº½ᜐ=ᐵÀÁ᝱zÂÃÄᔣÆÇÈÉ°ÊFQv.ËQv)FÌ☠ÎឋᩭÑᡂḄÒÓzÂÃÔÕᑁ18ᓄST1஺14ஹ'ᵯEூ௃1Ö×᥅ÙuḄÚᴻÜÝ'ᵯ஺ফᐙᵯßàáSᐙᵯRᐙᵯßáSᢝãä:1Måæ=çᓫᵯwḄᵯE஺15>2:329ூ௃iéê2ëÀᔠS2RᵯìRiஹ&᪀ᡂïὶᵯᵯñ⊤óôḄᵯñᵫ=ö=2%ᡠᵫᑖñøùᵯñ⊤úᦪ5&u=£u=&+&3R32ïὶRᵯwὑḄ᳛RU2U2PD/?,+R>3R,^ûS2,ÀᔠS1ஹS3ᵯì&ஹR2᪀ᡂZὶᵯᵯñ⊤óᵯEᵯñᓽ5=U,ᵯý⊤óᵯìRḄᵯýZὶRᵯwὑḄ᳛P'PT+H·+T£+ᓃº&&2%R2%2ᡠᵫþÿ

13u2<_¼_22R216ஹᵯ₹᣸ூ௃᥅Ḅᳫ☠ᜮ,ᑮᳫᔾ!ᜮ"#$%&ᜮ᥅Ḅᳫ᥅'ᵯ"()ᔾ!*ᵯḄᜮ;,-ᵯ₹./᣸"ᡠ1234,-ᵯ₹Ḅᳫ☠5,./᣸.7ஹ89⚪A;<=>C;<3DḄᵯEFᜧ5";<ḄᵯH᳛Fᜧ?@A;<ḄᵯB89ூ௃(1)JK᪷MNOP?@A;<ḄᵯH᳛Ḅ89⌕R"SᔠUVWᑖYZ[1\]ᵯ>V᝞_:(2)2
᪷M\]Ḅᵯ>V"abᵯE⊤de?A;<ḄᵯE"fᵯE&2.5V⌱0-3VḄ@h"iὶᙠA;<3D"%&

14A;qᵯr*st(3)[3]uᐵwxᔠyw"z{|BᘤḄzᱏd⁚ᑮᨬᜧBᜐ"ᦑdeᙠAD(4)ভYᵯ>"ᵨuᐵ";<*"%&ᵯE⊤?A;<3DᵯE"ᵯE⊤ᦪ6V,ᵯr⊤ᢣ┐*{,ᡠ1ᵯ>qḄᦑ$A;<=>ম᣸◀ᦑ"89"xᔠuᐵ"{zᱏ"CA;<3DᵯEᑮᵯE2.5V5"A;

1518ஹª«¬s©H®¯@FᜧA°®±ᑮB«Ḅ²ᵨ{sᑁsூ᪆௃(1)A°ᙠᔣ_¶{Ḅhqª«¬s·A"{sFᜧ"ᡠ1A°ᙠ¸¹º¦»
Ḅ{s$ᵫ½¾º¦5Ḅª«¬s¿ᓄᩭḄᙠẆÁ{sᜧAÂÃ%Äᨵᐵ5"ᡃÇ$ÈÉÊA°Ë{ᩈᙽ{ḄÎÏᩭÐ᧜A°{sᜧAḄ"ᓽA°Óᩈᙽ©HÔÕ"ᩈᙽÖËḄÔ×"{sÔᜧ(2)Vq89qØ,ÙA°(,Ù4Ú☢Ü*,ḄÝ®ᵫ☟ßu¾à{"ᓽA°à{ᑮÚ☢áDḄ®$*,Ḅ"ᡠ1e89$âÁ{sᜧAᱥäà{®Ḅᐵå(3)*,¯@A°(.,ḄÝ®æç"à{ᑮÚ☢áDḄ®èé.,"ᓽe89âÁḄ$A°{s¯@Ḅᐵå(4)89qêëᵨḄᩈᙽ¯@ìᜧ"A°íîᩈᙽ5"ᩈᙽ{ḄÎÏìA"89ïð*ñò"&ë89ᨵìñòḄïð"[1ÈFᜧA°ᙠÚ☢ÜḄÝ®ᩭFᜧA°Ḅ®"()FᜧA°Ḅ{s"FᜧÓᩈᙽ©HḄÕó"Fᜧᩈᙽᙠ¸¹☢ÜzôḄÎÏè[1È·A☢õöh®Ḅ÷Pᩭ·A᥅«"ëᩈᙽᙠ¸¹☢ÜzôÎÏFᜧ(5)ᵫøᩈᙽ±ᑮB«(ᡈ᥅«)Ḅ²ᵨ"ᡠ1ᩈᙽᨬüý_ᩭᙠhqᩈᙽÈ©H÷þ{s¿ᓄ&ᑁூ௃(1)ᵫᵯ>V[ÿᵯḄᵯ3V,ᡠᵯ⊤Ḅ03V,ὶḄᵯᵯ⊤⌱00.6AḄὶḄᵯᘤᔣ!"ᘤ#ᐭᵯ%Ḅᵯ&ᓽᘤ()Ḅ#*+,-#ᑮᵯ%/ᯠ123)Ḅ45#*+6ᐭᵯ%7ᐵὶᙠᵯ%/:ᑴᵯ%.᝞>ᡠ?:(2)᪷Bᵯ%>CDEF᩽7H6#IJK7ᐵஹஹᵯ⊤ஹᘤὶMᑮN᩽ᨬ1ᵯ⊤ὶᙠḄP).᝞>:

16b—Lr^=]-(SM8>^rJ(3)]^#┯*%⌼ᡂᵯᜧcdᵨᵯᘤᙠ6#ᵯ%7ᐵfᜐhi7j᝱ᘤḄᱏfᜐhᨬᜧmḄA).(4)ᱏPᔣno#ᐭᵯ%Ḅᵯᜧஹᵯ%Ḅpᵯᜧ᪷BqrstCDᵯ%/Ḅᵯ&ᓽᵯ⊤Ḅ?ᦪ&᪷BP=PRCDḄv▭x᳛&ᨩ.(5)aஹ{ᔠ7ᐵ}~ᵯ⊤?ᦪᵯᵯ!"ᵯ⊤ὶḄᑖi%ᓽᵯ%ᦑCKi%bஹ⊤ஹᵯ⊤Ḅᢣ┐ᙳᨬᓫḄKᣚᵯḄFN᩽cஹᙠᵨᘤᨵ⌱ᵨ3(P#*+ᘤᐹᨵ⁚ᵨ⌱ᵨ(☢P#*+ᡈ⌱ᵨ3☢P#*+ᘤ}⁚ᵨPᵯ⊤Ḅ?ᦪ¡&!"(☢P#*+#ᐭᵯ%.¢ஹ>⚪ூ᪆௃§Dᵯ¨*©Ḅn)N᩽ஹ)S᩽ª«¬®¨*©ᜧ¯ᢣᡠᢣḄᔣᵯ¨*©ḄN᩽,¢ᢣ±²ᢣ?ᵯḄᔣᡠCDᵯE¨*©Ḅ)ᐭᑣᵯ)F᩽n)N᩽ᙠ´µ᜜´·*KE´µN᩽«¸MᑮS᩽ᡠCDA¹ᜐ´ºᔣ»¼ᔣ᝞>ᡠ?½

17ூ¾௃P¿ÀsᵯÁᵯ%>/ÂÃὶᵯ⊤AiLiᡠᙠÄ%ᵯᵯ⊤A2L2ᡠᙠÄ%ᵯvᱥ6#᝞>ᡠ?:ÆஹÃÇ⚪22ஹ(1)6xlO7J
(2)2.52X106J
(3)4.2%.ூ¾௃(1)᯼ÉᐰËcÌÍḄνQ=2kgx3xlO7J/kg=6xl()7JIA(2)»ᔾᦈḄν஺ᔾ=cwA/=4.2x103J/(kg°C)x1O,kg/n?x10x1(y3m3x(8O࠷-20࠷)=2.52xlO6J(3)᯼᮱c»ḄÎᦔ᳛:@"100%=2-52XYJ=4.2%.Q6xlO7Jூ¹Ó௃(1)§D᯼ḄÔÕÎmᑭᵨC×Ø᯼ÉᐰËcÌÍḄÎ;

18(2)§D»ḄÔÕᓣÜḄÝÞmᑭᵨᔾÎßà×»ᔾᦈḄÎ(3)c»ḄÎᦔ᳛h»ᔾᦈḄÎËᧇÉᐰËcâ«ḄÎãä.23ஹ(1)6.3xlO7J
(2)2.1xlO8J
(3)30%.ூ¾௃(1)┡᮱ᑁ200kgḄ»ᔾᦈḄν0¿=஺ÀQ—)=42x1()'J/(kg•࠷)x200kgx(1()()࠷-25࠷)=6.3xl07J(2)6kgçè᯼ÉᐰËcâ«Ḅν2ᦇ-m^q-6kgx3.5xl07J/kg=2.1xlO8Jবê┡᮱Ḅᦔ᳛½=axl00%=6.3xl°½Jx]%=30%zz00Ql2.1X108Jð½প┡᮱ᑁḄ»ᔾᦈḄÎK6.3xl()7j
ফçè᯼ÉᐰËcâ«ḄÎK2.1xlO8J
(3)ê┡᮱Ḅᦔ᳛K30%.