2021年辽宁省丹东市东港某中学中考物理模拟试卷（附答案详解）

《2021年辽宁省丹东市东港某中学中考物理模拟试卷（附答案详解）》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
ḕὃᱥᳮᔁஹᓫ⌱⚪ᜧ⚪ᐳ6⚪ᐳ18.0ᑖ1.ᑡ!ᦪ#ᨬ%ᔠ'▭Ḅ*A.ᱥᳮ+,-./0ᙢḄ23ᜧ4*1sB.ᱥᳮ+56ᙠᙢ☢/9ᙢ☢Ḅ:;ᜧ4*6PaC.<ᨔᵯ?@ABCD2ḄᵯE4F0.54D.GᜩIJKᑁḄMN4F1CTC2.ᑡᨵᐵQRSḄTUAVḄ*A.GᜩᡭXᵯYZ[ᑮḄ“^M”*YZᑁḄ`aM<ᓄcᡂḄB.fᜩgᡝ/ḄYi*ᵫk᜜IMḄ`aM⍗nopcᡂḄC.ᑭᵨ

1C.ᵨḄ§¨᦬£ª~ḄJD.᦬£2~Ḅ*ᵫ«¬®Ḅ5.᝞ᡠᩞᧇ±Ḅ²ª³´µ4¶8·6ᙠ`5ᙢ☢/ᙠ¸¹FDᵨᱥᙽ4ஹB-•¼ᔣ¾tᒴ§ÀÁ¬ᑡTUAVḄ*A.ᱥµBÃᑮḄŶᙢ☢9BḄÅᢝ¹*95⊝¹B.ᱥµ4ÃᑮḄ¸¹¶ᱥµB94Ḅ᥅ɹ*95⊝¹C.ᱥµ4ÃᑮḄ᥅ɹ¶ᱥµ49BḄ᥅ɹ*95⊝¹D.ᱥµ49BḄ᥅ɹ¶B9ᙢ☢Ḅ᥅ɹ*9±ÊDᵨ¹6.ᑡTUAVḄ*A.ËÌஹ`̶ᜩᯠMÎ*ÏЮÌÑB.Ò@Óᱏ/ḄᨔµÕ*ᵨÖ×ᩞᧇᑴᡂḄC.ᑭᵨ᪶ÚÛᩭ~ᵯ2᪶Ýᚮ~®ḄQ᪶Ý*ÏßàᑴḄD.Ö×ᩞᧇÏßᵨᩭᑴDᵯáᐗãäஹå⌱⚪ᜧ⚪ᐳ4⚪ᐳ12.0ᑖ7.æçᵨ᝞ᡠèéêë¼ÄF500NḄᱥµìíᡠᵨ¸¹F150N,îáï¬Ḅ§¨*0.4ni/s஺ᑣᑡTUAVḄ*A.¸¹9ᱥµtḄò᳛*50WB.10sᑁ¸¹tḄòF600/C.ôèéêḄ@õᦔ᳛F83.3%D.¬èé÷ÄF100N8.ᙠ᝞ᡠᵯøRoஹ%FúûᵯüFè¬ÛüᘤýᔠXᐵS,þè¬ÛüᘤḄèᱏPᔣè¬2ªᳮÿᵯ⊤Ḅᦪᓄᵯ⊤Ḅᦪᑖᵨ/ஹU1ஹஹ&⊤ᵯ⊤ᦪᓄᑖᵨ4ஹZU1ஹ44ஹ⊤஺ᑣᙠᱏPᔣḄᑡ!Ḅ"#$%2⚓ᐳ36⚓

2B.ᵯ+,-᳛/C./1/23D.%1//67867ᙠ9:;<=ᘤ?〉ḄABC/ᳫ4FGᙠA☢᝞JᵬᡠMᙠ/ᳫNOPQᙽB#9STAᜧ,WXᶍZ[\]$^_=ᘤ`a9:B_=ᘤ᎔cᵬᩭ᝞Jeᡠᑡ!Ḅ"#$A.ᵬஹegJ4hᑮḄGjklB.eJMmnZ[Ao=ᘤpḄqr/C.eJMmnZ[=ᘤos☢Ḅqr3D.eJMmnZ[Ao=ᘤpḄqjᓄltᵬஹegJ4hᑮḄGju10.᝞Jᵬᡠᵯ+x᪗ᨵ“4/2஻”᪵Ḅ/LᵯRḄᵯ-᳛Bᑴ᝞JeᡠḄJᵯᵯqᢝ6V3ᓃ"ᘤᵯRḄ80,ᑡ!Ḅ"#$A.LḄJJeḄaB.abJḄᵯq4VC.ᔠSஹS,nS1ᘤḄᱏᵯ⊤ᦪ0.44ᘤ2-᳛1.121VD.¡ᔠSஹS¢ஹ52,ᘤḄᱏᵯq⊤Ḅᦪ2Vᵯ+¤-᳛3/¦ஹ§¨⚪#ªᜧ⚪ᐳ10/⚪ᐳ22.0ᑖ$11.«OᎷ᱆᱆¯°Ḽ/²³«´µ¶·/¸¯ᙠ+¹º»¼¯½¾᯿ᱥ+ÁḄ᪛"Ḅ஺Ã⚔Ḅ☢]"50Å2,ᜧÆÇᵨᙠÃ⚔¹Ḅqj"12.TÈ2ÉÊḄËÌ2ḄËÌḄÉÊḄËÌḄ

313.᝞Jᡠ"¸ÍÎÏÇÐḄÑJ஺᝞ÒÓ¸ÍÎÔÕÖ×"2400r/znin,ᑣØÙÚÛᑁÝᡂßÐà-a஺14./²_OáâḄ∑äåᙠæçè(/=10cm)ë18cmᜐᐝî¹ïᑮäᯚ᎔ñஹḄòᨎḄᯠ^õᙠ∑äæçè4ö°♦søùåcOßúûüèᱏᐝî¹äᯚḄýþ(᝞Jᡠ1)
ᙠᐝᑮᨎḄᐝ஺15.“6U3W”Ḅ!"#$ᡧᵯ'()ᙌ+,-0.12ᑣ#$ᡧ/0121m34ὑḄᵯ6-_]■,ᵯ'()ᙌlmin;Ḅ<=------------/016.>?@AB᱄DEFGᨵ30ᣊJ஺KᣊJḄL=M-5kg஺>?NOPQE10mRᜐḄF஺᝞UV>?WXYḄᵨ[E\ᱥ^Ḅ_᳛abE\ᱥ^L=cdḄᐵfUg஺ᵫU-iN6OᙢkᢇJEFKmnEᣊ஺
KmopqdVpqdḄrᑣᨬOtᡂE\vwxyz{ᙢᡠᵨḄ}qd-s(g=10N/kg)஺17.᝞Uᡠ~ᵯᵯᵯឤJ(4V1W)ஹL(2V1W)2ὶᵯ+ᢝᵯ⊤ᵯ⊤t஺ᔠᐵSqᐸ6/0ᐝᑣqᵯ⊤~ᦪ-Vᵯ⊤Ḅ~ᦪ-A.18.᝞Uᡠ~ᵨᵯᘤᓫ¡ᙠᵯ6⊤1230#3G¢ᵯ6⊤Ḅ£¤£i1500£qᵯ6⊤~ᦪ-kW-h,ᑣ¢ᵨᵯᘤᵯ_᳛VW.¥4⚓ᐳ36⚓

419.¨©0ª«¬ᜓᩭ°⌴²³᝞᎔©µ¶ᑭᵨᩭ°⌴²³஺¸¨©¹º»ᑣᑭᵨa¼½ὶfᩭ°⌴²³W¾¨©ᡠᜐḄ¿À஺Á⌱ÓᵯÅ?”ᡈ“ÈÉ?”Ê20.᝞Uᵬᡠ~ᵨÌ'ÍÎÏÌÍÎÐᡂḄÍÎÐXᓣᱥÒÓÔFÕqdtḄᓄᐵf᝞U×ᡠ~ᱥᓣḄØÙ஺ÕqdtᓄḄᐵf᝞UÚᡠ~஺Ûᑗ᥅Þßàᙠ1s%2sᑁÍÎÐḄ(âᦔ᳛-80%஺1
0%1sᑁᱥ4äᑮiÁ⌱Óå⊝Ô”ᡈ“çå⊝Ô”ÊḄ2ᵨè2
ls%2sᑁÓÔFḄ_᳛
ᱥ4ḄÔé#-900N,ᑣXᓣᱥᒴØᓣqÍÎÐḄ(âᦔ᳛-oëஹ2U⚪Áíᜧ⚪ᐳ3#⚪ᐳ9.0ᑖÊ21.᝞US'VSðᡠᡂḄñᙠUòóxS.¾PḄÏÌᯖõ஺-------------------------gr•22.᝞UᩨᩚBõᢞᱥG,⌕ûᩨᩚᙠU~¿Àå⊝ñᙠᩨᩚòóᡠ◤⌕ýþḄᨬ#ḄÔxòó'Ôÿ"
%஺

523.᝞ᡠ4ᢞᙠḄᩩB&!ᵯ#ᵨ%&'(ᵯ)⌕+:(1)-ᔠ/ᐵ1ᦪ3ᜧ5(2)673ᘤḄ6ᱏ6ᑮᨬ<=>ᦪᨬᜧ஺?ஹABCD⚪(Gᜧ⚪ᐳ6I⚪ᐳ39.0ᑖ)L6⚓ᐳ36⚓

624.NOPQ
RᵨSḄᔾUVWIXYZᵨ᝞ᵬஹ\]ᝅ_ᐰaYḄbcdeCD஺(1)◀NgᡠhḄABᘤᩞ᜜k◤⌕Ḅmnᐹᨵ
O(2)qrXbABbc1/sABt◞2ᑖvmwxQ
RᵨSḄyzᦪ{|}ᙠ⊤g஺>/min02468109/࠷51015253051525354555(3)᝞UgL6ᑖvyzᦪ࠷o(4)U10ᑖvQᔾᦈḄUm______(⌱“ᜧ”ஹ“I”ᡈ“”)RᵨSᔾᦈḄUm஺(5)ᑖ᪆ᦪ{ḄᔾUVRᵨSḄOU஺25.CDᡂḄAB>I⌱NwᙽᯖḄ஺(1)NmḄᯖw¡eᐝ£ᔣ¥¦⁚ᐝ¨©cªᑮᐝ¨«¬ᑮwḄᐝᦿ(᝞ᵬᡠ)¥Ḅᯖf=cm.(2)᝞\b¯ABᘤᩞ°±7Ḅ²³´µ¶᪵¦⁚¸¹Vᙠᐝ¨«¬ᑮºᨎḄ⌼ᡂ«½¾¿ḄÀÁ஺(3)᝞Â∑ÄᙠᐝᐹÅḄ4ᜐᐝ¨ᙠBᜐ¬ᑮNÄᯚºᨎḄ¾È∑Äᵫ4ᜐᔣʱ7ËsᑮCᜐÌxᙠᐝ¨«(ᦈᑮºᨎḄÍÈᐝ¨ᔣ

7Î⌱“Ê”ᡈ“<”Ϧ᦮ᐝ¨±7ËS'_____Ó⌱“>"ᡈ“=”ÏÖxᡂ᎔Ø_____Î⌱“Ùᜧ”ஹ“ÚI”ᡈ“ᜧ”ÏḄÖḄᱯÜÍᵨᙠÎ⌱“᯿aÞ”ᡈ“ᢗàá”Ï஺26.CDåæᑁèéᱯÜḄABÎPëxுPxÏ஺Î1ÏNîAB¾¿ïðUgåæᨬ¯ᵨÎ⌱“ᨵ⁐”ᡈ“´⁐”ÏḄQ஺Î2Ï1gUÊóåôõ9cm,<óåôõ14cm,ᑣUüèýᑮḄåæéPa.Î3ÏWxAB>ÿ
ᙠU☢Ḅ⌲o4"#$ᜮᙠ&2ᡠ)*ᑁ,-.Ḅ8ஹC2345ᑮU☢h᪍⌱9“<”ஹ"=”ᡈ“>”"ABCẆE*FGH*cᐵJ஺5"ᵨ&3ḄOᘤQRS$E*ᑁ,FGᵫURVWaஹcZ*Ḅ[ᐵJPa_____Pc⌱9“<”ஹ"=”ᡈ“>”"஺27.`abcᵨ&ᵬᡠ)e3fg“hijcklᦔ᳛”ab஺oᶍqrs᥅u"পabwx⌱9“yz”ஹ“{”ᡈ“|}”"~ᔣᒴhᱥ*ᓣ஺2"ᦋijrᓣᱥ*fgabᦪᑴ᝞&ᡠ)Ḅ&ᑖ᪆R¡ᓣᱥ*ᡠ¢Ḅr£¤ij¥rijcḄklᦔ᳛¥஺3"ᑖ᪆&Ḅ4¦R¡ᓣᱥ*ᡠ¢ḄrBN஺4"ᙠ§abḄ¨Ạᵨªij«¬Cab᝞&ᡠ)஺®ᵨªij¯Ḅ஺AஹRSḕBஹRSḕ²CஹRSḕ³´஺ஹRSᦋḄ~ᔣµ8⚓ᐳ36⚓

8(5)abcᑖ¸ᵨijr£Ḅᵬஹijcᓣ£Ḅrᱥ¤ᵬஹijcḄklᦔ᳛(⌱9“£”ᡈ“£”)஺28.ᱥᳮab¼`c⌕h¾¿Ḅ[Àfg᝞Áab(1)#ᜩ{ᙠ{abÃÄÅÁᩭ#ÇṹḄÉÊ᪗ÌḄÍΫÏ⁚{⊝ÒÓᜩ{{⊝஺(2)ab¤#¾¿ᙠᜩ{ÔÕÖ×ØÙṹsÏ⁚ÇṹhC¾¿ḄÚÛÜᜩ{{⊝¤ᡲÕḄÙṹsÇṹᙠ᪗ÌḄ23᝞&ᵬᡠ)ᑣ¾¿ḄÚÛB--------g஺(3)ᵨÛßÛà40mLᯠÄ#¾¿᠒᠒ãäᙠ᝞&ᑣ¾¿Ḅ[Bkg/m3C(4)åäᨵÛ߫تçèQRᢥSÁêëìᡂabhî¾[஺জᵨÏðḄᜩ{h¾¿ÚÛmiñঝ#〉Û᎔ᐭçèö÷ÚÛØ2ñঞ#¾¿ᵨùúJð#¾¿àÄØû᪗üᜐöU¤çès÷ÚÛ3ট¾¿[⊤
p=O2ᑖḄ(“"ᜧ”ஹ“"&”ᡈ“()”)஺

929.&./.0ᵯ2Ḅᡠᵨ./56ᵯ782.5V,ᡠᵨᵯ9ᵯ7ឤ84.5V,;<ᵯ=᝞?ᵬᡠA஺(1)BᙠDEFᘤHIᵯJ⊤᝞?LᡠAᑣNOᩭBḄQRS஺(2)TUVNᵯ=WXᔠZᐵHI&./(\ᵯJ⊤ᢣ┐"_ᵯ7⊤ᢣ┐`a(bcdᦑfḄghijS஺Aஹ./.0kBஹᵯJ⊤Nlm=Cஹᵯ9Nn(o஺ஹ.pNlm=(3)qr&./ᙠ(sᵯ7OtROḄᵯJu./ᵯ782.51/TwHᐝyᵯJ⊤᝞?zᡠAᵯJ84,y&./ᵯ280஺({ᶇ}&ᦪ)(4)&ᙠᨵᵯJ⊤ᵯ2ḄO;<?ᡠAḄᵯ=ᵯ9ᵯ7b)2ᘤ/?2Ḅᨬᜧ256ᵯ7U⚣Ḅ&./Ḅ56᳛⊡ᐙ᦮জXᔠSSikZS2,⁚b)2ᘤ&ᵯ7⊤Aᦪ8&./TwHᐝ@(Zᐵ¡᝱))2ᘤ7?2Ḅᱏ(“{ᢝ(b”ஹ“ᑮᨬ¦§”¨10⚓ᐳ36⚓

10ᡈ“ᑮᨬ«§”)⁚ᵯ2Riᑮᔠ〉Ḅ28Ro,yᵯ7⊤Aᦪ8Uiঞ{ᢝᵯ2Ḅ2()b)2ᘤ/?2Ḅᱏ(“ᑮᨬ¦§”ᡈ“ᑮᨬ«§”)qrᵯ7⊤Aᦪ8᜜&./Ḅ56᳛⊤
8஺5=(ᵨ·¸⊤A)஺¹ஹ<º⚪(ᜧ⚪ᐳ3&⚪ᐳ20.0ᑖ)30.¾ḼÀÁIÂḄÃÄÅÆᡃÈÉᩭÉÆÊËj9ÌÍḄZHᐸËẆHḄÐËÑÌÍSÒÓÔᧇ8bÖ஺×ØËÑÌÍÙḄḼᙢÛ☢Ý80.4m2,Íàáâ81200kg,ÍᑁᨬçièéêᨬᜧÍë8180km",îïÔᧇᨬçiðñ1000m,ÍðñòᑮḄ2Ö8ᐸÆÖḄ0.08ó(ôêḄâ850kg,g=ION/kg,qᑖ÷=1.4xlO'j/kg):(1)èéêWÍ☟úûᙢ☢Ḅ7ü஺(2)èéêÒᨬᜧÍëðñᱫþÖḄ᳛஺(3)×Øðñÿ
Ḅᦔ᳛50%,ᨬḄ஺31.ᨵᵯ᮸!"#ᨵᑭ%┝'(ᱥ
Ḅ⃩+ᡂᑖ"./0᮸1234ᕡḄ⃩+6"#789ᑴ;ᐵ=>?@ஹB@CᢱE"ᐸGᓄᵯIJ᝞JᡠM"ᵯNᵯOP220R&ஹ/?2ᙳPEᵯW"XYEZ᳛P500W,/?2ḄW\P1210஺]^(1)%ḄW\abফB@ᢱdelOminᡠkὑḄᵯmab(3)n2oEpᜫ"rᵨ?@ᢱE0t2Lvw20xᓣ?ᑮ100{◤⌕E~b

1132.᝞J@ḄᵯI"ᵯNᵯOP36V,/ᢝ2஺EᵯWḄW\P300,/?2PWᘤ"ᐸW\ᓄP050஺"ᐕ78Ḅᵯᜧ஺]^(1)&ḄᨬᜧZ᳛b(2)tᱏPᑮ"/?2CᵯOP6V"7ᵯ5m"ᵯ᦮ᵯIḄZab(3)ᙠ⁚ᱏPḄ8
"Wᘤ/?2m¢ᑮḄᨬᜧZ᳛ab£12⚓"ᐳ36⚓

12¦ᫀ¨©᪆1.ூ¦ᫀ௃cூ©᪆௃©^ஹᱥᳮ¯w°±²³ᙢḄᜧµ0.5s,ᦑ4┯¸¹Bஹᱥᳮ¯º»ᙠᙢ☢²ᙢ☢ḄO½ᜧµ^p=^==50Pa,ᦑ2┯¸¹¾S0.2mx0.3mCஹ¿ᨔᵯÁÂÃdeḄᵯµP0.54Äᔠ=▭"ᦑCÂǹDஹÈᜩÊËᑁḄ@µP20?"ᦑ஺┯¸஺ᦑ⌱^Co✌ᐜ⌕⌱⚗
ÑÒḄÓᱥᳮᨵÔÕḄÖ©"%⌱⚗
Ḅᓫ"᪷Ù◤⌕ÚÛÜÝḄᣚßᡈáᣚ"᣸◀äåæ=▭ÜçèéḄ⌱⚗"ê1Äᔠåæ=▭Ḅ¦ᫀ஺ë⚪ὃîåæ
ÃïᱥᳮḄðñ"òᔠåæḄÖ©¨ᱥᳮᓫḄóô"ê1Äᔠ=▭Ḅ⌱⚗ᓽ஺2.ூ¦ᫀ௃Dூ©᪆௃©^ஹÈᜩᡭ;ᵯ÷øᑮḄ“ú”÷᜜Ḅvý¿ᓄþᡂḄ"ᦑA┯¸¹8ஹÿᜩ
ᡝḄᵫᑁḄ⍗ᡂḄᦑB┯Cஹᑭᵨ!"#⌕ᑭᵨ%&ᓄᔾ)*!"ᵫ᝱,ᡂ-᝱ᦑC┯஺ஹᔛ01234ᜮ6“89”ᵫ᝱,ᡂ-᝱;<-3=ᦑ஺>?஺ᦑ⌱A஺஺ᱥCᵫ᝱DE,F-᝱ḄGHIᱥCᵫ-᝱DE,F᝱ḄGHIᓣᱥCᵫ᝱,F᝱ḄGHIᓄᱥCᵫ᝱,F᝱ḄGHI&ᓄᱥCᵫ-᝱,F᝱ḄGHIᰚᓄᱥCᵫ᝱,F-᝱ḄGHI-஺LMᱥ᝱,ᓄᰚᓄஹ&ᓄஹᓣᔾ)Ḅ஺-ஹᓄஹN)Ḅ஺O⚪ὃRSᱥ᝱,ᓄḄTᐵVWX⚪YZ[\ᜧ஺3.ூaᫀ௃B

13ூd᪆௃dA4ஹᙠghᑮḄj,kSᵫ<ḄᱥlmnḄᐝpqrnᑮ2sᢚnᦑO⌱⚗\vᔠ⚪x஺8ஹy☟Ḅ☢T|?஺ᦑ⌱AD஺(1)ÑÒḄäßᱯæᑖçAÒèஹà[ஹÒ⁐q\é[êëÑÒḄÒèᢣÑÒḄìíᵫáâ⚣᳛ðñà[ᢣÑÒḄòóᡈᜧÅá³õö2ÑlḄö÷ᨵᐵÒ⁐ᵫ2ÑlOùðñḄßᱯឋ஺(2)ÑÒḄ☠C-lஹlஹl¯üýFÑÒḄCÚ\ÜÑ஺(3)ÑÒᵫᱥlḄáâãs஺þ14⚓ᐳ36⚓

14ᑖḄᱯḄᩩ⚪஺5.ூᫀ௃Bூ᪆௃4ஹᙢ☢$BḄ%ᢝ'()Ḅ*'+ᱥ-B.ᑮḄ*'ᜧ123(245$6⊝'ᦑA┯:;<ᱥ-4.ᑮḄ='ᱥ-8$4Ḅ᥅?'@ᔠB'6⊝ᩩ45$6⊝'ᦑBCD;Cஹᱥ-4.ᑮḄ᥅?'ᱥ-4$8Ḅ᥅?'EᵨᙠHᱥ-I245$6⊝'ᦑC┯:;஺ஹᱥ-4$BḄ᥅?'B$ᙢ☢Ḅ᥅?'Jᔣ3LMNOᱥ-ᡠQ245$3REᵨ'ᦑ஺┯:஺ᦑ⌱B஺(1)3REᵨ'Ḅᩩᜧ13(ஹJᔣ3TஹEᵨᙠHᱥ-IEᵨᙠL5ᩩUVI;(2)6⊝'Ḅᩩᜧ13(ஹJᔣ3TஹEᵨᙠL5ᱥ-IEᵨᙠL5ᩩUVI஺⚪ὃX6⊝'Y3REᵨ'ḄZ6⊝'Y3REᵨ'ḄZ[⌕ᙠ)5$6⊝'4EᵨᙠL--ᱥ-IḄH';3REᵨ'4EᵨᙠHᱥ-IḄ'஺6.ூᫀ௃Dூ᪆௃4ஹ^_ஹ`_ab_cd_ecc2fḄ

15z-2®᧕zᵯḄᱥ-¦«¬-zᵯឋ_°)z-Y«¬-+±Ḅ¦yz-஺yz-ᩞᧇᨵ³´µᱯḄ¶_᪷¨yz-ᩞᧇḄᱯ·ឋ¸ᑴᡂᱯ·Ḅᐗ¹᝞stuᱏIḄᨔ-x(;(3)᪶_ᑖª»H¼ᑖªH¼T2T½ὅ[⌕ᵨᙠ᪶Tᚮ¿ÀὅᵨᙠÁ¿;»[⌕ᵨᙠÃÂI;᪶»ÄÅ᪶T;(4)Ç´ᵯᐗd4⌕ÈᵯÉÊ1ÊËÌQÍᵨz-஺Î⚪ὃXᱥᳮпḄ5bᵨÑÒyz-Yz-ḄᱯÓYᵨQO_cḄᑭᵨ45⍝Õᔠ⚪஺7.ூᫀ௃ADூ᪆௃4ஹ='$ᱥ-×Ḅ¶᳛P=y=y=Fv=150/VxOAm/s=60W,ᦑA┯:;Bஹᵫç=è10sᑁ='×Ḅ¶W=Pt=60Wx10s=600/,ᦑBCD:Cஹᵫïèᐔ=4,ñòóḄtôᦔ᳛öx100%=,x100%=øx100%=WHr5rTinx100%=x100%«83.3%,ᦑCCD;DஹᎷ2ýþ*᥅?ᑣ
Ḅ=nF-G=4X150/V-500/V=100W,⚪ᨵ“!᥅#”%&ᩩ()ᦑ
Ḅ+,100N,ᦑ஺┯0஺ᦑ⌱AD.পᑭᵨP=?=᜼=F"9:;ᱥ=>Ḅ?᳛A(2)ᑭᵨP=?910sᑁ:>Ḅ?AবᵫIJKn=4,ᑭᵨ4=^=M=N=O9
PḄQRᦔ᳛AT(4)ᐜᎷW!᥅#)ᑭᵨ!᥅#XF=A(G+G)9
Ḅ)Zᑖ᪆]▭_`aḄ
Ḅ஺b⚪ὃdefᵨ
PXgḄ:ஹᨵᵨ?ஹT?ஹ?᳛!QRᦔ᳛Ḅi)ᑭᵨjP=?=?=~lᐵn஺o16⚓)ᐳ36⚓

168.ூtᫀ௃BDூw᪆௃wᵫᵯyIJK)zᔠ|ᐵS,RoஹRiஹR2ὶ)ᵯ⊤ᓃR1Ḅᵯ)ᵯ⊤/?2Ḅᵯ)ᵯ⊤ᓃ!R2Ḅᵯ!)ᵯ⊤ᵯyḄᵯ஺4.W
ᱏᵯyḄᵯᑖ/ஹᑣZJU]=//?!-FR1=(7-r)&=4/R1ᓽo=%,ὶᵯyTᵯ,ᔜᑖᵯ!)ᡠ¢)AU=(U-I'R-I'Ri)-(U-IR-/%)=(/-I'XRo+&)=஺&/')&=2O0zl(Ro+Ri),ᓽ¦=&+8,AU=(U-I'R)-((J-IRo)=(/-I')R=AIR,ᓽ=R,3000oᑣo+¨=)ᦑA┯0AAlAIAlBCD.¬
®ᘤḄ
ᱏPᔣa
X,®ᘤ±ᐭᵯyḄᵯ®ᜧ)ᵯyḄTᵯ®ᜧ)ᵫ/=£JK)ᵯyḄᵯ+)ᓽᵯ⊤Ḅµᦪ/·+)ᵫ஺=//?JK)R஺Ḅᵯ·+)&Ḅᵯ·+)ᑣᵯ⊤ᓃḄµᦪ(A·+)ᵯ⊤¹Ḅµᦪ,ᵯºḄᵯ·»Ḅ!%Ḅᵯ)ᵯ⊤ᓃḄµᦪ,ᵯºḄᵯ·»¼Ḅᵯ)ᡠ¢)ᵯ⊤Ḅµᦪ/½¾)ᵯ⊤ᓃḄµᦪg½¾)ᦑ஺ÀÁAᵫ½¾!/·+JK)Ãᜧ)ᦑC┯0AᵫÄ=[//JK)ᵯyḄT?᳛+)ᦑBÀÁ஺ᦑ⌱BD஺ᵫᵯyIJK)zᔠ|ᐵS)&ஹ&ஹὶ)ᵯ⊤ᓃÆḄᵯ)ᵯ⊤//?2Ḅᵯ)ᵯ⊤ᓃÇ!/?2Ḅᵯ!)ᵯ⊤ᵯyḄᵯ஺(1)᪷ÉὶᵯyḄᵯᱯË!ÌÍÎÏᑖ⊤µÐÑஹÑஹ¨Ḅᜧ+)ᯠÓÐÔὅḄᜧ+ᐵÖA(2)᪷É
ᱏḄJK®ᘤ±ᐭᵯyᵯ®Ḅᓄ)᪷ÉÌÍÎÏJKᵯyᵯḄᓄ!&ஹ&Ḅᵯᓄ)ᑭᵨὶᵯyḄᵯᱯËJK/?2Ḅᵯᓄ)ᯠÓÐÃḄᓄ)ᑭᵨP=U/JKᵯyT?᳛Ḅᓄ஺b⚪ὃdeᵯyḄ᝱ᑖ᪆)ÙÚᑮὶᵯyḄᱯË!ÌÍÎÏḄÜᵨ)ᑖÝᵯyḄÞ

17±ßà!ᵯ⊤ᡠḄᵯyᐗ(âᐵn஺9.ூtᫀ௃BCூw᪆௃wAஹᵫIKᵬI4᣸|æḄ=ç+)᪷ÉèéêëìᳮFî=ïKᵬI4ðᑮḄîᜧ,ñI4ðᑮḄî)ᦑᨴ┯0A8ஹñIóôõö÷)4ᱥ=øùî)ú᣸|æḄ=ç+)Bûüýæᜧ)ᡠ¢8aþ)B᣸|æḄ=ç)ᡠ¢᣸|æḄT=ç+)ÿᘤ
☢᪷p=pghᘤḄᦑ8Cஹ
!"#$%&☢Ḅ'()*+ᘤஹஹᳫ-./0ᙽḄ23'ᵫp=3ᙠ☢7(8ᘤ&☢Ḅ(ᦑC஺ஹ!ᘤḄ:;<ᑣᘤḄ'ᓄ?*+᣸AḄ3'ᓄ?*+ᩈᙽCᑮḄE'ᓄ?Fᵫ+ᘤ
GHᑖᙠᘤḄJKLḄᘤḄ'+Ḅ3'ᡠ-
!"#$%ᘤḄ'ᓄ?+ᵬஹO
4CᑮḄE'Qᦑ஺┯S஺ᦑ⌱UBC஺(1)᪷YE=P/\ᑨ#ᵬஹO
4CᑮḄE'Ḅᐵ_(2)
!"#$%ᑨ#aABᱥeḄEfghiᑨ#a4B᣸AeḄᓄj☢Ḅᓄ᪷p=pg/iᑨ#aᘤḄᓄ(3)-᦮emẆopᑖ᪆ᵬ
ᘤr&☢Ḅ'ᜧᐵ_(4)!ᘤḄ:;<ᑣᘤḄ'ᓄ?*+᣸AḄ3'ᓄ?*+ᩈᙽCᑮḄE'ᓄ?஺t⚪ὃwxyz{|}ᳮஹᱥeḄEᩩஹ'ḄឋḄᵨC⌱⚗Ḅᑨ#⌕-᦮emẆop᧕┯10.ூᫀ௃BCூ᪆௃U(1)ᵯRḄm80GGᵫP=?=u2x?¡¢ᵯḄP-U¥¦}Ḅ§ᱥ%ᦑamᵯḄ¥ᦑA┯S(2)a©b¥Ḅ«8ᵫ¥¡¬jᵯO®Ḅᵯ*¯ὑᵯ±᳛*ᓽ´18⚓ᐳ36⚓

18UR=ULPR=PLᵫR=q¡¢%=R=80,¬¸¹ᐝ8ḄᵯU&!=ᗞ=8஺ᡠ-½8¬¸¹ᐝ¬O®Ḅᵯm4V,ᡠ-ᵯO®Ḅᵯm4U,ᦑB(3)¾ᔠSஹS2,#AOᵯÀὶÂᐭᵯÄᵯ⊤ÆᵯO®ḄᵯᵯÇ⊤ÆȦᵯÄḄᵯÇÉᵯÇ⊤Êᦪm0.448ᵯO®ḄᵯU=/R=0.4AX8஺=3.2V,ÀὶᵯÄ2ᵯ*+ᔜHᑖᵯÍj½8ÎÏᘤO®ḄᵯU&=U—UR'=6K-3.2V=2.8V,½8ÎÏᘤḄᵯ±᳛UP==2.8Vx0.44=1.12”,ᦑC(4)Ð8¾ᔠSஹSiஹS,¬jᵯÑὶÒ©ÎÏᘤÀὶÂᐭᵯÄᵯ⊤Æ2ÑὶHᑖᵯÄḄᵯÉᵯ⊤ḄÊᦪm2V8ᵫ¡¬jᵯḄP-U¥ᙠ«ÓJ᪷P=U/¡½8Ȧ¬ḄᵯÇᜧ+ȦᵯḄᵯÇ᪷ÔÕÖ¡½8¬Ḅᵯ+8஺᪷ÑὶᵯÄᵯ<Ö¡ɬjᵯḄ)m808¬jᵯÑὶÒḄᵯm4஺᪷ÔÕÖ¡¢½8ȦᵯÄḄᵯÇm/'=Ø=ᔠ=0.5/1,ᑣ¬jᵯḄ*8ᵯÄḄᵯ±᳛mUP'=U/'=6Ux0.54=3W,FÙ▭L¬Ḅᵯ+80,ᡠ-ÑὶÒḄᵯ+40,ᡠ-ȦᵯÄḄᵯÇᜧ+0.54ᑣᵯÄᵯ±᳛ᜧ+3W,ᦑ஺┯S஺ᦑ⌱UBC.(1)᪷ᵯ±᳛ÛÜP=?Ýᔠ§ᱥ%ḄឋÞᑖ᪆ᵯḄP-U¥Ḅᱯ¡àᵯḄ¥(2)a©b¥Ḅ«8ᵫ¥¡¬jᵯO®Ḅᵯ*¯ὑḄᵯ±᳛*ᵫR=?¡¢¬jᵯḄ*áGâã䬸¹ᐝ8Ḅᵯå桬ᔲ¸¹ᐝáGâ¬O®Ḅᵯ(3)¾ᔠSஹS,#ASiOᵯÀὶÂᐭᵯÄᵯ⊤ÆᵯO®ḄᵯᵯÇ⊤2ÆȦᵯÄḄᵯÇ᪷U=/RãäÉᵯÇ⊤Êᦪm0.448ᵯO®Ḅᵯ᪷ÀὶᵯÄᵯ<ÖãäÎÏᘤO®ḄᵯáGâãäÎÏᘤḄᵯ±᳛(4)Ð8¾ᔠSஹSiஹSz¬jᵯÑὶÒ©ÎÏᘤÀὶÂᐭᵯÄᵯ⊤ÆÑὶHᑖᵯÄḄᵯÉᵯ⊤ḄÊᦪm21/8᪷åæȦ¬jᵯḄᵯÇᜧ᪷ÔÕÖåæ¬jᵯḄᜧ᪷ÑὶᵯÄᵯ<Öã

19ä¬jᵯ*8ÑὶÒḄᵯ᪷P=U/ãä¬jᵯ*8ᵯÄḄᵯ±᳛áGâᵯÄḄÙ▭ᵯ±᳛Ḅᜧ஺t⚪ὃwÀὶᵯÄᱯஹÑὶᵯÄᱯஹÔÕÖஹᵯ±᳛ÛÜḄᮣéêᵨ⚪ëᨵíî஺11.ூᫀ௃êÏ5x106/Vூ᪆௃UᙠÄLòóḄôõ©ÄöḄ᪛ÍøḄùú¹ûxᓄᡠ--õümý᯿ᱥÄöḄ᪛êÏḄÿp=l()spa,S=50m2,ᵫp=gᜧ⚔ḄF=pS=105Pax50m2=5X106/Voᦑ#ᫀ%&'(5x106/Vo(1)Ẇ*+Ḅ&',-./᪵Ḅ123456᯿ᱥḄ9:;.ᔲ=ᓄ1᝞@=ᓄ1ᱥA.&'Ḅ1᝞@B=ᓄ1ᑣ.☟EḄ((2)⍝ᜧGHI☢K1LᑭᵨGḄOP=QR=pSTUᜧVᵨᙠX⚔⊤☢ZḄ஺\⚪^⌕ὃabc&'5☟EஹGOPḄᳮfHgᵨ1hiTUjkᜧXᨵ஺12.ூ#ᫀ௃pqᜧrstூf᪆௃fvwxHyzḄ{|1xḄ{|Ḅ}ᜧ1ᢣxḄ{|pqᜧ1yzḄ{|}1ᡠyzḄ{|rst஺ᦑ#ᫀ%pqᜧ(rst஺(1)rsᢣ|rḄt1ḄஹᾪḄ|rrst஺(2)pqᢣ|rḄᜧ஺(3)r⁐ᢣ|rḄ஺⚪^⌕ὃabcpqஹrsஹr⁐Ḅᳮf1.|b1⌕b஺13.ூ#ᫀ௃802020⚓1ᐳ36⚓

20ூf᪆௃f(1)ᵫL1¡¢᣸¢¤ᐵ¦1§¨ᔣZ&'1ª\«¬.¬((2)ᑁ¯°ᡂ1²³V´µ1°ᡂ¶²¬1·¸¹2¹1᜜»¼1½12400r/min=40r/s,ᓽÃÄ°ᡂ20²³V´µ1°ᡂ80²¬1᜜»¼20½஺ᦑ#ᫀ%(80(20஺(1)ᨵᔾஹஹ»¼ஹ᣸¶²¬1᪷Ç¡¢H᣸¢ḄÈᐵ,-H§¨Ḅ&'Éᔣᩭᑨ̬ḄÍÎ((2)ᑁ¯°ᡂ1²³V´µ1¶²¬1·¸¹2¹1᜜»¼1½஺fÏ\⚪⌕Ðᔠᑁ¯Ḅ¶²¬³Vᱯ¡Óᑖ᪆f#1ÕÖ9ᐵḄᦪÇᜧ1Ø᪷ǹ١Ó9ᐵTU஺14.ூ#ᫀ௃Úᜧ(☠Üூf᪆௃f(1)ÝÞßᯖá%10cm,ãäᯚÚᙠáæÝÞß18cmᜐ1ᱥá2/>u>f,\èᡂ᎔êÚᜧḄëì((2)ãíîïßᱏÚᙠ∑äHÝÞßòó1ôiÝÞßḄᐝöØv÷ᩭøùØúᡂì1ᡠãᐝû☠ÜÝÞß1üýᙠᐝûZþᑮᨎḄ஺ᦑᫀᜧ☠஺(1)2/>u>/,ᡂ᎔ஹᜧḄ(2)ᱏ!"#$ᐝ&ᐹᨵ)*+ᵨ#)-./0ᡂ஺1⚪34!"ᡂḄ5#⌕789:ᡂᱯ<=ᱥ?ஹ?@AḄᐵCDᐸFᵨ஺15.ூᫀ௃1801.5ூN᪆௃NPὑḄᵯST=Pt=3Wx60s=180/ᵯ]^&ᙌḄᵯ`/=5=a=0.5/1UOKᵯ]^de&ᙌḄᵯ`fgḄhiQ=l2Rt=(0.54)2xo.iox60s=1.5/஺ᦑᫀ1801.5஺1ஹno“6P31V”Ḅstuvwᡧ#ᵯyz&ᙌ{|0.1}✌ᐜ#⌕vwᡧḄᡠPὑḄᵯS”nᑖᓄzS#nᑖᓄᑁSQ.ᡠ#fgḄhiQீPὑḄᵯSW.ᓟ⌕fgḄhiPὑḄᵯS#ᓽ$wᡧஹஹᵯyz@

21Ḅᵨᵯᘤ#ᐸᵯh2ஹN⚪e^◤⌕ᡠᨵᱥᳮiḄᓫ⌕ᵨᑮ▭ᓫ#ᡠᐜ⌕¢lminᓄᡂ60sᩭ§¨©ª஺3ஹde“6V3W”«᪷®¯/=5«°±஺4ஹ©ªPὑᵯSḄ®ᓝ=Pt©ªᵯhḄ®¯Q=/2³஺´⚪ὃ¶·g$¸¹ᵯ{ᵯ]ḄᵯS©ª=ᵯh©ª஺16.ூᫀ௃3450ூN᪆௃N(1)ᵫᙶ᪗½«¾¿ÀÁÂi15kgᱥÅÆ#ÇᵨÀÁᱥÅḄÈ᳛(ÊË)ᨬᜧ#ᐸ|50W30ᣊÎÏᒹ#ÑÂi150kg,ÒᣊÎÏḄÂi5kg,ᵫÀÁÎÏᡠ◤⌕ÓḄÑÈnÔḄ#ÕÖ«S×ᙢÙÚᢇÎÏÀÜÝÞ#⌕°ÇßàᙠᨬᜧÈ᳛(ÊË)â᝱äå+#æ1ÒçFÀÁÂi15kgḄÎÏ#ᓽèÒçFÀ3ᣊ஺(2)ÒçÀÁḄÎÏḄéêG=mg=15kgx10N/kg=150NéêÓḄÈW=Gh=1507VX10m=1500/ᵫP=?±#ÒçÜïᡠᵨḄÆA"ñ=ò=30s,ÒçäïᡠᵨḄÆAt'=3=x30s=15s,ᑣnõᩭö◤⌕ḄÆA÷=t+t'=30s+15s=45s,Ñᐳᨵ30ᣊÎÏ#1çÀ3ᣊ#ᡠ#⌕úᡂÀÁûü◤⌕10õᩭö#ᑣèᨬ×úᡂÀÁûüýþöÿᙢᡠᵨḄt4=10J=10x45s=450s஺ᦑᫀ3450஺(1)⚔!Ḅ"#$᳛ᨬᜧᵫ)$*+᪷-p=70#1234567Ḅᨬ8(2)᪷-G=mg=#>?67Ḅ@AḄBCᑭᵨE=G/i=>?67H$I⍝ᨬᜧ"#$᪷᳛-t=?M=>?NOP=#5OQR0#Sᡂ67UVWXYZᙢᡠᵨḄ஺[22⚓ᐳ36⚓

22^⚪ὃabcd$Ḅefghi$᳛Ḅefgjkilᵨm=nopᱥr6ᑮON◤⌕ḄvP-myNz#ᨬᜧ$᳛iᨬᜧ$᳛5Ḅ67{|}~^⚪Ḅᐵᨵ*+Ḅ஺17.ூᫀ௃10.25ூ᪆௃ᵫᵯMᔠᐵSὶᵯ⊤5Ḅᵯᵯ⊤ᵯḄᵯᵫ="M0Ḅ+ᵯᑖA=¢=9=0.254,/2=¥=9=஺-54,¦ὶᵯᔜᜐḄᵯ©ª«ᵯ*¬®¯°ᐝᡠ²ᵫ/1Ûὑ1/cW•Þᵯᵯ⊤Ḅßàß3000ßᑣᵯ⊤Ḅßàßm1500ßᵨᵯᘤÛὑḄᵯE=áâã=•Äµᵯ⊤¶ᦪ367.2AW-h+0.5kW-h=367.7kE•/iᵨᵯᘤḄᵯ$᳛P=^=^^=lkW=1000W60஻

23ᦑᫀ367.71000஺ᵯ⊤ḄzᦪᦪÍÎ᪾ᨬÐ*Ñ~ÄᦪᓫÑ~kW-,ᵯ⊤ZᩭḄzᦪåNᵨᵯᘤÛὑḄᵯᓽÐᩭᵯ⊤Ḅ¶ᦪ3000r/(k஻ç)⊤¶ᵯᵨᵯᘤ>Ûὑ1kÄᵯᵯ⊤Ḅßàß3000ß-µM=ᵯ⊤Ḅßàßm1500ßᵨᵯᘤÛὑḄᵯᑭᵨP=?ef#ᵨᵯᘤḄᵯ$᳛஺^⚪ὃaᵯ⊤Ḅzᦪஹ+èᵯ⊤éᦪḄᳮஹÛὑᵯḄefஹᵯ$᳛Ḅef⍝3000r/(kW-/i)⊤¶ᵯᵨᵯᘤ>ÛὑMW,ᵯᵯ⊤Ḅßàß3000ß~⚪Ḅᐵ஺19.ூᫀ௃ëìíᵯîíூ᪆௃ூᑖ᪆௃ïð᎔ðòó~ᑭᵨëìíḄYì+ÑZᳮᑴõḄïðö÷~ᑭᵨᵯîíø⌴úûḄ஺⍝ëìíiᵯîíḄlᵨ~ü⚪Ḅᐵ஺ூ௃-ý^Mïð᎔ðòó~ᑭᵨëìíḄYì+ÑZᳮᑴõḄïðö÷~ᑭᵨᵯîíø⌴úûḄ஺ᦑᫀëìíᵯîí஺20.ூᫀ௃þÿ⊝
1500w75%ூ᪆௃(1)᪷ᱥᙠ01sᑁᱥḄᡠ᝱ᙠᦋᵫ!"#ᱥ
$Ḅ%&⊝
'ᵨ)(2)ᵫ*1s2sᑁ+
,=SOON,ᵫᱥ.ᓣḄ0"2=L0m/s,ᵫn=3,345ᵫ67Ḅ0v="Vᱥ=3x1.0m/s=3.0m/s,ᑣ+
FḄ9᳛P=/=?=Fu=SOONx3.0m/s=1500W);ᙠ1s2sᑁ<=>Ḅ?@ᦔ᳛B80%,ᵫ*C!D+
,=500N,ᵫFG=H=I=2ᱥḄJ
G=K,•஻=3xSOONX80%=1200N,N24⚓ᐳ36⚓

24QBRS3JT᥅VD,=)(G+G)ᡠ<=ḄJ
:6=K,YG=3xSOON-1200/V=300/V,QBRS3JT᥅VᡠZJᱥAḄJ
[\B900ND<=>Ḅ?@ᦔ᳛,\ᨵ'\ᨵ,900N.GfhGnno/7C0/TI=----=--------------=-----------=--------=--------------x100%=75%1w,,fW/+WB᜜Grh+GhG
+G,jj900N+300NO(
ljᦑbᫀB(1)%&⊝
;(2)1500W)75%o(1)ᱥᡠ$
B%&⊝
ᱥ)(2)ᵫri=3,345ᵫ67Ḅ0"=e"ᱥᑭᵨP=?=?=Fog1s2sᑁ+
FḄ9᳛ᑭᵨ"=ᔠ=,=igᱥḄJ
ᑭᵨRS3JT᥅VD,=jWᙠWkrhᐸG+G)g<=ḄJ
)oᑭᵨRS3JT᥅VD஻=p=q%=qᓽ=GtgᱥJB900NDḄ?@ᦔ᳛஺!⚪ὃxyz{|<=>Ḅ9ஹ9᳛ஹ?@ᦔ᳛~<=J
ḄgḄᳮT,ὃḄJT஺21.ூbᫀ௃ᵫ⚪S'SᡠᡂḄ᪷ᐝḄᐝᢚᔣRᦋSS'ḄᐝḄBḄᐝᐝ'#ᚖᐝḄ)S#Ḅᐝᢚ¡¢ᐸS'஺᪷&£|ᐝḄᐝᢚZᯖ'¥S#¦&£|ᐝḄᐝᢚ§ᐸS',ᢚᐝᐝḄBḄᯖo'#¨Y©ᯖ஺᝞ᡠ«ூ᪆௃⌕!⚪◤⌕Ḅ¯ᩩᱯ²ᐝজ´ᯖḄᐝᢚZ&£|ᐝ)ঝ&£|ᐝḄᐝᢚZᯖ)ঞᐝḄᐝᢚᔣRᦋ஺ᡂDS#Ḅᐝᢚ¢·|YᓽBSḄS')¸©ᯖᑮᐝº»¼½஺!'஺

25¾⚪⌕ὃxᡂᐝ¿Ḅ'ÀÁÂᵨḄ¯ᩩᱯ²ᐝᐵÄ஺22.ூbᫀ௃ᵫᩨᩚ&⊝ᩩÈ,1Ê=,2%ᙠË
ÌË
ÍḄÎÏYÐD
ÍÑÒ
Ñ\.ᵫᩨᩚḄÓᙠ஺
'ᵨᙠ4D04B
ÍBᨬÒ
Í!DFiᨬ\ᔣᔣÙᵫ!'#FiḄ«Ú)ᱥ{ᩨᩚB6ḄÜᔣÙḄ+
BË
!Ý#Ë
o¥஺'Ë
'ᵨḄᚖᓽBË
Í"᝞ᡠ«ூ᪆௃
Íᢣ¥Óᑮ
Ḅ'ᵨḄº»)ᵫᩨᩚḄ&⊝ᩩÈᙠË
ÌË
ÍḄÎÏYÐD
ÍÑÒ
Ñ\஺¾⚪ὃx
ÍTᩨᩚ.ᨬ\
Ḅ';
Ḅ'ᵨDÓᑮ
Ḅ'ᵨߺ»Bᨬᜧ
Í)áâÐ
Ḅ'ᵨDÓᑮᩨᩚ.ᨬãߺ»B
ÍBᨬᜧ
Í஺23.ூbᫀ௃ᵫ|⌕gåᔠæᐵçèé
S«ᦪᜧᡠ´ᵯìí.6îzḄïð{ᩩñïòîzᔾô
᪷ï᩽ßḄ¼ö'ᵨ÷ø´ᵯìí.6§S᩽᪷úûÐᑣᵯü§¥Ù6üᐭ<ËᘤḄ<ᱏᑮᨬᦪᨬᜧᵯḄᵯᨬᵯᨬᜧᘤ!"ᐵ$%&!ᵯ'(᩽$%᝞+ᡠ-ூ/᪆௃214᪷6Ḅᦪᜧ78-9ᵯ:;<=Ḅ>?@AᩩC>D<=ᔾF᪷6>᩽GḄ$HIᵨKL78-9ᵯ:;@MS᩽᪷6OPQ26⚓ᐳ36⚓

26UᑣWXᵯḄYᔣᯠ\%ᵯ+](2)ᘤḄᱏᑮᨬᦪᨬᜧᵯḄᵯᨬᵯᨬᜧᵫ`%ᵯ+஺/b⚪Ḅᐵdᢕfghᵯ>D>ឋjkḄlmn᪷6oᵨOPUᑣᑨq9ᵯ:;Ḅ᩽ឋḄYr஺24.ூtᫀ௃ᜩwx⊤20z{|2.1x103J/(kg■࠷)ூ/᪆௃/-(1)᪷6~ᔾḄYr⌕ᑴᱥḄ$ᦑ@⌱$zḄ|ᵨ◤⌕ḄᐹMᜩw]᪷6ᣚrᵨ$Ḅᘤ9GḄᩭ~ᔾ¡◀ᜩw᜜ᵫ⊤ᦪ6¤◤⌕Ḅᐹ¥x⊤](3)¦§ᑖ§©¥1tᐸᦪ¥20«](4)ᵨ$ḄᘤG$ᱥᔾᦈḄ$ᡠ10ᑖ®|ᔾᦈḄz{ᵨᔾᦈḄ](5)᪷6⊤¯Ḅᦪ678|ᵨḄ$$GᔾᦈḄ$|ᓣ¦᠒ᦑ|Ḅᔾ²j]ᵫ⊤¯ᦪ6810m),|Ḅ¦§ᓣ³30´-5࠷=25࠷,ᵨᓣ³Ḅ¦§¥55࠷-5࠷=50࠷,᪷6c==78ᙠᔾ$Ḅ¸¹&ᓣ³Ḅ¦§!~ºᡂ¼~ᦑᵨmAtḄ~º¥-c=¾X4.2X103J/(kg࠷)=2.1x103J/(kg-࠷)oᦑtᫀ¥-(1)ᜩw;x⊤](3)20](4)z{](5)|;2.1x103J/(kg■࠷)o(1)(4)(5)ᡃÁÂᵨ$Ḅᘤ9GḄᩭ~ᔾ¡ÃÄYrÅᣚr]~ᱥᔾḄ2ÄYr-Â$Ḅᱥᓣ³$Ḅ¦§~ᔾᦈḄ(ᓽ~G)ᔾᦈḄᔾj]Â$Ḅᱥᔾᦈ$Ḅ(ᓽ$ḄG)~¦§Ḅᓄ¦§ᓄḄᔾj]᪷6஺=É78ᙠᔾ$Ḅ¸¹&ᓣ³Ḅ¦§!~ºᡂ¼~6`ÊXᵨḄ~º:

27(2)᪷6¦§ᑖ§©Íᦪ஺b⚪~ᱥḄᔾὃÏᑴrஹᣚrḄ@ᵨ~ᔾḄYr,¥ḄÒ⌕஺25.ூtᫀ௃ᨬᨬÔ10.0∑×ᐝÙGÚÛுÝᜧᢗgßூ/᪆௃/-(1)àáâw{ãäåæᐝçḄᐝèãäå\ᙠᐝÙCᡂéáêᨬஹᨬÔḄᐝᦿÃìMãäåḄᯖìᵫ+ᵬ78-ᯖìᑮᐝïḄÚÛM25.0cm-15.0cm=lO.Oczn,ᡠãäåḄᯖÚM10.0cm஺(2)᪷6ãäåᡂöᱥ÷öøGḄᨬÚÛ¥4/,78ûa=2/,ᙠýþäåḄ¸¹&ûᱥÚu=2f,ᡂ᎔ஹᜧḄ"=2/,ᐝḄᔠu=2/2f>u>/■ᡂ᎔ஹᜧḄ஺>2f,#᪵ᐝḄ%ᔠD>2/'()ᙠᐝ+ᡂ,ᨎḄ஺⌕/ᙠᐝ+0ᑮ02ᐝ3456'⌼ᡂ()ᙠᐝ+ᡂ,ᨎḄḄ8'9∑;<ᐝ=>4?@஺(3)ᵫEFGHᱥ>@J>ᵫK56ᡂLMGHGᙠBᜐḄᐝ+ᡂP,ᨎḄᡠᡂR᎔ஹᜧḄK56S∑;ᔣUVWᱥ>Xᜧ>Y@ᐝᔣUVWZ)[ᑮ,ᨎḄ஺ᱥ>J2/,>%R2f,ᱥ\>ᨬ@஺ᵫ4ᜐᔣUVWᵫJᱥ_ᔣ2/ᜐ☠aᡠbᱥ\>ᙠY@'Rᱥ_ᔣUVW%ᔣUVWᡠbᱥ_VWḄ>4s@JVWḄ>4s'Ḅᱥ>ᙠPeᯖ>\=ᡂ᎔ஹᜧḄᐸiᵨ9ᢗlm஺ᦑoᫀRq(1)ᨬ@ᨬs10.0(2)∑;<ᐝ=>4?@(3)U>ᜧᢗlm஺(1)vwJxᐝyḄᐝz{K56ᢚ}~ᙠxᐝy+P9K56Ḅᯖ஺ᯖᑮᐝḄ>49K56Ḅᯖ>஺(2)᪷K56ᡂLM><ᱥ>Ḅᐵ஻=2/,ᡂ᎔ஹᜧḄv=2/(3)᪷K56ᡂLM><ᱥ>ḄᐵGḄឋK56ᡂᱥ>Xᜧ>Y@K56ᡂᱥ>J2>%R2/,ᱥ\>ᨬ@஺ᵫ4ᜐᔣUVWᵫJᱥ_ᔣ2/ᜐ☠aᡠbᱥ\>ᙠY@ᵫG0s'sḄᐵ᪷ᱥ>>Ḅᜧ@ᐵᑨḄឋᐸiᵨ஺⚪x⌕K56ᡂḄLMP⌕ᱥ_ஹஹᱥ>ஹ>\=Ḅᜧ@ᐵ28⚓ᐳ36⚓

28ᑮP஺26.ூoᫀ௃ᨵ⁐1400G)9¦§¨⌼ᡂḄ>©ª>ூ«᪆௃«q(1)U®¯¦ᨵ⁐°±᧕³´µ☢Ḅ·ª¸஺(2)U®¯µ_☟ºU®¯»¼½¾¿ḄÀÁÂU®¯¾¿ÃᑮḄµ_ÀÁqP=PAgh=1.0X103kg/m3xION/kgx0.14m=1400Pa஺(3)µ_ÀÁɵ_©ª<ʪᨵᐵᙠµ_©ª<ʪSU®¯»¼µ☢Ḅ·ª¸⌲ÌY@G)9¦§¨⌼ᡂḄ஺(4)µ_ᑁ¿ÊḄ8ஹCаḄ©ªᜧJ°Ḅ©ª᪷p=pgÓ0аÔÕḄÀÁᜧᡠbU®¯»¼µ☢Ḅ·ª¸ᜧᡠbÓc>hB஺µ_ḄʪÂ#Gbµ_ÀÁɵ_©ªḄᐵ஺(5)᝞E3,ÚÛÜᔣUKÝÞß¼µ_ÔÕḄÀÁᜧJU¼µ_ÔÕḄÀÁᵫJÚÛÜᡠᙠ߼ʪ@᪷p=pgÓ0ß¼µ_©ªᜧᦑPa>Pc஺ᦑoᫀRq(1)ᨵ⁐(2)1400(3)G)9¦§¨⌼ᡂḄ(4)>©ª(5)>஺(1)U®¯¦ᨵ⁐µ_±᧕³´஺(2)U®¯µ_☟ºU®¯»¼½¾¿ḄÀÁÂ᪷µ_ÀÁàáâwãä஺(3)ᐸåᩩçSG)9¦§¨⌼ᡂḄ஺(4)µ_ÀÁɵ_©ª<ʪᨵᐵU®¯µ☢·ª¸èᜧµ_ÀÁãÚÛÜÃᑮḄÀÁèᜧ஺(5)᪷ÚÛÜḄéKêëᑨ컼ÀÁᜧ@᪷µ_ÀÁàáᑨìµ_©ªᜧ@஺í⚪îµ_ÀÁᜧ@Ḅlï'ðஹµ_ÀÁãஹµ_ÀÁãäñᔠឋòÁ஺27.ூoᫀ௃ôõö3DÂ#ூ«᪆௃«q(1)ᙠ÷⌕øùúûüḄýþ◤
ᔣᒴᙠᦪ஺(2)᪷ᓣᱥᡠ!Ḅ#$%&'(#&')Ḅ*+ᦔ᳛(./(3)1ᶍ3#4᥅6ᓣᱥ#ᡠ7Ḅ89ᨵᵨ8ᓣᱥ4&'#ᡠ7Ḅ

2989=8ᡠ>&')Ḅ*+ᦔ᳛"=◤=$=ងᵫG=1N,4=75%,ᑣ75%=FG+1/VGHIG=3N/(4)JKLMNOP&'Q9MᦋSᵨḄTᔣᦑ⌱஺/(5)JK%WᑖYZᵨ&'#$%Ḅᵬஹ]&')ᓣ$%Ḅ#ᱥ^1ᶍ3#_᥅6ᑣ`a&'#7Ḅ89b᜜8b᜜8$%7Ḅᨵᵨ8$%de=8$%ᵫ஻=£^xlOO%ᑣᵬஹ]&')Ḅ*+ᦔ᳛$%஺ᦑgᫀ9I(1)/(2)./(3)3/(4)஺/(5)$%஺(1)ᙠijk⌕mno3p◤
ᔣᒴ஺(2)᪷qHr*+ᦔ᳛s&'#ḄᐵuᯠwHr$xḄyz/(3)1ᶍ3#4᥅6ᓣᱥ#ᡠ7Ḅ89ᨵᵨ8ᓣᱥ4&'#ᡠ7Ḅ89=8᪷஻={ஹ100%⊤}r&')Ḅ*+ᦔ᳛ᯠwyᔠ4ḄᦪrᓣᱥḄ#/(4)P&'ᦋSᵨḄTᔣ/(5)^1ᶍ3#_᥅6ᑣ`a&'#7Ḅ89b᜜8ḄNᩭ7Ḅᨵᵨ8$%de=8$%ᵫ=ஹ100%ᑖ᪆஺⚪&')Ḅ*+ᦔ᳛஻s&'#GḄᐵuὃij⚗ஹ3ᵫpsᱥᓣḄᐵuஹᦪᑖ᪆ஹ*+ᦔ᳛Ḅஹ&')Ḅnᨵᵨ84=8Qᐵ஺28.ூgᫀ௃£¤¥282.8x103¦ᐭ¨©k᪗«e¬☢®¯°±•P¬SூG᪆௃GI(1)³ᜩµ¦ᙠ¬µij¶w·ᩭ³¸ṹḄº»¼᪗½Ḅ£¤¥¾¿ÀÁ⁚µ⊝ÄÅZᜩµµ⊝/(2)ᵫᵬÆḄÇom=20g+5g+3g=28g/(3)oÈk¬ḄÉ940mL=40cm3,ᵫÆ4¬Ḅ=É950mL=50cm3,ÆḄÉV=50cm3-40cm3=10cm3,ÆḄÊp=£=Ë%=2.8g/cm3-2.8x103kg/m3BÍ30⚓ᐳ36⚓

30(4)ঞÒÓHÆḄÇoÔÕ◤⌕HÆḄÉᦑ¦ᐭ¨©k᪗«e¬☢®¯³ÆÖrw׬Ø᪗«ᜐ/ট×ᐭ¬ḄÇoJ¬=m-m,×ᐭ¬ÉÛÆÉ7=I/ß=£=áÓ32_ã__nilÆḄÊp=è=ᓛᓛ=ê,P¬^eijk³ÆírwîMNïᑖ¬wᩭð׬ᑮ᪗«ᜐ᣸ó¬ḄÇoô9õ3-m,ᦑ÷øù¾ijyúûüýHḄÆÊS஺2ᦑgᫀ9I(1)£¤¥/(2)28(3)2.8X103(4)ঞᐭ᪗☢;টᨬ஺(1)ᜩ"#ᵨ%Ḅ'⁚))*ᜩ"ᑮ",☢-.)*/ṹ.ᑮ᪗1234567ᜐ')'⁚"⊝:;<#ᢣ┐ᢣᙠᑖ6AḄ7ᜐ<2BC'

31ঝᔠSM52,S1<ᵯÉÛMµÉᘤÓὶᐭᵯ«<ᵯ²⊤EᵯÉÛÔ3Ḅᵯ²<µÉᘤḄᱏᢝ<µÉᘤᐭᵯ«ḄᵯÉ<'⁚ᵯÉÛR1ᑮrÝᔠ〉ḄÉP¬ᡡ,ᵯ²⊤Äᦪ¬àঞᢝᵯÉÛḄÉP?@32⚓ᐳ36⚓

32ὶᵯᱯEஹᵯ$᳛&'Ḅᮣ<=ᵨᨬGHIJKLᜧ஺30.ூRᫀ௃UV(1)Z[\G]☟_`aᙢ☢Ḅde=G=mFg=(1200kg+4x50kg)xION/kg=14000/V,Z[\G]☟_`aᙢ☢Ḅqp=g=st=35000Paw(2)Z[\>ᨬᜧ]yz{`,ᡠ}d/=0.08G=0.08X14000/V=1120/V,`]ᜐ⊝᝱ᡠ}ᱫdF᳛=/=1120N,᪷e=?=r=FuᱫdḄ$᳛P=FG=1120/VxHm/s=560001Vw(3)HᧇᡠḄ$ᨬ=F^s=1120/Vx1000m=1.12x106/,ᐰ¡¢£Ḅ¤¥Qᡂ=I=1ᔾ=2.24x106/,ᨬHḄ©¥ª@«=*=®=0-016%.RV(1)Z[\G]☟_`aᙢ☢Ḅq35000Paw(2)Z[\>ᨬᜧ]yz{`ᱫdḄ$᳛56000Ww(3)²³z{"´Ḅᦔ᳛¶50%,ᨬHḄ©¥0.016kg஺ூU᪆௃(1)᪷F=G=·9£Z[\G]☟_`aᙢ☢Ḅd᪷p=¹£Z[\G]☟_`aᙢ☢Ḅqw(2)Z[\>ᨬᜧ]yz{`᪷/=0.08G£ᡠ}d஺`]ᜐ⊝᝱᪷eº=/£ᡠ}ᱫd᪷P=7=7=FuᱫdḄ$᳛w(3)Hᧇ᪷¼=e½£ᡠḄ$Ḅᨬᜧ᪷஺¢=¾£ᐰ¡¢£Ḅ¤¥᪷m=¿£ᨬHḄ©¥஺À⚪ὃ2qஹ$᳛Âᦔ᳛ḄÃᔠឋLq஺31.ூRᫀ௃UV(1)ÅÆᐵÈᑮÊË1`ᵯḄÌᓫᵯwÅÆᐵÈᑮÊË1ஹ2`R1ஹ/?2ÎὶwÏÎὶᵯÐᵯ-ÑHᑖᵯÏᓃஹ&Îὶ`ᵯḄÐᵯᨬ-ᵫP=U/=d`ᵯÖ×ᢱᑣÆᐵÈᑮÊË1`ᵯÚ×ᢱwR

33ᑣ¤`/?2Ḅᵯ$᳛V¹=ÛÛ=400%zR121஺2ÜÖ×ᢱ$᳛500W,ᑣÝḄ$᳛VPi=PJ-P=5001V-4001V=100W,2ᵫp=U/=9RiḄVU2(220V)2c/n?!=—=-----=741840w1Pl1001V(2)ÆᐵÈᑮÊË1`âᨵ£åæᵯÚ×ᢱᓽPè=P௃=100W,ᵫP=?Ú×ᢱåæ10méᡠêὑḄᵯì:WK=PL=100Wx10x60s=6x104/w(3)ᵫp=£ïḄ©¥Vm=pK=1.0x103kg/m3x2x10-37n3=2kg,ïᔾᦈḄ¤¥VQᔾ=cmAt=4.2x103j/(kg.࠷)x2kgx(100࠷-20࠷)=6.72x105J,Ïõ¤¥öᜫᡠ>ᵯ᮸ùêὑḄᵯìVW=Qẚ=6.72x1057,ᵫP=/◤⌕Ḅ¤`ý:W6.72X1057t=—=-------=1344s஺P.,500W0RV(1)&Ḅ¶4840wফÚ×ᢱåæ10méᡠêὑḄᵯì¶6x104/w(3)²õ¤¥öᜫ4ᵨÖ×ᢱ¤>ÿ2L20ᓣᑮ100஺(◤⌕1344s஺ூ᪆௃(1)ᐵᑮ!1"ᵯ$%Ḅ'ᓫᵯ$)ᐵᑮ!1ஹ2"%ஹ/?2-ὶ"᪷0-ὶᵯ$ᵯ1234P=UI=9ᑨ9:;<ᢱ4<ᢱᵯ$)᪷0P=U/=?@:ᵯ1/?2ḄᵯA᳛"CDᔠ<ᢱA᳛@:ᵯ1R1ḄᵯA᳛"CGHI@:R1Ḅ1J)(2)᪷0P=/@:;<ᢱKLlOminᡠSὑḄᵯU)V34⚓"ᐳ36⚓

34(3)᪷0p=£@Ḅ[\"᪷0Q^=cm4t@:ᔾᦈḄ\"cd\eᜫ"SὑḄᵯU4ᔾᦈḄ\gh"᪷0P=?@:◤⌕Ḅ஺i⚪ὃlmᵯA᳛no4ᵯ1-ὶஹᔾnoஹᵯAnoḄpᔠqᵨ"ᑨ9:ᵯs┡ᜐvcwx᝱ᵯ$Ḅz{|o}ᐵ~஺32.ூᫀ௃(1)1ᘤR2{ᐭᵯ$Ḅᵯ1"ᵯ$%Ḅ'ᓫᵯ$,%ḄA᳛ᨬᜧ"ᑣḄᨬᜧA᳛?!1=—==43.2IV)&3on(2)ὶᵯ$ᵯhvᔜᑖᵯ4"ᡠ"&ᵯ61/"ḄᵯU=U-U=36V-6V=30V,12ὶᵯ$ᔜᜐḄᵯ¡gh"ᡠ"ᵯ$Ḅᵯ¡/=¢=%=1R130஺¤ᵯ5m¦ᵯ¡§᦮©ᵯ$ªḄAW=Ult=36VX1AX5X60s=108007)(3)ὶᵯ1hvᔜᑖᵯ14"ᡠ"ᵯ$Ḅᵯ¡=-^~,1R+Rt21ᘤ/?2ḄᵯA᳛Pz01)R2(&+/;2)R2-(R1+RZ)2R?+2R1R2^^F±-2RIRZ+/+4R1RZ(«1³«2)2."RzPRiRz1ᡠ"/?2=&=30஺"1ᘤSὑḄᵯA᳛ᨬᜧ"ᑣP=-=^^-=1O.8W.2±2ᜧ4&4X30஺(1)&ḄᨬᜧA᳛}43.2W)(2)¤ᵯ5min,ᵯ¡§᦮©ᵯ$ªḄA}10800/)(3)1ᘤ/?2U·ᑮḄᨬᜧA᳛}10.8஺

35ூ᪆௃(1)1ᘤ&{ᐭᵯ$Ḅᵯ1"ᵯ$RiḄ'ᓫᵯ$"&ḄA᳛ᨬᜧ"᪷0P=U1=9@:ᐸᨬᜧJ)(2)/?2ᵯ6P"᪷0ὶᵯ$Ḅᵯᱯº@:%Ḅᵯ"᪷0ὶᵯ$Ḅᵯ¡ᱯº4»¼½3@:ᵯ$Ḅᵯ¡"C᪷0W=U/t@:¤ᵯ57nbiᵯ¡§᦮©ᵯ$ªḄA)(3)᪷0ᵯ1Ḅὶ4»¼½3⊤À:ᵯ$Ḅᵯ¡"᪷0P=UI=JR⊤À:1ᘤ&ḄᵯA᳛"᪷0⊤·oÂ:A᳛ᨬᜧ1ᘤ{ᐭᵯ$Ḅᵯ1"ᯠÄ@:1ᘤSὑḄᨬᜧA᳛஺i⚪ὃlmὶᵯ$Ḅᱯº4»¼½3ஹᵯA᳛noḄᮣÆqᵨ"ÇÈḄᑨ91ᘤSὑḄᵯA᳛ᨬᜧ{ᐭᵯ$Ḅᵯ1}ᐵ~஺V36⚓"ᐳ36⚓