2022届迪庆市中考联考物理试题含解析及点睛

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2021-2022
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o.2A2xioc=0.4W,ᦑC┯x.ᦑ⌱C.6ஹDூ᪆௃A.ᓫz{|}Ḅ~ᙠ^'.ᜧL☢Ḅᩭᜧ᥅.ᦑA┯xB.ᓫzᙶOḄOᙠ^'.ᜧ☢ᩭ^ᦑB┯xC.qḄᓫzO᯿ᱥNḄ¡ᓫzn¢"#7£Iᓄ¥HḄ.ᦑC┯xD.¦ᵨ¨ᵨ{©ªṹ{©"%ᵯ¬ᵯ¬|ᓫzḄ7£®¯⌴±®¯ᜐᳮW´ḄᦑDef.7ஹAூ᪆௃Aஹµe¶·Ḅ¸¹O1.4m/s=L4x3.6km/h*5km/h,ᦑAef

11Bஹg+,—〉Ḅjkl25C,ᦑB┯n5CஹoḄpqᜧl50kg,stG=mg=5Okgxl0N/g=5OON,ᦑC┯n5P40WDஹuvwxyz{᳛40W,wxyzḄᵯ~/=—=-Q0.18A,ᦑD┯n.U220Vஹ⚪Tᜧ⚪7d⚪ᐳ21ᑖ8ஹ4.8x100ூ᪆௃⚪ᑖ᪆⌲…᣸Ḅpqm=4800t=4.8xl06kg,flt⌲…ᑮḄtF=111᣸g=4.8xl
6kgxl0N/kg=4.8xl07N,⌲…ᙠᜐ᝱t_st5⌲…ᙠᜐ᝱t_stᡠ*⌲…
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ÊÃḄÀஹÊÃḄ=>ÍÊÃḄÎᦈÐÑÒÓ⁚Õ■É.[¡[জᙠ?᦬ḄᙢÙ³ᙽÛÜᙠÃÄᜐÝÞÊÃ5ঝàáâஹãáäåᐵçᐵèᙠ=>ÅÆÝÞ5ঞᗿᕲdìᨚᵨὡîïAὡᩏᙠÎᦈᜐÝÞÊÃ5ᦑ¡ᫀÃÄ=>ÅÆὡ.Qñ[ò¶óô⚪⌕õᔠÊÃḄ■ÉÕᑖ᪆.11ஹ2.410öᵯ÷⊤Îᙠᵯù220VḄᵯúyz

12ூ᪆௃ÐûâᵯüîýὑḄᵯ÷1574.7kW-h-1572.3kWh=2.4kW-h,ᵯüîᜐÿ
᝱ᵯ᳛P=W/t=2.4kW-h/(10x24)h=0.01kW=10W,⍝ᵯ⊤ᙠᵯ220VḄᵯ஺12ஹᵬூ᪆௃!Ḅᡂ#$!ᳫᨔ'Ḅ()*ᜧ,ᜐᱥ'/0ᩭḄᐝ34*ᨔ'ᢚ067ᡂḄ89:ᙠ;<Ḅ=>⌼ᡂ!.ᵫBC⊤D!ḄEBᵬF!GHᡚJKLMNOF13ஹPூ᪆௃᝞BRSTᐵVWXYZW[\]^_`ḄS'abcYᔣefbEPgh஺14ஹi᯿klmூ᪆௃(1)ᑭᵨpq“sts”4*vwlḄ᤬8ᜮsz{|ṹ(᝞Bᵬ)C;qwl᤬8ᜮktiJKiJKᡂ᎔ஹḄ8F(2)᝞BCᱥᜧ8Cᡂ᎔ஹḄ8᯿klEᑭᵨᳮᑴᡂḄ.iJKḄᔣmb∑⌕ᐝ¡¢£¤t¥¦§ᨎḄ8Cᔣmbᐝ©¡t¢ᡂ8ª«Ḅ8¬©Ḅ8.ூ᪆௃ᳫᡠ¯°±Ḅ>ᔣ²³ᔣe´±Ḅ>ᔣµ¶·ᔣR±ḄᵨZᙳC¹ᙠᳫºᜐ.᝞BᡠD:

13᝞eBᡠDN»ூ᪆௃¼⚪ᑖ᪆$ÀÁᐵVᔠ6äÄÅÆ᪷ÈÉ᩽ËḄkÌᵨÍÎÉ᩽kÌᔾÐᑣÒ3ÓÔS᩽eÔS᩽ᵫÕwÒÖ×ᑣCØᵯÙᵫÕÚÙᐭᦑᵯÝÕÚÞ᩽mÚO᩽FᵫÉ᩽ËḄkÌᵨCÉ┐ḄÔS᩽eÔN᩽᝞BᡠD஺ூὃZ×௃4ᵯÒ3ÓḄ᩽ឋäᵯÙ>ᔣḄᑨæூ᪆௃ᵫ⚪çḄ⌕èéêëOìÃᐝí¥îïEªὶḄÁᐵñòᑴRéêí¥Áᐵᙠó«ÁᐵḄtÔ⌕ᙠW3ᵯB᝞BᡠD.AM9Hôஹõ⚪ö÷ᜧ⚪ᐳ5⚪ᐳ20ᑖù18ஹúᙌÆüýËþÿᜧ3360

14ூ᪆௃(1)ᙠ◤⌕ᵨ⏀Ḅ᜜ᯚᡠᐜᙌḄ(2)ᙠᔣ!᎔ᐭ$%ᵨ&'᪵)*+,-./ᡠ◤Ḅ01(3)1᪗3ᜧ456Ḅ.78100࠷,᪷:ᦪ:)<=0Ḅ.7>98C,ᵫ45@A.7@A)<Ḅ.7BᨵDᑮ100CḄFG>Hᙢ45AJ1᪗3ᜧ45.(4)!ḄLM80.1kg,ᑣOP0QRᑮQR./ḄSTUᓣḄᑁXYᜧᡠᔾᦈḄM8஺=஺"a/=4.2xl(Pj/(kg'C)xO.lkgx(98࠷-90࠷)=3360J1a(5)Ḅ.7>100'C,$⏀Ḅ.7>78࠷,ᡠ%Xᵨ⏀UPcd./efUgᓄḄᱯ7.Ḅ.7JḄ.7ᡠ)ᵨUPcd./efUgᓄḄᱯ719ஹ2.26601X10-42.2X101ூ᪆௃(1)ᵫkᵬ)<⍝nopqPḄMT80-5N,ᑖs80.2N,G=tᦪ82.2N,……32.2Nx3/1u=11,vᦋgᱥ᝱Ḅ᪷ÉFGᑗᱥÊᨵᢝFᩭ᝱%gḄឋL.

1521ஹᵯX⊤ஹÍ⊤ஹÎÏḄᵯÐᐵÑÒᡠᨵᵨᵯᘤÔ6=0ᵯX⊤Ḅtᦪ8Wi,Õ§ᵯÐQRÖW-W×0P08ᡭ./0ÙP0018f2,Ô6=0ᵯX⊤Ḅtᦪ8W2.y=ÚÛ.ூ᪆௃(1)ᵫJ⌕pMÜÝÞᵯÐḄ▭à᳛.ᡠ◤⌕pMâὑḄᵯXäâὑᵯXᡠᵨḄ01ᦑᘤᩞᨵᵯX⊤ஹÍ⊤ஹÎÏḄᵯÐ(2)çèᐜᐵÑÒᡠᨵᵨᵯᘤÔ6=0ᵯX⊤Ḅtᦪ8Õ§ᵯÐQRÖ×0P08“./0ÙP0018dÔ6=0ᵯX⊤Ḅtᦪ8W2.ënWW.-W.(3)ᵫ஺=ì<⍝ÝÞᵯÐḄ▭à᳛>P=tt(t~t\2sh22ஹᱥíîï᎔0ᩈñòSḄó஺ᱥḄôõöᥛ☢Ḅᜧᨵᐵ2ஹ3ஹ46(ᡈ)hSூ᪆௃(1)᪷:úûᡈᦪ:⊤)<⍝ᙊýíîï᎔0òSḄó@þÅ@·᧕᎔ᓽ(2)᯿ᙢ☢Ḅ☢ᥛ☢ᜧᜧḄ!ᥛ☢ᜧ"#!☢ᜧ(3)$%ᜧ&'()ᐵ+Ḅ,-./0ᑴᱥ3ᡠ5Ḅ&6ᜧ7ᢝ☢Ḅᜧ#9ᦋ9&'(ᡠ;⌕ᑖ᪆2,3,4?Ḅ,-ᦪAᓱCDEF/G&ḄEᱥDᙠIJK᪵M;N)&'O((4)PQ4?,-ᡃSTUᱥ3Ḅᥛ☢S7&'Ḅ(ᨵᐵᱥ3Ḅᥛ☢ᜧஹ&'Ḅ(,Shᜧ஺ᓽS7ZḄᜧ[Ḅ!\Ḅ஺ᡠ;ᡃSM;PQ]ᓫ_`(ᡈc)eM;fg_ᵬஹijhSklCḄ஺mஹno⚪(qᜧ⚪ᐳ2⚪ᐳ13ᑖ)23ஹ(1)st&lCutF[ᙢ☢Ḅvw!2xl06pa(2)KFTxyzḄ{᳛!lxl05w(3)KFTxḄᦔ᳛!31.25%ூ᪆௃~⚪ᑖ᪆(1)lCutF[ᙢ☢Ḅv6F=G=(mC+m)g=(4x103kg+4x104kg)x10N/kg=4.4x105N,lC[☢ḄvwP=>^^=2xlO6Pa

16(2)lCḄv=72kni/h=20m/s,TxyzḄ{᳛P=^=>Fv=5xl03Nx20m/s=lxl05W;(3)ᵫp=TḄm=pV=0.8xl03kg/m3x50x103m3=40kg,ᐰᡠzḄQ=mq=40kgx4.0xl07J/kg=1.6xl09JTxḄ{W=Fs=5xl03Nxlxl05m=5xl08J,Txᦔ᳛i]=>100%=^x100%=31.25%.24ஹ(1)2.4X10%(2)0.4m/s(3)1.2X105Nூ᪆௃(1)ᵫ=noᱥ3ᑭᵨG=,஻gnoᐸ&6(2)ᑭᵨᳮnoᱥ3z¡5ᑮḄ£6¤¥¦[ᱥ3Ḅ§6¨©&6ª«£6ᵫ¬⍝n=3,§6¯°x±²s=3h,ᑭᵨn=7³=T-=60%noᱫµ6ᵫ¬i⍝40sᱫµ6Ḅ{ᵫ¶noᱫµ6{{%FsWFs᳛ᑭᵨ᜛=Fvno§6¯°x&ᱥz¡ᒴ¹ᓣḄ¨©§6¯°xᑖ»¼ᑭᵨ7=7W=Fsno§6¯°x±²"s=3h,A¶½ᱥ3ᓣ(Ḅ(ᑭᵨ¾¿½&ᱥz¡ᒴ¹ᓣḄ;(3)ÁÂÃÄO,Åzx6ÂஹÆ6ÂᑭᵨÇÈÉḄÊḄᐵ+½6Âᜧᐵ+⍝ᱥ3zˤ¥¦[ÁÂB¯ḄÌᵨ6ᑭᵨᩨᩚ⊝ᩩѽE[08ÒÓḄ6஺ூÔ௃(1)᪷A⚪Ö⍝×ᡭÙ&ᱥḄ3!V=0.6m\Ú!஻=4.Oxl03kg/m3,rrjᵫp=—⍝ᱥ3Ḅ!᪷=0V=Agto!?0.6m3X2400kÜᦑ×ᡭÙḄ&6!G=mg=Þ00kgxlON/kg=2.4xlO4?(2)ᵫᳮ⍝ᱥ3z¡5ᑮḄ£6!ᰦ'áVâ᣸Ìä/niᵨ1ᗓâLg0.6ATX?610æN3=x¤¥¦[ᱥ3Ḅ§6!&=Gᱥ¼%=2.4X104'N—6X1()3?N=1.8XT஺Nᵫ¬ᵬ⍝஻=3,§6¯°x±²!s=3஻¤¥¦[ᱥ3Ḅ§6{Äᨵᵨ{,

17èéÄ"ë=ì=í=¨=60%,ᡠ;‘ᱫµ6Ḅᜧ!F=ï%=ᥤñ21஺47V5w48x105Jᵫ¬i⍝40sᱫµ6{!W=4.8xlOJ,ᦑᱫµ6{Ḅ{᳛!P=J=i2000Wt40sivFsP120001VᵫP=—=ò=/ô⍝§6¯°xḄ!V=-=—^—=1.2/72/5ttF1x10TV1117mèéÄv=3vᱥᡠ;&ᱥz¡ᒴ¹ᓣḄ!vᱥ=u=gXᓃ4=0.4஻/s
3ᵫ¬⍝ÁÂÃÄO,ö÷Eøùᔣ¹Ḅ6Äx6ᑣx6ÂÄOPzˤ¥¦[B¯Ḅ§6ÄÆ6,üÆ6ÂÄ஺஺ý᝞¬ÿ,ᵫஹḄᔜ᥅ᡠᱥBḄ!ᵨ#$ᵨ=G=2.4x104?:3&"…OQOB=)*+,஺.psAOQB,ᡠ=5tOPOFᵫᩨᩚ1⊝ᩩ45⍝$7F&QᒹᡠE039:;<Ḅ#$=&=5x2.4x104<=1.2x105>0Pூ@A௃C⚪ὃFḄ5G@HIJKLஹMNKLஹONKLஹPQRSTᳮஹVḄKLஹᦔ᳛KLஹᩨᩚḄ1⊝ᩩ4ḄYᵨZNHᜧ\ᔠឋH_`aḄᜐᳮcd#᪷f⚪gᩩ4hᐵjᑡclᯠ᦮ᳮop஺qஹ\ᔠr⚪sCᜧ⚪ᐳ3>⚪ᐳ18ᑖv25ஹ0.02207500mூp᪆௃x⚪ᑖ᪆$ï1yz#ᢣ|20000HzḄz}~z#ᢣ20HzḄz}.ὡdᑮyz~z.ï2ᐜyz‷Aᑮ‷BḄ᪷fMNKLoὅḄ.p$পὡrᑮ20Hzᑮ20000Hz,ᓽ0.02kHzᑮ20kHzḄz}
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