2021-2022学年重庆市北碚区中考二模物理试题含解析及点睛

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2021-2022
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,KஹLஹ$2ᡠO/i=)i=±X0.3A=0.1A,P,ὶᵯ12Qᵯ"RSᔜᑖᵯ"DVWᵯXḄᵯYZ[ᡠOᵫ/=?ᵯ33RXḄᵯYu=h(Ki+Ro)=/|(R1+&),ᓽ0.3AX(6C+Ko)=0.1AX(11£1+/?),^:Ko=6£l,0ᵯXḄᵯYU=h(Ri+Ro)=0.3AX(6Q+6Q)=3.6V(3)Sᑖ`)aஹb*+ᵯ1ḄQB᳛DEPi:Pi=UIizUh=h/i=0.3A
0.1A=3
16&(4)S)a*+bᵯIminᵯ"KocdḄeQo="Rof=(0.1A)'X6QX60s=14.4J«11ஹ1.2xl0355ூ᪆௃f⚪ᑖ᪆h1kgḄi᎔ᣵlmnᯠiḄVpqᦋ[stEeu)VpqvᐵᡠOiḄEeuZ[xᯠ1.2x1yJ/(kg
࠷)᪷}Q*cm(t-to):ᔾeiᓣᑮḄt=Qᔾ/cm+to=2.lxlO5J/l.2xlO3J/(kg஺x2kg+30࠷=55࠷.

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14Öஹ×Ø⚪(Úᜧ⚪ᐳ5⚪ᐳ20ᑖ)18ஹabABூ᪆௃(1)ÛÜᘤḄÞ)ÛḄßàáVâaᨵᐵᙠẆäÛÜᘤḄÞ)åæPçᨵᐵᵨᑮḄ×Ø·Ìᑴ[·,èé⌱ëbஹd;Ûì×Ø;ὅḄàáVâaîïᡠOẆäḄðḄñäÞ)ÛḄᐵò.èé⌕ẆäÞ)ÛàáḄᐵòôõÌᑴéöḄVâaîï÷øõᩩùḄaVb;Û஺(2)ᢥûAC;ªEüᢥûAªÛüßᡠOÈḄÞüḄᢥûA,ÈḄÞüýḄᢥûCᢥûBC;ªEüᢥûBªÛüàᡠOÈḄÞüḄᢥûC,ÈḄÞüýḄᢥûB,ᡠOᑖ`ᢥûAªஹBªஹCªþÿᴊ
ḄᨬḄᢥAᨬḄᢥB.19ஹᙠḄᑁᔾᦈḄ!A2.1X103ᵯ#ூ᪆௃(1)$%⌱'()Ḅᵯ#*Ḅ+ḄᙠḄᑁᔾᦈḄ,(2)$%-./Ḅᵯ#*ᙠ0ᑁᔾᦈḄ0!12ᔾᦈḄ1345ᵨ!27⊤9ᔾᦈḄ3:஺(3)ᵫ=>4?@ḄAஹBA!Ḅ(ᔾᦈḄ)AᓣE᠒BᓣEGHIAḄᔾJ⚞L,᪷N=>4?AஹBO!5min,AEPQᓄS3(TC-10࠷=20࠷,BEPQᓄS50࠷-10࠷=40࠷ᵫ஺T=Qs=cmR4UV2!/4=ᑖ஻2/8,4.2'10ᡭ/(kg[C)x20࠷=cx40࠷,c=2.1xl03J/BB(kg*࠷)o(4)\ᙠᵬஹ>./ᵯ#*^ὶ`aḄᵯbc0@Ḅᵯ#*Ḅ#deᑣghi4ᵨᩭklᵯbmnḄoᵯ#Ḅᐵq஺20ஹBrᐵூ᪆௃(1)ᙠklᨵ3tQᓄuvḄw⚪yzᐸ/|tuvnQᓄ}ᢝᐸuveQᑴQAஹkl|ᔠᡂ|tᵨᙠotᐳᵨᙠḄQᵨ0ᦔᦑAeᔠ⚪,BஹklᱥḄᜧoᱥAPḄᐵqᑴᱥḄ@ᵨᑴQᦑBᔠ⚪,CஹẆlᐝ¢£ᵨ“ᐝ”ᩭ⊤9ᐝḄ¦§¨©cᔣᵨ«¬ᦑCeᔠ⚪,

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12V18V-12V1ঝ{**ᐵS2,(ᔠ*ᐵSbSiTᵫ7ὶᵯḄᱯ⍝/=----------ᓽK*—R2জ4%2U18V—U{**ᐵSi,(ᔠ*ᐵS2Tᵫ7ὶᵯḄᱯ⍝/2===Iঝ,”„40Q(18V-t/)ᵫজ@Ri=——'——-«ஹ⚪(ᜧ⚪ᐳ2⚪ᐳ13ᑖ)23ஹ(1)4N(2)0.4X103kg/m3(3)600Paூ᪆௃(1)ᱥᙽA>V=(0.1m)M.OOlm3,322ᑣV=V-V=V-1-V=-V=-xO.OOlm3=4xlO-W,#BᱥAᑮḄFF»=p¡gV᣸=lxl()3kg/m3xl0N/kgx4xl0-4m3=4N(2)£¤ា¦ᜐ¨©ᯠ«᝱T`ᨵ®£¤¯ᱥ`ᨵḄ]ᵨᱥᑮ°b]ᵨ±=G,p¡gV᣸=pmgV,pᱥ=¡=]x1x103kg/m3=0.4xl03kg/m3(3)ᱥᙽA³¦´ᐰ¶`¡L£¤¯AḄ·:

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2
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3
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