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1.23340m/s4s=vt=2l5(1)(2)6(1)(2)(3)720Hz20000Hz20000Hz20Hz8B91.,2.()1010001001001(1)(2)(3)35420.14.(1)(2)(3)(4)5.6.7..8.9.10.11.(ABCDEFG12.ADABBCCDDGDEEFFG13.14.15.()16.(1)(2)(3)17.18.19.1.2.341.23108m/s3108m/s3456(1)(2)3(4)57(1)(2)891234(1)(u2f)(fv2f)(2)(fu2f)(v2f)(3)uf,6(1).(2)(3)(4)()(5)(6)(7)(8)7891012m10.7531=1000=1031=0.1=10-11=0.01=10-21=0.001=10-31=1061=10-64(1).(2).(3).(4).56(1).(2):(a)(b)c(3)(a)(b)(c)(4):7.8.().9.10.11.tsvm/skm/h1m/s=h12.13.tsv14.vtsvst15.1(m)2:kgt(g)(mg)1=1031=1031=103345(1)(2)(3)(4)6(1)(2)(3)7.mVvmkg/m3(kg/dm3g/cm3)1g/cm3=1000kg/m38=103kg/m39(1)mV(2)m=V(3)mv101123234.5.6.7.8.1509.1AU()1.()12()34()N1567(1)(2)(3)(4)689(1)(2)(3)1011.G=mggg=/g=10/1213141516(1)(2)(3)(4)5123SFppPa1=1/2FS24:(1)SF;(2)FS(3)FS56(1)(2)(3)(4)7ghpkg/m3g=kghm8ghp9101112137601=760=105=1415.12(1)FG(2)FG(3)F=G(1)FG(2)FG(3)F=G345VGFg6(1)F=GF(GF)(2)F=F-F(3)(4)F=G()7(1)(2)(3)1()234512(1)(o)(2)(F1)(3)(F2)(4)L1(5)L23=2211LFLF??1221LLFF4(1)L1L2,F1F2(2)L1L2,F1F2(3)L1=L2,F1=F256,.()7n(n)GnF11FS2(W)(F)(s)=3.SFW?WFs(1=1).45GhFL6100?WW7(P)(t)(W)tWPPWt1=1/1=1000123456=+7.81234567J8Q9c1tmQc1011/()12C=103/()1110313Q=cm(t-t0)=cmtQcmt0tQ=cm(t0-t)=cmt1q1/2mqQQq/m341225100?QQ61.2.3.4.5.6.7.(1)(2)(3)8.9.10.1()2I(A)(mA)(A)1=103=1063+-4003A1(U):2U(V)(KV)(mV)(V)1=103=106=1093+-403V015V5112V220V36V380V1(R)()2(R)()(M)(K)1=1031=10334()(1)502A502AABC212RUII(A)U(V)R()1=1/3IURIUR4,R=U/II=U/RU=IR5R1R2I=I1=I2=U=U1+U2+R=R1+R2+nR=nRI1I2=116R1R2I=I1+I2U=U1=U232111R11RRRnR=n1RI=I1+I2+U1U2=111W2hKw?1=1hKw?=106J34W=UItW(J)U(V)I(A)ts5W=UItWUIt6.W=I2RtW=PtW=UQQ7.P(w)(Kw)8.twpP(w)WtUVIA9WtPWtP10RIp2RUp211U12P13U14PUUPPUUPPU=UP=P41220V100W220100110251516Q=I2Rt[QJI(A)R()ts]17()()W=QQ122203456123NS4567N8910(1112N13(N)141516171819.20.21.22.23.24.25.26.2728123456Am.Ts.fHz.m.7v?fTtsv89x1011121.2345678?100---tsvvtsvstG=mgF=F1+F2[]F=F1-F2[]vm/skm/hsmkmtshGNmkggg=kgg=10N/kgkg/m3g/cm3mkggVm3cm31kg=103g1g/cm3=1103kg/m31m3=106cm31L=1dm31mL=1cm31m==10dm=102cm=103mm1h=60min=3600s1min=60s1m/s=hVmF=GFF=G=mgF=gVF=Gp=SFp=ghp1=p22211SFSF2121SSFFF1L1=F2L21221LLFFF=n1Gs=nhpPaN/m2kg/m3hmg=kgg=10N/kg1cm2=10--4m21mm2=10--6m2SL1L2FNGNFNpPaN/m2FNSm2FNkg/m3Vm3g=kgg=10N/kgFNGNF1NL1mF2NL2mFNGNG=Gnsmhmn[]GNmkgn=1F=Gs=hn=2F=21Gs=2hW=FsP=t=cmtt0Q=mqtQIRUIW=UItQJcJ/(kg)mkgtQJmkgqJ/kgQ=VqWJFNsmPWWJts1W=1J/s1=735W1kW=103W1MW=106WWJWJ1W=Gh[]W=Fs[]W=Pt[]W=Ght2t1t=t2-t1t2t1t=t1-t2IAQCtsIAUVR1sWJUVIAts(1)IUt(2)1=1kWh=106J(3)IURIURW=UItUIRW=I2RtW=UItIU/RW=tQ=WP=W/tP=IUI=I1=I2U=U1+U22121RRUUW=W1+W22121RRWWP=P1+P22121RRPPI=I1+I21221RRIIU=U1=U2W=W1+W21221RRWWP=P1+P21221RRPPPWkWWJkWhtshPWIAUVP=RU2P=I2R