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1.kgtgmg80mg150g6t2kgm=G/g,,,,,:ABCDE=+FABAB2.mvmvmvkg/m3g/cm3g/cm31g/cm3=103kg/m31kg/m3=10-3g/cm31.0103kg/m311.0103kg:mvmVml=3(cm3)=m/va.ma.V1b.V2d.=m/(V2-V1)=m/va.m1b.Vc.m2d.=m1-m2/Vm=VV=m/mV1.10-10mABr102.1.N1NAB,,,,,2.::3.G=mgg=9.8N/kg1kg9.8N4.5.1.02.3.AB,,,.C:4.05.1F=GGGGF+GGFF-GF2ABBC3p=F/SpPaFNSm2FF=G=mgSPa.Pa50pa.104Pa.104NFFFFF4.5.P01m76cm=p0=76cmHg=1.0105Pa()AB10mCD76cm1.105Pa766.2000,10m,100Pa1mmHgh7.8.(1)(2)F=G=Vg(3)9.FGF=GFGF=G=AB1/323F=GVg=Vg2V==V3CF=G=V=VVVDFGEG,F=G/(G-F)FGa.b.GFGFGFGFFG9.10.(1)tmmVG=mgF=mgG=mg(2)(3)(4)11.(1)(2)()(3):F=GF()F=FFF=G()F=GF=Vg