《水力学课后习题答案第四版(吴持恭)

世界观人人都有，而哲学只有经过系统的学习的人才能掌握它。世界观是自发成的，是不系统的、不自觉的、缺乏严密的逻辑和理论论证，而哲学则是把自发的、零散的、朴素的世界观加以理论化和系统化，因而具有严密的逻辑和完整的理论体系。appearanceoftheweldappearancequalitytechnicalrequirementsoftheprojectmustnothaveamoltenmetalstreamdoesnotmeltthebasemetaltoweld,weldseamandheat-affectedzonesurfacemustnothavecracks,pores,defectssuchascraterandash,surfacesmoothing,weldandbasemetalshouldbeevenlysmoothtransition.Width2-3mmfromtheedgeofweldGroove.Surfacereinforcementshouldbelessthanorequalto1+0.2timestheslopeedgewidth,andshouldnotbegreaterthan4mm.Depthofundercutshouldbelessthanorequalto0.5mm,totallengthoftheweldsonbothsidesundercutnotexceed10%oftheweldlength,andlongcontinuousshouldnotbegreaterthan100mm.Wrongsideshouldbelessthanorat0.2T,andshouldnotbegreaterthan2mm(wallthicknessmmt)incompleteornotallow7.57.5.1installationqualityprocessstandardsoftheelectricalenclosureCabinetsurfaceisclean,neat,nosignificantphenomenonofconvex,closetonature,closethedoor.7.5.2CabinetCabinetfacepaintsnopaint,returnedtorusted,consistentcolor.7.5.3uniformindirectgapfromtoptobottom,slotwidth1.5mm7.5.4adjacentCabinetsurfaceroughnessis0.7.5.5thecabinetsfirmlyfixed,craftsbeautiful.7.5.6Cabinetsurfacegauge,switchcabinetmarkclear,neat,firmpaste.7.5.7Terminalrowofneat,isreliable,theappearanceiscleanandnotdamaged.7.5.8cablesneatandclean,solidbinding,bindingprocessinappearance.7.5.9thefirstcableproductionfirm,craftsbeautiful,clearsignagedoesnotfade.7.5.10fireproofpluggingtight,nocracksandpores.7.67.6.1ofthestandardelectricalwiringqualitytechnologycablea,themulti-corewirebuncharrangementshouldbeparalleltoeachother,horizontalwireharnessorwireshouldbeperpendiculartothelongitudinalmulti-corewirebunch.Thedistancebetweenthewireharnessandwireharnesssymmetry,andascloseaspossible.B-corewiringharnessintoround,multi-corewirebunchusedgwirebinding,fastening水力学课后习题答案0绪论0.1ρ＝816.33kg/m30.2当y=0.25H时Hudydum058.1当y=0.5H时Hudydum84.00.4f=g0.5h的量纲为[L]0.6Ff＝184N0.7K=1.96×108N/m2dp=1.96×105N/m21水静力学1.1Pc=107.4KN/m2h=0.959m1.2PB-PA=0.52KN/m2PAK=5.89KN/m2PBK=5.37KN/m21.3h1=2.86mh2=2.14m内侧测压管内油面与桶底的垂距为5m，外侧测压管内油面与桶底的垂距为4.28m。1.4Pc=27.439KN/m21.5PM=750.68hKN/m21.6P2-p1=218.05N/m21.7=BABrArBA1.8P=29.53KN方向向下垂直底板P＝01.9W=34.3rad/sWmax=48.5rad/s1.10a=LhHg)(21.12当下游无水P=3312.4KN(→)P2=862.4KN(↓)当下游有水P=3136KN(→)P2=950.6KN(↓)1.13T=142.9KN1.14当h3=0时T=131.56KN当h3=h2=1.73m时T＝63.7KN1.150－0转轴距闸底的距离应为1.2m1.16P=4.33KNLD=2.256m(压力中心距水面的距离)1.17P=567.24KN世界观人人都有，而哲学只有经过系统的学习的人才能掌握它。世界观是自发成的，是不系统的、不自觉的、缺乏严密的逻辑和理论论证，而哲学则是把自发的、零散的、朴素的世界观加以理论化和系统化，因而具有严密的逻辑和完整的理论体系。appearanceoftheweldappearancequalitytechnicalrequirementsoftheprojectmustnothaveamoltenmetalstreamdoesnotmeltthebasemetaltoweld,weldseamandheat-affectedzonesurfacemustnothavecracks,pores,defectssuchascraterandash,surfacesmoothing,weldandbasemetalshouldbeevenlysmoothtransition.Width2-3mmfromtheedgeofweldGroove.Surfacereinforcementshouldbelessthanorequalto1+0.2timestheslopeedgewidth,andshouldnotbegreaterthan4mm.Depthofundercutshouldbelessthanorequalto0.5mm,totallengthoftheweldsonbothsidesundercutnotexceed10%oftheweldlength,andlongcontinuousshouldnotbegreaterthan100mm.Wrongsideshouldbelessthanorat0.2T,andshouldnotbegreaterthan2mm(wallthicknessmmt)incompleteornotallow7.57.5.1installationqualityprocessstandardsoftheelectricalenclosureCabinetsurfaceisclean,neat,nosignificantphenomenonofconvex,closetonature,closethedoor.7.5.2CabinetCabinetfacepaintsnopaint,returnedtorusted,consistentcolor.7.5.3uniformindirectgapfromtoptobottom,slotwidth1.5mm7.5.4adjacentCabinetsurfaceroughnessis0.7.5.5thecabinetsfirmlyfixed,craftsbeautiful.7.5.6Cabinetsurfacegauge,switchcabinetmarkclear,neat,firmpaste.7.5.7Terminalrowofneat,isreliable,theappearanceiscleanandnotdamaged.7.5.8cablesneatandclean,solidbinding,bindingprocessinappearance.7.5.9thefirstcableproductionfirm,craftsbeautiful,clearsignagedoesnotfade.7.5.10fireproofpluggingtight,nocracksandpores.7.67.6.1ofthestandardelectricalwiringqualitytechnologycablea,themulti-corewirebuncharrangementshouldbeparalleltoeachother,horizontalwireharnessorwireshouldbeperpendiculartothelongitudinalmulti-corewirebunch.Thedistancebetweenthewireharnessandwireharnesssymmetry,andascloseaspossible.B-corewiringharnessintoround,multi-corewirebunchusedgwirebinding,fastening21.19P＝45.54KN总压力与水平方向夹角＝14º28´1.20P=353KNP=46.18KN方向向下1.21H=3m1.22=1.0cm1.23F=25.87KN(←)2液体运动的流束理论2.1Q=211.95cm3/sV＝7.5cm/s2.2hw=3.16m2.32p=2.35m2.4PK1=63.8KN/m22.5Q=0.00393m3/s2.6Q=0.0611m3/s2.7=0.9852.8Q=0.058m3/s2.9S点相对压强为－4.9N／cm2，绝对压强为4.9N/cm22.10V3=9.9m/sQ=0.396m3/s2.11R=391.715KN(→)2.12R=3.567KN合力与水平方向夹角＝37º8´2.13R=98.35KN(→)2.14R=2988.27KN(→)2.15R=1.017KN(←)2.16R=153.26KN(→)2.17=2342.18F=Rmv22.19Q=g2H2.52.20F=CdL222世界观人人都有，而哲学只有经过系统的学习的人才能掌握它。世界观是自发成的，是不系统的、不自觉的、缺乏严密的逻辑和理论论证，而哲学则是把自发的、零散的、朴素的世界观加以理论化和系统化，因而具有严密的逻辑和完整的理论体系。appearanceoftheweldappearancequalitytechnicalrequirementsoftheprojectmustnothaveamoltenmetalstreamdoesnotmeltthebasemetaltoweld,weldseamandheat-affectedzonesurfacemustnothavecracks,pores,defectssuchascraterandash,surfacesmoothing,wel