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为什么密度计越长越精准

本文章主要介绍了:为什么密度计越长越精准,kem便携式密度计,土工试验颗粒分析密度计法,为什么密度计越长越精准等信息

要判断液面的升降,必须比较冰排开液体的体积与冰熔化成水的体积之间的关系。冰未熔化时,若它漂浮在液面上,则所受的浮力与重力相等,即。冰块所受的,冰块的重力,由此可得;冰熔化后,化成水的体积。所以当冰块漂浮于水中时,,液面不变;当时,,液面上升。若冰块浸没液体中,则冰块排开液体的体积等于冰块的体积,而冰熔化后的体积小于冰的体积,故液面下降。
例2如图所示,烧杯中的冰块漂浮在水中,冰块上部高出杯口,杯中水面恰好与杯口相平,待这些冰全部熔化后()
A.将有水从杯中溢出
B.不会有水从杯中溢出,杯中水面也不会下降
(为什么密度计越长越精准)

适用范围ThisInternationalStandardspecifiesamethodforthelaboratorydetermination,usingaglasshydrometer,ofthedensityat15℃ofcrudepetroleum,liquidpetroleumproducts,andmixturesofpetroleumandnon-petroleumproductsnormallyhandledasliquidsandhavingaReidvapourpressure(RVP)of100kPaorless. ThisInternationalStandardissuitablefordeterminingthedensityofmobiletransparentliquids.Itcanalsobeusedforviscousliquidsbycarryingoutthedeterminationsattemperaturesaboveambientusingasuitableliquidbathfortemperaturecontrol.Itcanalsobeusedforopaqueliquidsbyreadingthehydrometerscalewherethetopofthemeniscusmeetsthestemofthehydrometerandapplyingacorrectionfromtable1(see11.2). Sincehydrometersarecalibratedtoreadcorrectlyatthespecifiedtemperature,scalereadingsmadeatothertemperaturesareonlyhydrometerreadingsandnotvaluesofdensityattheseothertemperatures. NOTES 1Theaccuracyofthedensity,determinedbytheproceduresgiveninthisInternationalStandard,forvolatileand/orwaxycrudeoilscontainingfreeand/orsuspendedwaterandsedimentscanbelessthaninferredfromtheprecisiondataquotedinclause13.Thisisduetothepossiblelossoflightcomponentsduringsamplemixing.However,samplemixingisnecessarytoensurethatthetestportiontransferredtothehydrometercylinderisasrepresentativeaspossibleofthebulksample.Techniquesaregiveninclause7whicharedesignedtominimizesuchlossoflightcomponent. 2Valuesofdensityat15℃canbeconvertedusingstandardmeasurementtablestoequivalentvaluesofAPIgravityorrelativedensitysothatmeasurementsmaybemadeintheunitsoflocalconvenience.
(为什么密度计越长越精准)

黄金纯度与K数对照表
比重范围
1000/1000
19.13~19.51
916/1000
17.45~18.24
834/1000
16.03~17.11
750/1000
14.84~16.12
584/1000
12.91~14.44
417/1000
11.42~13.09
白金密度纯度对照表
比重范围
Pt.1000
1000/1000
21.24~21.66
Pt.950
950/1000
21.24~21.66
Pt.900
900/1000
21.24~21.66
Pt.850
850/1000
21.24~21.66
Pt.800
800/1000
21.24~21.66
Pt.750
750/1000
21.24~21.66
(为什么密度计越长越精准)

本产品的加工定制是是,品牌是博福,型号是电液比重计,类型是液体比重计,适用范围是专门用以测定酸性或碱性蓄电池内之溶液用,尺寸是330(mm)
(为什么密度计越长越精准)

(为什么密度计越长越精准)

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