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| 折扣與優(yōu)惠：團購最低可5折優(yōu)惠 - 了解詳情 | 論文格式：Word格式(*.doc) |  |
摘要:物質(zhì)的密度是反映物質(zhì)的一種特性,它與實際應(yīng)用比較緊密，測量物質(zhì)密度就顯得很重要。目前液體密度測量的方法細(xì)分有幾十種，但是，各種方法相互間很少給予比較與分析，導(dǎo)致在實際測量中的方法選取十分困難。 本文選取了常規(guī)法、等體積法、浮力法、W型管法四種液體密度測量方法對鹽溶液密度進行實驗測量。重點陳列了實驗中量筒使用的問題，并提出問題解決的初步設(shè)想。通過比較測量值與標(biāo)準(zhǔn)值，從而對不同的測量方法對測量值產(chǎn)生的影響進行比較，分析其產(chǎn)生的原因。結(jié)合以上比較與分析，歸納出了不同實驗的優(yōu)點及缺點，同時給出了不同情況下實際測量時的方法選擇方案。 對四種方法方法的測量值與標(biāo)準(zhǔn)值進行比較之后發(fā)現(xiàn)：通過常規(guī)法及等體積法測得的鹽溶液密度值較接近標(biāo)準(zhǔn)值，通過浮力法及W型管法測得的鹽溶液密度值產(chǎn)生的偏差較大。 結(jié)合對實驗儀器的分析后發(fā)現(xiàn)：量筒讀數(shù)及液體表面張力是產(chǎn)生誤差的主要原因。針對量筒讀數(shù)問題，提出了雙面刻度的改進方案，同時通過分析得出本實驗中表面張力的影響，使得W型管法的測量值較標(biāo)準(zhǔn)值偏大。 關(guān)鍵詞：鹽溶液；密度；量筒
Abstract:The density is an important character, it’s close to practical application. Currently, there are several decades of methods to measure it.But, few of them have been compared, which caused difficulties to choose. I choosed four methods to measure the density of sault solution, such as the conventional method, the equivalent volume method, the buoyant foce method and the W-tube method. Found and solved the difficultiy in using measuring graduated. By the comparison of measuring value and standard value, discribed the difference between these methods, and analysised the origins. Combination of the above comparison and analysis, extracted the merits and defects of these different methods, and by the way, I gave an advise to how to choose these methods under different conditions. Under the comparison of the gap between measuring value and standard value, I found it'ssmaller which is measured by the conventional method and the equivalent volume nethod, and it’s bigger which is measured by the buoyant foce method and the W-tube method. Combination the analysis of experimental apparatus and found that, the graduated cylinder readings and the interfacial force lead to inacurracy directly. I introduced the double scale volume to make volume work better, and obtained that the value measured by the w-tube method is larger by analysising the effets of interfacial force. Keywords: Sault solution; Density; Graduated cylinder |
