专题分享：
空气密度详解
在一定的和压力下，每立方米空气所具有的质量就是空气密度。空气的密度大小与气温、海拔等因素有关，海拔越高密度越低，我们一般采用的空气密度是指在0摄氏度、标准下，密度为1.29kg/m3。空气温度干空气密度饱和空气密度饱和空气的饱和空气地含湿量饱和空气焓水蒸气分压力tρρbpq.bdbib℃kg/m3kg/m3X102Pag/kg干空气kJ/kg干空气-201.3961.3951.020.63-18.55-191.3941.3931.130.7-17.39-181.3851.3841.250.77-16.2-171.3791.3781.370.85-14.99-161.3741.3731.50.93-13.77-151.3681.3671.651.01-12.6-141.3631.3621.811.11-11.35-131.3581.3571.981.22-10.05-121.3531.3522.171.34-8.75-111.3481.3472.371.46-7.45-101.3421.3412.591.6-6.07-91.3371.3362.831.75-4.73-81.3321.3313.091.91-3.31-71.3271.3253.362.08-1.88-61.3221.323.672.27-0.42-51.3171.31542.471.09-41.3121.314.362.692.68-31.3081.3064.752.944.31-21.3031.3015.163.195.9-11.2981.2955.613.477.6201.2931.296.093.789.4211.2881.2856.564.0711.1421.2841.2817.044.3712.8931.2791.2757.574.714.7441.2751.2718.115.0316.5851.271.2668.75.418.5161.2651.2619.325.7920.5171.2611.2569.996.2122.6181.2561.25110.76.6524.791.2521.24711.467.1326.92101.2481.24212.257.6329.18111.2431.23713.098.1531.52121.2391.23213.998.7534.08131.2351.22814.949.3536.59141.231.22315.959.9739.19151.2261.21817.0110.641.78161.2221.21418.1311.444.8171.2171.20819.3212.147.73181.2131.20420.5912.950.66191.2091.221.9213.854.01201.2051.19523.3114.757.78211.2011.1924.815.661.13221.1971.18526.3716.664.06231.1931.18128.0217.767.83241.1891.17629.7718.872.01251.1851.17131.62075.78261.1811.16633.5321.480.39271.1771.16135.5622.684.57281.1731.15637.712489.18291.1691.15139.9525.694.2301.1651.14642.3227.299.65311.1611.14144.8228.8104.67321.1571.13647.4330.6110.11331.1541.13150.1832.5115.97341.151.12653.0734.4122.25351.1461.12156.136.6128.95361.1421.11659.2638.8135.65371.1391.11162.641.1142.35381.1351.10766.0943.5149.47391.1321.10269.7546157.42401.1281.09773.5848.8165.8411.1241.09177.5951.7174.17421.1211.08681.854.8182.96431.1171.08186.1858192.17441.1141.07690.7961.3202.22451.111.0795.665212.69461.1071.065100.6168.9223.57471.1031.059105.8772.8235.3481.11.054111.3377247.02491.0961.048117.0781.5260501.0931.043123.0486.2273.4551.0761.013156.94114352.11601.060.981198.7152456.36651.0440.946249.38204598.71701.0290.909310.82276795.5751.0140.868384.53821080.198010.823472.285451519.81850.9860.773576.698282281.81900.9730.718699.3114003818.36950.9590.656843.0931208436.41000.9470.5891013——
图为海市蜃楼的成因图，它是空气密度()，导致光传播发生()所致．
折射（或改变）
解：因为不同的空气层有不同的密度，而光在不同的密度的空气中又有着不同的折射率，而路面上暖空气与高空中冷空气之间的密度不同，所以光线在路面上会发生折射现象；远处物体的光经路面上空气传播，发生折射后进入人的眼睛，人由于错觉始终认为光沿直线传播，所以看到比物体实际位置高些的虚像．故答案为：不均匀；折射（或改变）．
测试题精选
关于在欢乐的节日里放飞的气球，下列说法正确的是()
A.气球里面充的是空气
B.气球里面气体的密度比空气密度小
C.气球里面气体的密度比空气密度大
D.气球里面气体的密度与空气密度相等
某气体既能用排水法收集，又能用向上排空气法收集，是由于该气体()
A.易溶于水，比空气密度小
B.难溶于水（或不易溶于水），比空气密度小
C.易溶于水，比空气密度大
D.不易溶于水，密度比空气大
填写单位：一只苹果的质量大约是150()，空气密度1.29()．> 问题详情
20℃时水的重度为γ=9．789kN／m3，动力黏度为μ=1．005×10-3N.s／m2，求其运动黏度v。20℃时空气的重度γ=11
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20℃时水的重度为γ=9．789kN／m3，动力黏度为μ=1．005×10-3N.s／m2，求其运动黏度v。20℃时空气的重度γ=11．82N／m3，运动黏度v=0．150cm2／s，求其动力黏度。请帮忙给出正确答案和分析，谢谢！
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密度表详解
空气温度干空气密度饱和空气密度饱和空气的饱和空气地含湿量饱和空气焓水蒸气分压力tρρbpq.bdbib℃kg/m3kg/m3X102Pag/kg干空气kJ/kg干空气-201.3961.3951.020.63-18.55-191.3941.3931.130.7-17.39-181.3851.3841.250.77-16.2-171.3791.3781.370.85-14.99-161.3741.3731.50.93-13.77-151.3681.3671.651.01-12.6-141.3631.3621.811.11-11.35-131.3581.3571.981.22-10.05-121.3531.3522.171.34-8.75-111.3481.3472.371.46-7.45-101.3421.3412.591.6-6.07-91.3371.3362.831.75-4.73-81.3321.3313.091.91-3.31-71.3271.3253.362.08-1.88-61.3221.323.672.27-0.42-51.3171.31542.471.09-41.3121.314.362.692.68-31.3081.3064.752.944.31-21.3031.3015.163.195.9-11.2981.2955.613.477.6201.2931.296.093.789.4211.2881.2856.564.0711.1421.2841.2817.044.3712.8931.2791.2757.574.714.7441.2751.2718.115.0316.5851.271.2668.75.418.5161.2651.2619.325.7920.5171.2611.2569.996.2122.6181.2561.25110.76.6524.791.2521.24711.467.1326.92101.2481.24212.257.6329.18111.2431.23713.098.1531.52121.2391.23213.998.7534.08131.2351.22814.949.3536.59141.231.22315.959.9739.19151.2261.21817.0110.641.78161.2221.21418.1311.444.8171.2171.20819.3212.147.73181.2131.20420.5912.950.66191.2091.221.9213.854.01201.2051.19523.3114.757.78211.2011.1924.815.661.13221.1971.18526.3716.664.06231.1931.18128.0217.767.83241.1891.17629.7718.872.01251.1851.17131.62075.78261.1811.16633.5321.480.39271.1771.16135.5622.684.57281.1731.15637.712489.18291.1691.15139.9525.694.2301.1651.14642.3227.299.65311.1611.14144.8228.8104.67321.1571.13647.4330.6110.11331.1541.13150.1832.5115.97341.151.12653.0734.4122.25351.1461.12156.136.6128.95361.1421.11659.2638.8135.65371.1391.11162.641.1142.35381.1351.10766.0943.5149.47391.1321.10269.7546157.42401.1281.09773.5848.8165.8411.1241.09177.5951.7174.17421.1211.08681.854.8182.96431.1171.08186.1858192.17441.1141.07690.7961.3202.22451.111.0795.665212.69461.1071.065100.6168.9223.57471.1031.059105.8772.8235.3481.11.054111.3377247.02491.0961.048117.0781.5260501.0931.043123.0486.2273.4551.0761.013156.94114352.11601.060.981198.7152456.36651.0440.946249.38204598.71701.0290.909310.82276795.5751.0140.868384.53821080.198010.823472.285451519.81850.9860.773576.698282281.81900.9730.718699.3114003818.36950.9590.656843.0931208436.41000.9470.5891013——常用的液体密度表(单位：<span style="font-size:12font-family:&#39;Tahoma&#39;,&#39;sans-serif&#39;;color:#3千克/米<span style="font-size:12font-family:&#39;Tahoma&#39;,&#39;sans-serif&#39;;color:#，未注明者为常温下) 名称密度名称密度汽油<span style=";font-family:宋体;color:#. 70氨水<span style=";font-family:宋体;color:#. 93乙醚<span style=";font-family:宋体;color:#. 71海水<span style=";font-family:宋体;color:#. 03石油<span style=";font-family:宋体;color:#. 76牛奶<span style=";font-family:宋体;color:#. 03酒精<span style=";font-family:宋体;color:#. 79醋酸<span style=";font-family:宋体;color:#. 049木精(0℃)<span style=";font-family:宋体;color:#. 80人血<span style=";font-family:宋体;color:#. 054煤油<span style=";font-family:宋体;color:#. 80盐酸(40％)<span style=";font-family:宋体;color:#. 20松节油<span style=";font-family:宋体;color:#. 855无水甘油(0℃)<span style=";font-family:宋体;color:#. 26苯<span style=";font-family:宋体;color:#. 88二硫化碳(0℃)<span style=";font-family:宋体;color:#. 29矿物油(润滑油)<span style=";font-family:宋体;color:#. 9－0. 93蜂蜜<span style=";font-family:宋体;color:#. 40植物油<span style=";font-family:宋体;color:#. 9－0. 93硝酸(91％)<span style=";font-family:宋体;color:#. 50橄榄油<span style=";font-family:宋体;color:#. 92硫酸(87％)<span style=";font-family:宋体;color:#. 80鱼肝油<span style=";font-family:宋体;color:#. 945溴(0℃)<span style=";font-family:宋体;color:#. 12蓖麻油<span style=";font-family:宋体;color:#. 97水银<span style=";font-family:宋体;color:#. 6水(0℃)<span style=";font-family:宋体;color:#. 999867水(20℃)<span style=";font-family:宋体;color:#. 998229水(2℃)<span style=";font-family:宋体;color:#. 999968水(40℃)<span style=";font-family:宋体;color:#. 992244水(4℃)<span style=";font-family:宋体;color:#. 000000水(60℃)<span style=";font-family:宋体;color:#. 983237水(18℃)<span style=";font-family:宋体;color:#. 998621水(100℃)<span style=";font-family:宋体;color:#. 958375&（单位：103千克/米3）氢0. 00009－252. & 80. 0708－2620. 0808氦0. 00018－268. & 90. 126氖0. 00090－245. & 91. 204约1. & 0氮0. 00125－195. & 80. 805－252. & 51. 026氧0. 00143－1831. 14－252. & 51. 426氟0. 001696－1811. 11－2231. 3氩0. 00178－185. & 71. 402－2331. 65臭氧（O3）0. 00214－1831. 71氨0. 00077－34. & 11. 557－102约1. & 9氪0. 00374－153. & 02. 155约2. & 0氙0. 00589－1093. 06－1402. 7氡0. 00973－624. 4约4名称0℃，标准大气压，密度名称0℃，标准大气压，密度名称0℃，标准大气压，密度煤气0. 00060一氧化碳0. 00125氯0. 00321溴0. 00714空气0. 00129氯化氢0. 00164甲烷0. 00078氧化氮0. 00134硫化氢0. 00154乙炔0. 00117乙烷0. 00136二氧化碳0. 00198
()叫密度，密度的主单位是()．
解：单位体积的某种物质的质量叫密度，密度的主单位是kg/m3．故答案为：单位体积的某种物质的质量；kg/m3． &&
密度是比较相同体积的不同物质质量大小的物理量．在国际单位制中，密度的主单位是kg/m3，常用单位是g/cm3．
测试题精选
密度表示在体积相等的情况下，不同物质的()不同，一定体积的水银的质量是同体积水的质量的()倍．
查一下课本上所列的密度表，其中固体密度最大的是_____，液体中密度最大的是_____，气体中密度最小的是_____．(0℃，1个标准大气压下)
人口密度表示人口分布的稠密与稀疏程度。()水力学教程第三版课后答案(黄儒钦)_百度文库
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水力学教程第三版课后答案(黄儒钦)
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