• 2022-06-16
    在[tex=1.643x1.071]KRN39XNzhNKLNW8UykCR8mvj5a3P/xYKFrnIZ1EqNkw=[/tex]和[tex=2.286x1.0]BXyl3jrscB0ti56TOaCXKELkO5N4uYrIUdKLdAtNSK4=[/tex]下,空气的密度为[tex=5.143x1.429]Sd5X1+pVVEvPuuo/P6k6GGsmauvpIdo9Phz0yOHDKAvzkgO/GodDLkKWbZideWq8[/tex] 空气的比定压热容 [tex=15.0x1.5]Wc7vGQbn2EjkwWiNF72N0rYkpMwlQ33VkpYhbbEfifSQWF4WGLiP1mimo/Z+/RrNp99CqAZ3HPKJcVh5e26B9PuwsVGYsH57R8n4ZFn0zaz45Oy5swpwnVJSqTsm4EHWWMGwGcaD4I/VOOiw1QG0mg==[/tex]今有[tex=2.286x1.214]mLh77wdZ8zZ7aZGrJbZKjq/Ke9CW5G7/yRGGGkBm7xc=[/tex]的空气,试计算:[tex=1.357x1.357]TWUgLpDrEXIKICMuiEQPjw==[/tex]若维持体积不变,将空气由 [tex=1.643x1.071]KRN39XNzhNKLNW8UykCR8mvj5a3P/xYKFrnIZ1EqNkw=[/tex]加热至 [tex=2.143x1.071]5EnNnQAH4EmVEukBezotBFR0Fi5MFGaqWMC31mH7Qvg=[/tex] 所需的热量.[tex=1.214x1.357]vzdGmXlbw83hTiK2SebvEA==[/tex] 若维持压强不变,将空气由 [tex=1.643x1.071]KRN39XNzhNKLNW8UykCR8mvj5a3P/xYKFrnIZ1EqNkw=[/tex]加热至[tex=2.143x1.071]5EnNnQAH4EmVEukBezotBFR0Fi5MFGaqWMC31mH7Qvg=[/tex]所需的热量.[tex=1.214x1.357]zs4t7aUJaV7q8Vd+b4EZVA==[/tex]若容器有裂缝,外界压强为[tex=2.286x1.0]6B0O4QOMWRagm33Q5DG9gw==[/tex],使空气由[tex=1.643x1.071]KRN39XNzhNKLNW8UykCR8mvj5a3P/xYKFrnIZ1EqNkw=[/tex] 缓慢地加热至[tex=2.143x1.071]5EnNnQAH4EmVEukBezotBFR0Fi5MFGaqWMC31mH7Qvg=[/tex]所需的热量. 
  • 解[tex=1.357x1.357]Lt8Ly9IQTOKvEnwKD/KDLg==[/tex]由题给空气密度可以算得[tex=2.286x1.214]mLh77wdZ8zZ7aZGrJbZKjq/Ke9CW5G7/yRGGGkBm7xc=[/tex]空气的质量[tex=1.286x1.0]fAfL1gz2FNNAp5ncosS6cA==[/tex]为[tex=11.143x1.214]FcvsEq1Ua9PnrpDr9Cn3UzQqobXtoGzk7HVJW4sfln1SZXn3BCN0XYeWSsriYEippG2AgPa6/Q3AHo6SI0xOCw==[/tex]比定容热容可由所给比定压热容算出:[tex=24.643x2.714]AtuYYtQguAaLU/zlcbKHL7SrgzRu4x2QOa/jrJ4VkNKlVrbuAXzgkhUUvbD7ZQZjwaa7CS2FwKLxgmqq5zCYFnfu++KmIaK9DJRABFo8rnV7R0t8NKqGqSpQjtlHjKnr/yrzqHlkKUBnWgFo3tjtqSdYs14Ee3uDGHGWYpZ1Zu0d5SU9q5WIEoILtQLQw09e5NXqBqZeA7mziSnV0cRDz7Uit0fegsloGm2U3OUFxFKV/glBMo8yytEdGgx5hW5Lkt5diAyVjo1ePeE0Ye9p6w==[/tex]维持体积不变,将空气由[tex=1.643x1.071]KRN39XNzhNKLNW8UykCR8mvj5a3P/xYKFrnIZ1EqNkw=[/tex]加热至[tex=2.143x1.071]5EnNnQAH4EmVEukBezotBFR0Fi5MFGaqWMC31mH7Qvg=[/tex] 所需热量[tex=1.214x1.214]Vfz4Uhtlz/asQqziweRoIQ==[/tex] 为[tex=13.357x4.5]qeiYnKXLEhyhuGRg8yLtr8JapoMLk6YR7+Sz0hEYwtNNCCUe2j4cU2pIEZw84xonGBw2UVEsoSdnUNyoeHo47KOmacPX6XpAfICvb/0j5Cc2s+EZr5aNkpMtB4eQo2G+TAK/ievgWxmKytLE2I2Bi9HmDpWU3s7tEzxeyswn6CYZf/puAruTPifY1mRjRHLjK9gSJYnCWdolLoGB306HzAoV6YnWK1Rh++T9HOjPQfi2FyQNHD1qF6dA/i+DIz5/[/tex][tex=1.071x1.357]vzdGmXlbw83hTiK2SebvEA==[/tex]维持压强不变,将空气由[tex=1.643x1.071]jRr3y1hlwzBwRETRECpAHDLh2u/KZ7+NRfpbe67ZweI=[/tex]加热至 [tex=2.143x1.071]bOLbf2WRBlXz062FCLBa6YyIsVJhmy+jr/gEjjaXTeiCNkOle7SMC8jnrTupkUEP[/tex]所需热量[tex=1.143x1.286]pzQRaZ3iRruCAsMOPxvOUA==[/tex]为 [tex=13.286x4.5]qeiYnKXLEhyhuGRg8yLtr2UUaBD9NFKxnHWcN44lDOyyd4Z0IwwfNMA3RSR8X4J2WQd+FJ6GaDLCD9QxXas7PpVLCpVg8jlTVvbl+domYoePTTPuxWPhJ4W9GHQA950eEtYwkGAgB8NIxCYvzDBXllDpwQiGdm4Jkj3/cGpiqRP6hh/jP+L0hWjx6mi4ClTxPstgUu74ZDXMrQWirVX+HheAnswMCzKIXiUnwCbRVHsaLexaeXAMAtu0Nt3yY1fd[/tex][tex=1.214x1.357]zs4t7aUJaV7q8Vd+b4EZVA==[/tex] 若容器有裂缝,在加热过程中气体将从裂缝漏出,使容器内空气质量发生变化. 根据理想气体的物态方程[tex=4.786x2.143]wexTRr6pJsfHDeDJDB/ZVSb4GTyrv3LXJBvTZza8lPQ=[/tex][tex=1.0x1.0]0KCelhZna0R9EGhYF1VZHA==[/tex]为空气的平均摩尔质量,在压强和体积不变的情形下,容器内气体的质量与温度成反比. 以 [tex=2.643x1.214]PhPUwy3MMv74nHyiCkVSiw==[/tex] 表示气体在初态的质量和温度, [tex=0.929x0.786]VF0GLe2VBE/4VKNzpyOfFg==[/tex] 表示温度为[tex=0.643x1.0]iollMFTzm3iqFEHRyKQe1A==[/tex]时气体的质量,有[tex=4.429x1.214]fC32ExIAs5ICqlQseBoE0ieSJoIw9+vn5nu6Ea/LF58=[/tex]所以在过程[tex=1.286x1.357]H/Y1yDd3FHwuw/2gLDO1ucFD2qJiXA2K7KS76vqILUc=[/tex]中所需的热量[tex=0.857x1.214]to/MrMoO1ux8UhZHnpEvBg==[/tex]为[tex=8.429x8.929]qeiYnKXLEhyhuGRg8yLtr3x9XVCt46wU35UpYME1icSGdxmplBnun95F0xXEvRWKpkQRHxhQE5dNUV90xMD/DDasKQWL9ioEnJKe7IVPFcn5kpxfOKCpl3e0N0NgyfFor6s7I+NywhpA+ldh96HltCXXaRiz0G5LFQprp66WdHeHjUhOBVjbUgvMjrGTVcuHfyOuCeufAOUksiJQxpPcpBN2TxsXAmLwVF5NxmUk/UCYU7Nj3PhVgro2eWwub+xUDmoYNuX/D8O+pqqyLb28Yg==[/tex]式中用比定压热容[tex=0.786x1.071]6DWPyrpgbUpa/fIoN6Skfg==[/tex], 意味着已计及气体从裂缝漏出对外所做的功. 将所给数据 代人,得[tex=17.571x4.071]qeiYnKXLEhyhuGRg8yLtr7GCKJiO63mVOqLtZMTfFydLj4HS/utaslZKmSIUQ6YSUMp3aVFKly03O/VPmtQSil7hf3M12r7Gzb0nFBbyvPaPnPh7MW+mzN8/rWRosZkK+lFYliooovFmyUzycGHCcPQB8o3bb8rgl3hIdVDemWuXZJTFfpzD1GHz73vABtJ8RyJs27kKqKdkchV/ISES8OzRSaQKctqXblCanUNbrjA=[/tex]

    举一反三

    内容

    • 0

      判断下列命题是否为真:(1)[tex=3.643x1.357]/5abqJjwKZ1qr+6hsVFF5EBvfq3ggOFNlHMClz0h9nk=[/tex](2)[tex=2.929x1.357]rGJpyjIjJpbcoBTWxP0Jiw==[/tex](3)[tex=4.5x1.357]2wycHMoqU83MyEp17iBils58bR7YLuCTI2G9NVAdlfY=[/tex](4)[tex=5.214x1.357]CTz2gu+IIm1GgNmYMGaduCRtA41wnW4WqwRWwEhq6aA=[/tex](5)[tex=4.857x1.357]1DcE2BMMOaZhTuxR/mjgsboXxfg5ET59Dp4I/jjEDuw=[/tex](6)[tex=4.643x1.357]BSryrsQYOvTP2hTWRu6t4nAuJwlSs4L9jaq70EpB+Us=[/tex](7)若[tex=6.0x1.357]y0IZLUnBO88nR8WBZYvd7QXv5S1OMINV5cQNzPyiyAc=[/tex],则[tex=3.429x1.357]1brfPwTkVVIX4GfoMIUskA==[/tex](8)若[tex=7.643x1.357]MhLfJXZnhbXiB0x3oNtFzThV4Y1mJxe1VYr7PkJE/T6hmTD3WWp+UxbNwvUQ6DHk[/tex],则[tex=4.143x1.357]LZUA94ISo1po5HWsOVeBCjo0rMvj7uw3bGw5HiZenrI=[/tex]

    • 1

      输出九九乘法表。 1 2 3 4 5 6 7 8 9 --------------------------------------------------------------------- 1*1=1 2*1=2 2*2=4 3*1=3 3*2=6 3*3=9 4*1=4 4*2=8 4*3=12 4*4=16 5*1=5 5*2=10 5*3=15 5*4=20 5*5=25 6*1=6 6*2=12 6*3=18 6*4=24 6*5=30 6*6=36 7*1=7 7*2=14 7*3=21 7*4=28 7*5=35 7*6=42 7*7=49 8*1=8 8*2=16 8*3=24 8*4=32 8*5=40 8*6=48 8*7=56 8*8=64 9*1=9 9*2=18 9*3=27 9*4=36 9*5=45 9*6=54 9*7=63 9*8=72 9*9=81

    • 2

      以下程序的输出结果是() main( ) { int i , x[3][3]={9 , 8 , 7 , 6 , 5 , 4 , 3 , 2 , 1} , *p=&x[1][1] ; for(i=0 ; i<4 ; i+=2) printf("%d " , p[i]) ;

    • 3

      A=[1 2 3 4 5 6 7 8 9]A(5)=[]A=1 4 7 5 8 3 6 9

    • 4

      采用基2时间抽取FFT算法流图计算8点序列的DFT,第一级的数据顺序为 A: x[0],x[2],x[4],x[6],x[1],x[3],x[5],x[7] B: x[0],x[1],x[2],x[3],x[4],x[5],x[6],x[7] C: x[0],x[4],x[2],x[6],x[1],x[5],x[3],x[7] D: x[0],x[2],x[1],x[3],x[4],x[6],x[5],x[7]