作者QKILOLOQ (J-J Thomson)
看板Chemistry
标题平均能量??
时间Sat Feb 24 13:41:24 2007
The fraction of molecules in a one-dimentional gas having kinetic
energies between εx and εx + dεx can be expressed by dNx/N , where
N is the total number of the molecules. What is the expression for
the average energy ___
εx = ?
(A)Σεx,j (dNx,j/N)
Nj
(B)Σεx,j (dNx/N)
Nj
∞
(C)∫ εx dNx/N
0
∞
(D)∫ εx dNx/N dεx
0
x为右下标的意思，请问这一题的答案是哪个选项???
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