問題詳情

4. Which of the followings is the volume-surface means diameter of a mixture of particles?
(A) 


(B)


(C)


(D)

 
xi: mass fraction in a given increment; N: number of particles in a fraction; NT: total particle number;

: average particle diameter in an increment

參考答案

答案：[無官方正解]
難度：計算中-1
書單：沒有書單，新增