Answer the following questions given below:
 
Arun washed a muddy sports uniform. During the spin cycle, water mixed with fine mud particles moved outward through the holes of the drum. However, some very fine particles still remained on the clothes.

His sister wondered why centrifugation could not completely remove all dirt.
 
1. ​Which factor most directly affects the efficiency of centrifugation?
 
2. ​If the drum rotates very slowly, the separation process will be less effective. Why?
 
3.​ Why does water leave the drum during spinning?