Question

write the principles of winnowing​

Answer 1

Answer:

Material granules movement speed and direction in the airflow mainly depends on relations between airflow effort P and granules weight G. 

When P＜G, material has accelerated movement downward; 

When P＞G, material has accelerated movement upward;

When P=G, material stays in the suspension state. At this moment, the airflow movement speed is the suspension speed of the material. 

Answer 2

ANSWER:::

Winnowing is a farming method developed by acient people for separating grain from chaff ...... In its simplest form it involves throwing the mixture into thw air so that the windblows away the lighter chaff . The heaviergrain fallback down for recovery....

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