Question

sand and saw dust cannot be separated by hand picking​

Answer 1

Answer:

yes because it us impossible as the dust is too small

but there is a process named as winnowing through which these two can be saperated

Answer 2

Answer:

Because those are having more finer particles. So they cannot be separated by hand picking.

As the saw is lighter then they can be separated by Wind (Sowing).

hope it helps......