By Sublimation, you can separate salt water from sand !!
and by Evaporation, salt can be separated from water !!
so all three are separated by these two process !!
Answer:
Explanation:
Freshwater resources are not evenly distributed around the planet because there are some places where precipitation doesn't take place like deserts or tundra's. In rainforests there is an abundant reservoir of water.
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Answer:

Explanation:
Angular momentum, L = m v r
areal velocity = 
according to kepler's 2nd law

since, we know that

areal velocity= 
now substituting value of v in areal velocity we get

hence from above equation of rate of change of area swept i.e. areal velocity is proportional to 
4.75
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