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Calculate the speed a spherical rain drop would achieve falling from 4.2 km (a) in the...

Calculate the speed a spherical rain drop would achieve falling from 4.2 km (a) in the absence of air drag (b) with air drag. Take the size across of the drop to be 4.2 mm, the density to be 1.00×103??/?3 , and the surface area to be ??2 . Additionaly: the density of air is 1.21??/?3 , and the drag coefficient for the spherical drop is 0.45.

a) In the absence of air drag

b) with air drag

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