Q.

The terminal velocity of a rain drop of radius r falling down in the atmosphere is

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a

2r2ρ−ρ0g9η

b

2r2ρ+ρ0g9η

c

2r2ρ−ρ0gη

d

2r2ρ+ρ0gη

answer is A.

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Detailed Solution

V=29⋅r2ρ−ρ0gη
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