A rain drop of radius 0.3mm has the terminal velocity in air 1m/s. If η=18×10−5dyne cm−2s. The viscous force on the rain drops is

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A rain drop of radius 0.3mm has the terminal velocity in air 1

Question

A rain drop of radius $0.3 mm$ has the terminal velocity in air $1 m / s$ . If $η = 18 \times 10^{- 5} d y n e$ $c m^{- 2} s$ . The viscous force on the rain drops is

10^{- 6}

10^{- 5}

10^{- 4}

10^{- 2}

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A rain drop of radius

0.3 mm

has the terminal velocity in air

1 m / s

. If

η = 18 \times 10^{- 5} d y n e

c m^{- 2} s

. The viscous force on the rain drops is

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Question Text

A rain drop of radius

0.3 mm

has the terminal velocity in air

1 m / s

. If

η = 18 \times 10^{- 5} d y n e

c m^{- 2} s

. The viscous force on the rain drops is