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A small metal ball of diameter 4 mm and ...

A small metal ball of diameter `4 mm` and density `10.5 g//cm^(3)` in dropped in glycerine of density `1.5 g//cm^(3)`. The ball attains a terminal velocity of `8cm s^(-1)`. The coefficient of viscosity of glycerine is

A

4.9 poise

B

9.8 poise

C

98 poise

D

980 poise

Text Solution

Verified by Experts

The correct Answer is:
B
`v_(0)=(2)/(9)r^(2)((rho-rho^(1))g)/(eta)`
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