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An air bubble of radius 1 cm is rising f...

An air bubble of radius 1 cm is rising from the bottom of a long liquid column. If its terminal velocity is 0.21 cm. `s^-1`, calculate the coefficient of viscosity. Of the liquid. Given that the density of the liquid is 1.47 g. `cm^-3`. Ignore the density of air.

Text Solution

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Coefficient of viscosity of the liquid,
`eta=1/2. (r^2(rho-sigma)g)/(v)`
[Here, `r=1 cm, v=-0.21 cm. s^-1, rho=0, sigma=1.41 g. cm^-3`]
`=2/9xx((1)^2(0-1.47)xx980)/(-0.21)=1524.4` poise.
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