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A gas bubble of diameter 002 m rises ste...

A gas bubble of diameter 002 m rises steadily at the rate of` 2.5 10^(-2) ms^(-1) ` through a solution of density `2.5 xx 10^(3) kg m ^(-3) `. Calculate the coefficient of viscosity of the solution. Neglect the density of the gas.

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The correct Answer is:
` 2.18 xx 10 ^(-2) Ns m ^(-2)`
` eta = 2 xx (0.01) ^(2) xx 2.5 xx 10 ^(3) xx 9.8//9 xx 2.5 xx10 ^(-2) = 2.18 xx 10 ^(-2) Nsm ^(-2)`
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