Question

An air bubble of radius 1 cm rises through a liquid column with velocity 0.002 m/s. Find the coefficient of viscosity of the liquid neglecting th density of air. The density of liquid is 1400 kg m-³?​

Answer 1

Answer:

Given,
Terminal velocity=3.5 mm/s
9η
2r
2
(ρ)g
​
=3.5 mm/s
9η
2×10
−4
×1.75×10
3
×9.8
​
=3.5×10
−3
m/s
η=
9×3.5
2×1.75×10
2
×9.8
​
Ns/m
2

η=108.88 Ns/m
2

η≈109 Ns/m
2

Explanation:

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