An air bubble of radius 5mm rises through a vat of syrup at a steady speed of 2mm/s. If the syrup has a density of 1.4 x103 kg/m3, What is its viscosity ?

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1.15 kg/m/s

15 kg/m/s

2.25 kg/m/s

38.1 kg/m/s

answer is D.

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Detailed Solution

terminal velocity v=2 r2dl g9η here density of air is neglected η=2 r2dl g9v substituting the values we get η=38.1kg/m/s

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