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Milk has a viscosity of about 2.1 cp at 20 C. The density of whole milk...

Milk has a viscosity of about 2.1 cp at 20 C. The density of whole milk is about 1.03 g/cc and milk fat (cream) has a density of about .93 g/cc and the average drop of cream has an 8 µ diameter. Use Stokes’s law to calculate how long it will take a drop of cream to rise 10 cm. ***the correct answer is D, but I don't understand how***

A. 12 hr 40 min

B. 10 hr 45 min

C. 24 hr 12 min

D. 16 hr 45 min

E. 6000 sec

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Answer #1

g is acceleration due to gravity and its balue is 9.8 m/s2

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