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A milkshake has viscosity of 0.60Pa⋅s. To drink this shake through a straw of diameter 0.56...

A milkshake has viscosity of 0.60Pa⋅s. To drink this shake through a straw of diameter 0.56 cm and length 22 cm, you need to reduce the pressure at the top of the straw to less than atmospheric pressure.

Part A

If you want to drain a 560mL shake in 1.0 minutes, what pressure difference is needed? You can ignore the height difference between the top and the bottom of the straw.
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Answer #1

From Poiseuilles law V Apr 891 The pressured difference is, Penin P = 4 8(0.6) (0.22)(560x104) T(0.28x102) (1x60) = 5.104094

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