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Calculate the rate at which water flows ...

Calculate the rate at which water flows through a capillary tube of length 0.5m with an internal radius of 1mm. Coefficient of viscosity is `1.3xx10^(-3)kg//m-s`. The pressure head is 20 cm of water.

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From Poiseuille.s formula `V=(piPr^(4))/(8etal)`
`=(3.14xx20xx10^(-2)xx1000xx9.8xx(10^(-3))^(4))/(8xx1.3xx10^(-3)xx0.5)=7.4xx10^(-8)m^(3)s^(-1)`.
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