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4. For a microfluid channel with a length of 1 mm, and a square cross-sectional area of 20 um?, find the volumetric flow and

4. For a microfluid channel with a length of 1 mm, and a square cross-sectional area of 20 um?, find the volumetric flow and average flow speed if one end of the channel is subjected to a water column that is 5 m tall. The other end is connected to atmosphere pressure. The dynamic viscosity of water is 0.001002 kg/(m. s).

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