Show that when a liquid 1ows through a narrow tube under pressure difference p between the ends,
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V = (πa4/8ηL)p,
where η is the viscosity; L is the length; a is the radius. Assume that the flow is laminar and that the flow velocity at the walls of the tube is zero.
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Consider a cylindrical region with radius r a within the tube concentric with th...View the full answer
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