Q. There are two (narrow) capillary tubes T1 and T2 with lengths l1 and l2 and radii of cross-section r1 and r2 respectively.The rate of water under a pressure difference P through tube T1 is 8cm3/sec.What will be the rate of flow when the two tubes are connected in series and pressure difference across the combination is same as before(= p) if l1 = 2l2 and r1 = r2?

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Solution:


For composite tube