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Two capillary tubes AB and BC are joined end to end at B. AB is 16 cm long and of diameter 0.4 cm. BC is 4 cm long and of diameter 0.2 cm. The compos- ite tube is held horizontally as in Poiseuille's experiment, with A connected to a vessel of water giving a constant head of 3 cm and C open to air. Calculate the pressure difference between B and C. |
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