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A soap bubble of radius 38.2 mm is blown on the end of a narrow tube of length 11.2 cm and internal diameter 1.08 mm. The other end of the tube is exposed to the atmosphere. Find the time taken for the bubble radius to fall to 21.6 mm. Assume Poiseuille flow in the tube. (For the surface tension of the soap solution use 2.50 × 10 –2 N/m; the viscosity of air is 1.80 × 10 –5 N∙ s/m 2 .)

A soap bubble of radius 38.2 mm is blown on the end of a narrow tube of length 11.2 cm and internal diameter 1.08 mm. The other end of the tube is exposed to the atmosphere. Find the time taken for the bubble radius to fall to 21.6 mm. Assume Poiseuille flow in the tube. (For the surface tension of the soap solution use 2.50 × 10–2 N/m; the viscosity of air is 1.80 × 10–5 N∙ s/m2.)

Grade:11

1 Answers

Kevin Nash
askIITians Faculty 332 Points
8 years ago
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