b) Two different capillary tubes of radius 0.5 mm are dipped into soapy water of density 900 kg/m³. The soapy water rises up in straw 1 but drops below the surface in straw 2 as shown in the diagram. If the difference in the two levels is 1.85 cm. The surface tension of the soapy water is 25 mN/m and the angle of contact for straw 1 is 30°. Calculate the angle of contact for straw 2 in degree. [Answer in 2 significant figures]

b) Two different capillary tubes of radius 0.5 mm are dipped into soapy water of density 900 kg/m³. The soapy water rises up in straw 1 but drops below the surface in straw 2 as shown in the diagram. If the difference in the two levels is 1.85 cm. The surface tension of the soapy water is 25 mN/m and the angle of contact for straw 1 is 30°. Calculate the angle of contact for straw 2 in degree. [Answer in 2 significant figures]

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter15: Fluid Mechanics

Section: Chapter Questions

Problem 27P

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