B31 By considering the work done per unit area in increasing the surface area of a bubble blown in a liquid, or otherwise, derive an expression for the excess pressure p inside a bubble of radius r. Density of quid The diagrams above represent glass capillary tubes dipping into a liquid. Explain why the situation represented by @ is unstable while that in (i) is stable. Use the data given in dingram () to đerive an expression for the height i to which the liquid rises, given that the angle of contact between the liquid and glass is zero. By considering intermolecular forces explain why the surface ofa liquid is different from the bulk of the liquid. Suggest why there might be a connection between the surface energies (surface ten- sions) of liquids and their normal boiling points. (L)

B31 By considering the work done per unit area in increasing the surface area of a bubble blown in a liquid, or otherwise, derive an expression for the excess pressure p inside a bubble of radius r. Density of quid The diagrams above represent glass capillary tubes dipping into a liquid. Explain why the situation represented by @ is unstable while that in (i) is stable. Use the data given in dingram () to đerive an expression for the height i to which the liquid rises, given that the angle of contact between the liquid and glass is zero. By considering intermolecular forces explain why the surface ofa liquid is different from the bulk of the liquid. Suggest why there might be a connection between the surface energies (surface ten- sions) of liquids and their normal boiling points. (L)

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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