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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > A glass tube of 1mm bore is dipped vertically into a container of mercury with its lower end 2 cm below the mercury surface. What must be the guage pressure of air in the tube in order to blow a hemispherical bubble at its lower end? Given density of mercury = 13600 kgm^−3 and surface tension of mercury = 35×10^−3 N m^−1.

A glass tube of 1mm bore is dipped vertically into a container of mercury with its lower end 2 cm below the mercury surface. What must be the guage pressure of air in the tube in order to blow a hemispherical bubble at its lower end? Given density of mercury = 13600 kgm^−3 and surface tension of mercury = 35×10^−3 N m^−1.

Calculate the difference h in water levels in two commnicating capillary tube of radius 1 mm and 1.5 mm. Surface tension of water=0.07Nm−1