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MHT CET Physics question

PhysicsMechanical Properties of FluidsMHT CET

One end of a uniform glass capillary tube of radius cm is immersed vertically in water to a depth cm. The excess pressure (in ) required to blow an air bubble out of the tube (Given, surface tension of water , density of water and acceleration due to gravity )

Answer: (B)

Solution

Excess pressure needed \dfrac{2T}{r}10^{3}\dfrac{2×7×10^{-2}}{2.5×10^{-4}}$=100+

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Question ID VK-062122