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One end of a uniform glass capillary tube of radius r=0.025cm is immersed vertically in water to a depth h=1cm. The excess pressure in N/m2 required to blow an air bubble out of the tube: (Surface tension of water=7×102N/m Density of water=103kg/m3 Acceleration due to gravity =10m/s2)

(a)0.0048×105(b)0.0066×105(c)1.0048×105(d)1.0066×105

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