1.

One end of a uniform glass capillary tube of radius r = 0.025 cm is immersed vertically in water to a depth h = 1 cm. The excess pressure in N/m^2 required to blow an air bubble out of the tube is : [Surface tension of water = 7 xx 10^(-2) Nm, Density of water = 10^3 kg m^(-3) , Acceleration due to gravity = 10ms^(-2)]

Answer»

`0.0048 XX 10^5`
`0.0066 xx 10^5 `
`1.0018 xx 10^5 `
`1.0033 xx 10^5 `

ANSWER :B


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