EAMCET Engineering 2004 Solved Paper

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 =7×10−2N∕m Density of water =103‌kg∕m3. Acceleration due to gravity =10m∕ s2 )