The lower end of a capallary tube of diameter 2.50 mm is dipped 8.00 cm below the surface of water in a beaker .What is the pressure required in the tube in order to blow a hemispherical bubble at the end in water ? The surface tension of water at temperature of the experiments is `7.30xx10^(-2)Nm^(-1)`. 1 atmospheric pressure `1.01xx10^(5)Pa`. Density of water `=1000kg//m^(3),g=9.80ms^(-2)`.Also calculate the excess pressure .

Explanation

`P_(i)-P_(o)=116.8Pa`