Question

A narrow capillary tube is dipped 10 cm below water surface and a liquid bubble of radius 2 mm formed at the lower end by blowing air through the tube. a. Calculate the excess pressure due to surface tension. b. What is the pressure required in the tube in order to blow a hemispherical bubble at its end in water? The surface tension of water at temperature of the experiment is 7.30xx10^(-2) N//m. 1 atmospheric pressure = 10^(5) Pa, density of water = 1000 kg//m^(3)

Answer 1

Answer:

1.01146 ×105

Sln -

Excess pressure = 2T/r = 146 Pa

pressure h below the surface = </span><i>p</i><span>0 + pgh

∴ P = (P0 + pgh) + 2T/r

=1×105+103×1010×0.1

+2×1037.3×10−2

=1×105+103+146

=1×105+1146

=1.01146×105

Answer 2

Answer:

ABOVE ANSWER AS FAR IS CORRECT

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