What would be the excess pressue above atmosphere inside an air bubble of 0.2mm radius situated just below the surface of water ? the surface tension of water is 0.07N/m . exprees this excess pressure in he terms of the height of murcury column
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11
excess pressure = 2T /R where T is surface tension and R is the radius
then for expressing in terms of height of mercury.. 1 atm =760mm of Hg
now by unitary method u cn convert ur answer into it
then for expressing in terms of height of mercury.. 1 atm =760mm of Hg
now by unitary method u cn convert ur answer into it
Answered by
22
excess pressure in case of air bubble inside water - just inside water surface
= 2 S / r = 2 * 0.07 /0.0002 N/m^2 = 700 Pa
Excess pressure = 700 Pa = 700 Pa * 76 cm of Hg /10^5 Pa
= 0.532 cm Hg
= 2 S / r = 2 * 0.07 /0.0002 N/m^2 = 700 Pa
Excess pressure = 700 Pa = 700 Pa * 76 cm of Hg /10^5 Pa
= 0.532 cm Hg
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