Calculate excess pressure inside an air bubble of radius 1.0 mm and just below the surface of water. What will be the pressure inside the soap bubble?

Calculate excess pressure inside an air bubble of radius 1.0 mm and ju

1.	Calculate excess pressure inside an air bubble of radius 1.0 mm and just below the surface of water. What will be the pressure inside the soap bubble?
Answer» Solution :GIVEN `r=1 xx 10^(-3)m` `T=0.072 Nm^(-1)` EXCESS PRESSURE `=(2T)/(r)` (because it has only the inner suface= `(2 xx 0.072)/(1 xx 10^(-3))` `=144 Nm^(-2) =0.00144 xx 10^(5)` Net pressure INSIDE the BUBBLE is `=P_(0)+(2T)/(r)=1.013 xx 10^(5)+0.00144+10^(5)` Net pressure `=1.0144 xx 10^(5)Nm^(-2)`