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What should be the gauge pressure inside an air bubble of 0.2 mm radius situated below the surface of the water ? Surface Tension of water is 0.07 N/m

What should be the gauge pressure inside an air bubble of 0.2 mm radius situated below the surface of the water ? Surface Tension of water is 0.07 N/m

Grade:12

1 Answers

Arun
25750 Points
6 years ago
Pi-P​o = 2T / r 

Where Pi= ​The pressure inside the bubble 

Po= The pressure outside the bubble = Here when er talk about the surface the pressure can be considered to be zero 

T = surface tension , r = radius of the bubble= 0.2 mm = 0.2/1000 m  

on substituing the values  = P = 2 x 0.07 x1000 / 0.2 = 700 N /m²
= 700 Pa

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