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प्रश्न
An air bubble of radius 0.2 mm is situated just below the water surface. Calculate the gauge pressure. Surface tension of water = 7.2 × 10−2 N/m.
उत्तर
Given:
R = 2 × 10−4 m,
T = 7.2 × 10−2 N/m,
p = 103 kg/m3
To find:
Calculate the gauge pressure.
Solution:
The gauge pressure inside the bubble = `"2T"/"R"`
= `(2(7.2xx10^-2))/(2xx10^-4)`
= 7.2 × 102
= 720N/m2 (or 720Pa)
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