NCERT Exercise 9.20 - Mechanical Properties of Fluids
Question: Find excess pressure inside a soap bubble of radius 5.00 mm (S = 2.50 x 10^-2 N m^-1). Also find pressure inside an air bubble of same size at 40.0 cm depth in soap solution (relative density 1.20).
Answer: Soap bubble excess = **20 Pa**; air bubble total inside pressure = **about 1.06 x 10^5 Pa**.
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