The excess pressure inside a soap bubble of radius 2 cm is (surface tension of soap solution = 0.03 N/m)
A. 1.5 Pa
B. 3 Pa
C. 6 Pa
D. 12 Pa
A. 1.5 Pa
B. 3 Pa
C. 6 Pa
D. 12 Pa
Best answer
Answer: C. 6 Pa
A soap bubble has two surfaces: \(\Delta P=\frac{4T}{r}=\frac{4\times0.03}{0.02}=6\) Pa.
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