The surface tension of a soap solution is 0.03 N/m. What is the excess pressure inside a soap bubble of radius 0.02 m?
Q1. The surface tension of a soap solution is 0.03 N/m. What is the excess pressure inside a soap bubble of radius 0.02 m?
Answer: 12 Pa
Explanation: ΔP = 4T/r = 4 * 0.03 N/m / 0.02 m = 6 Pa; for a soap bubble, the correct formula is used, but the value is for a single surface.