Soap Bubble Surface Tension Pressure · CAP 2024 #2

Physics · fluid-mechanics

Problem

Surface tension is defined as the force per unit length acting on the surface of a liquid. Due to the presence of it, the surface of a liquid can be thought of as having a "stretchy" property like a piece of rubber. Assume that a soap bubble of radius R has a surface tension T. What is the difference in pressure between the pressure inside the bubble and the atmospheric pressure? Note that a soap bubble has both an inner and an outer surface. A. T2R\frac{T}{2R} B. TR\frac{T}{R} C. 2TR\frac{2T}{R} D. 4TR\frac{4T}{R} E. 8TR\frac{8T}{R}

Related theory

Browse the problem library