Two soap bubbles of radii R₁ and R₂, with R₁ smaller than R₂, are connected by a narrow tube. Both bubbles are made from the same soap solution and are initially at the same temperature. What happens immediately after the connection is opened?
Options

Question

Two soap bubbles of radii R₁ and R₂, with R₁ smaller than R₂, are connected by a narrow tube. Both bubbles are made from the same soap solution and are initially at the same temperature. What happens immediately after the connection is opened?

Options

G1 Physics · Accepted Answer

For a soap bubble, ΔP = 4S/R. Therefore the smaller bubble has the larger excess pressure. Since R₁ < R₂, we have P₁ > P₂. When the connecting tube is opened, air initially flows from the higher-pressure smaller bubble toward the lower-pressure larger bubble. Correct option: B.