Question:medium
Two spherical soap bubbles of radii '$a$' and '$b$' in vacuum coalesce under isothermal conditions. The resulting bubble has a radius equal to}
Two spherical soap bubbles of radii '$a$' and '$b$' in vacuum coalesce under isothermal conditions. The resulting bubble has a radius equal to}
Show Hint
When two soap bubbles coalesce isothermally in a vacuum, the total surface area is conserved, leading to the relation $R^2 = r_1^2 + r_2^2$.
Updated On: Apr 28, 2026
- a + b
- \frac{a+b}{2}
- \sqrt{a^2 + b^2}
- \frac{a+b}{ab}
Show Solution
The Correct Option is A
Solution and Explanation
Was this answer helpful?
0
Top Questions on Fluid Mechanics
- Water flows through a horizontal pipe with a velocity of 2 m/s. The cross-sectional area of the pipe reduces to half. What is the velocity of water in the narrower section?
- BITSAT - 2025
- Physics
- Fluid Mechanics
- Consider a velocity field \( \vec{V} = 3z \hat{i} + 0 \hat{j} + Cx \hat{k} \), where \( C \) is a constant. If the flow is irrotational, the value of \( C \) is (rounded off to 1 decimal place).
- GATE ME - 2025
- Fluid Mechanics and Thermal Sciences
- Fluid Mechanics
A pitot tube connected to a U-tube mercury manometer measures the speed of air flowing in the wind tunnel as shown in the figure below. The density of air is 1.23 kg m\(^{-3}\) while the density of water is 1000 kg m\(^{-3}\). For the manometer reading of \( h = 30 \) mm of mercury, the speed of air in the wind tunnel is _________ m s\(^{-1}\) (rounded off to 1 decimal place).
- GATE ME - 2025
- Fluid Mechanics and Thermal Sciences
- Fluid Mechanics
Consider a velocity field \( \vec{V} = 3z \hat{i} + 0 \hat{j} + Cx \hat{k} \), where \( C \) is a constant. If the flow is irrotational, the value of \( C \) is (rounded off to 1 decimal place).
- GATE ME - 2025
- Fluid Mechanics and Thermal Sciences
- Fluid Mechanics
- Want to practice more? Try solving extra ecology questions todayView All Questions