Surface TensionHardQuestion 30976
Question
Falling raindrops are spherical because:
- AAir resistance forces sphere shape
- BSurface tension minimises surface area for given volumeCorrect
- CWater has uniform density
- DClouds are round
Correct answer
Surface tension minimises surface area for given volume
Explanation
For a given volume, sphere has minimum surface area. Surface tension minimises surface energy → spherical shape.