Discussion
State whether the following is true or false.
A falling raindrop is shaped like a teardrop.
Answer: B
Correct answer: False
The teardrop shape is an artistic convention with no basis in the physics. A small drop is held spherical by surface tension; a larger one is flattened on its underside by the air pressing on it as it falls, giving a shape like a hamburger bun with a rounded top and a flat or slightly dimpled base. Beyond about 5 mm the distortion grows until the drop breaks apart, which is what limits raindrop size.
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