Why does water heated in a cup in the microwave boil over when the tea bag is put into it?!
Why does water heated in a cup in the microwave boil over when the tea bag is put into it?
Answers:
The Water has been Superheated from the Microwave.
Microwaves send Energy into the Middle of an Object, unlike Heat which works from the Outside-in.
The Center can get a Lot Hotter than the Edges. It forms a "Bubble" or Zone with More Energy than the Surrounding Water. This will Stay for a While if Left alone.
When you Break the Surface Tension, it Suddenly Boils as the Hotter Water is Released.