Boiling water in paper cup; cup does not burn.

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(C)Properties of Heat and Matter - C+15: Conduction

Boiling water in paper cup; cup does not burn. The paper cup is filled 2/3 full with water, above the point where the metal ring holder touches the cup. The cup fits tightly in the ring holder. When a flame is applied to the bottom of the cup, the cup Bunsen Burner Cup is 2/3 filled with water does not burn. The cup burns above the water line. CONDUCTION.
UCB Index: 
C+15+1
PIRA Index: 
4B50.20
Demo Diagram: 

UCB Taxonomy:

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C+15+2 Copper gauze over flame; gas burns only above gauze.