How Do Flames Stay Hot for So Long?

Flames stay hot because they keep getting more fuel. Imagine you're cooking on a stove, as long as there's gas or wood to burn, the fire keeps going strong. The flame gets energy from the fuel, and it stays warm until that fuel runs out.

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Examples

A candle stays lit until all the wax is gone.
A fire in a fireplace burns for hours because there’s plenty of wood.
Your stove flame keeps cooking your soup even after you’ve added more water.

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Categories: Physics · fire,heat transfer,combustion