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Candle wax is a form of chemical energy.
Heat and light energy.
The burning of a candle is spontaneous because it does not require continual input of energy.
light energy
The Light of a candle is part of the electromagnetic spectrum, so it is electromagnetic energy. It is also called radiant energy. A candle, however, can emit others kinds of energy like heat, light, sounds, kinetic energy (that makes the air move due to convection) and so on.
Candle wax is a form of chemical energy.
Potential energy is in an unlit candle, which is converted to heat energy, once the candle is lit.
Heat and light energy.
The chemical energy stored in the candle wax.
The burning of a candle is spontaneous because it does not require continual input of energy.
light energy
energy input
Yes, part of physics is studying the transfer of energy from one form to another. Within the candle is chemical potential energy (think about how the candle has to burn in scented candles), when a fire source comes near enough to the candle the chemical potential energy is transferred into thermal energy (heat energy) and radiant energy (visible light energy)
The Light of a candle is part of the electromagnetic spectrum, so it is electromagnetic energy. It is also called radiant energy. A candle, however, can emit others kinds of energy like heat, light, sounds, kinetic energy (that makes the air move due to convection) and so on.
No. -- Mass leaves the candle in the form of hot gases and soot, and there's always some of it left in the puddle of melted wax under the candle. -- Oxygen combines with the hydrocarbons in the candle material and the fibers in the wick, releasing chemical energy that leaves the candle in the form of heat and light.
When you light a candle, it burns the wax. That is chemical energy. The thermal energy is produced as the lighted wick continue to burn the wax. It also gives out light as it burns.
Energy. Given that energy can be neither created nor destroyed, the total energy output equals that input, and in a system the ratio of that output energy desired to the total input gives the efficiency.