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science

Grade-4-

Easy

Question

Coal is the source of _________ energy.

Nuclear energy
Electrical energy
Chemical energy
Thermal energy

hint Hint:

Coal is the source of thermal energy.

The correct answer is: Thermal energy

Thermal energy can be defined as the energy that is contained within the system which is due to its temperature.

Thermal energy is due to the flow of heat within the system.

This flow of energy in different system and its working principle is called thermodynamics.

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