What Are the Sources of Heat Energy?

Answer

The sun is a part of our solar system. Thus, it is a natural source of heat energy. Sunlight is important for the existence of all living organisms on the planet. This form of heat energy is also called solar energy. The heat energy that is found
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Q&A Related to "What Are the Sources of Heat Energy?"
radioactivity.
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( ′hēt ′sörs ) (thermodynamics) Any device or natural body that supplies heat.
http://www.answers.com/topic/heat-source
Nuclear fusion at it's core. Heat radiates, and we perceive this as light. As the sun formed, initially as gas clouds collapsed due to gravity to form a dense gas cloud, the pressure
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