Learn about thermal energy, its definition, and how it relates to work and energy on Khan Academy.

Thermal energy is the total kinetic energy of particles in a substance, resulting from their random motion.

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This video explains the concept of heat capacity in thermodynamics.

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Lisa. Lisa is a K-8 Math Specialist in Aventura, Florida who is passionately devoted to helping children and adults make sense of math. She serves on the editorial panel for the National …