Energy
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7. Forms of energy. Internal energy and thermal energy

Figure 6.6
- INTERNAL ENERGY is the energy that includes all the forms of energy that exists inside a body.
It´s closely related to thermal energy, which makes up most of a body´s internal energy.
Internal energy includes energy on a microscopic scale and It is the sum of all the microscopic energies such as kinetic energy and potential energy from intermolecular interaction.





Figure 6.7
- THERMAL ENERGY, results from kinetic energy of all the molecules of a substance. A hot tea kettle has more thermal energy than a cold one.

Objects that feel warm are emitting thermal energy, and the transfer of thermal energy causes changes in temperature.

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