Energy _______________________________________________________________________________________________________________________________________________________________________________________________________________________ 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 includesenergy 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.