which best describes thermal energy?\nit is the difference between internal energies of two or more…

which best describes thermal energy?\nit is the difference between internal energies of two or more substances.\nit is the sum of internal energies of two or more substances.\nit is the portion of internal energy that can be transferred from one substance to another.\nit is the portion of potential energy that can be transferred from one substance to another.

which best describes thermal energy?\nit is the difference between internal energies of two or more substances.\nit is the sum of internal energies of two or more substances.\nit is the portion of internal energy that can be transferred from one substance to another.\nit is the portion of potential energy that can be transferred from one substance to another.

Answer

Brief Explanations:

Thermal energy is a form of internal energy. It specifically refers to the part of internal energy that can be transferred between substances. Potential energy is a different form of energy (related to position, for example), so the option with potential energy is incorrect. The difference or sum of internal energies of multiple substances does not define thermal energy. Thermal energy is about the transferable portion of internal energy.

Answer:

It is the portion of internal energy that can be transferred from one substance to another.