Gravitational Energy is not a part of the internal energy.

Internal energy refers to the total energy possessed by the particles within a system. It includes various forms of energy, such as kinetic energy, potential energy, and chemical bond energy. However, gravitational energy is not considered a part of the internal energy.

Explanation:

Internal Energy:
Internal energy is the sum of all the energies associated with the motion and position of the particles within a system. It includes both kinetic energy, which is the energy associated with the motion of the particles, and potential energy, which is the energy associated with the position of the particles.

Gravitational Energy:
Gravitational energy, on the other hand, is the energy associated with the position of an object in a gravitational field. It is the potential energy stored in an object due to its height relative to a reference point. Gravitational energy depends on the mass of the object, the acceleration due to gravity, and the height of the object.

Difference between Internal Energy and Gravitational Energy:
The key difference between internal energy and gravitational energy is the source of energy. Internal energy primarily arises from the motion and interactions of particles within a system. It is related to the microscopic properties of the system. On the other hand, gravitational energy arises from the position of an object in a gravitational field. It is related to the macroscopic properties of the system.

Conclusion:
In summary, gravitational energy is not considered a part of the internal energy. Internal energy primarily arises from the motion and interactions of particles within a system, while gravitational energy is associated with the position of an object in a gravitational field.