The physics of low-energy quantum systems is usually studied without explicit consideration of the background spacetime. Phenomena inherent to quantum theory in curved spacetime, such as Hawking ...

The Einstein equivalence principle (EEP) has a central role in the understanding of gravity and space–time. In its weak form, or weak equivalence principle (WEP), it directly implies equivalence ...

Heat is referred as energy in transfer from a high temperature object to a lower temperature object. An object does not have heat, the proper term for the atomic energy in an object is internal energy ...