Summaryhe redshift of long distances confirms the "limit of oblivion"; when time intervals expand so much, hardly any information can be obtained from that distance.Is gravitational force a measure of potential energy? A black hole or a neutron star exhibits a great deal of gravitational force . They have lost the potential energy of the masses they contain relative to each other; it has been converted into pressure. On the other hand, there is no gravity in a hollow sphere. But it still has potential energy. It could shrink by releasing energy. Potential energy cannot be removed without affecting its originators. It therefore has no viscosity and no inherent inertia. Therefore, it cannot be detected locally. Is there a perpetual motion machine of the second kind? No, it's similar to the statement "Only stupidity is immortal" if the world is to last forever. Everything must be mortal and can also be justified by the second law of thermodynamics. If the world is to last forever, neither energy nor matter can be lost. The term "isentropic world" doesn't mean that no energy is exchanged. In a sufficiently large sphere, just as much heat enters as flows out through the surface. Thus, the overall average entropy remains constant. Ludwig Resch |