There is no such thing as global conservation of energy in general relativity unless special requirements are put on the space-time.nomadreid said:But isn’t another objection the conservation of mass-energy?
Orodruin said:There is no such thing as global conservation of energy in general relativity unless special requirements are put on the space-time.
The conservation of mass-energy is a fundamental principle in physics that states that the total amount of mass and energy in a closed system remains constant over time. This means that in any process, the total mass and energy before the process is equal to the total mass and energy after the process.
In time travel scenarios, the conservation of mass-energy still applies. This means that the total mass and energy in the universe must remain constant, even if objects or individuals are traveling through time. This can be seen in the "grandfather paradox," in which a person travels back in time and prevents their own birth, thus creating a paradox and violating the conservation of mass-energy.
One theory is that time travel itself creates a new timeline or parallel universe, in which the laws of physics, including the conservation of mass-energy, are maintained. Another theory is that time travelers are subject to the laws of the new time period they enter, and must follow the rules of that time in order to maintain the conservation of mass-energy.
Currently, there is no scientific evidence to suggest that the conservation of mass-energy can be violated in any scenario, including time travel. However, some theories and hypotheses suggest that it may be possible to manipulate space-time in a way that allows for time travel without violating the conservation of mass-energy.
The conservation of mass-energy is a fundamental principle in physics, and any potential violations of it would have significant implications for our understanding of the universe and the laws of physics. Time travel is a complex and hypothetical concept, and further research and advancements in technology are needed to fully understand its implications for the conservation of mass-energy.