>>11116466> Wait a guy is alive and after 1 sec he is deadTrue death is medically defined as the permanent failure of brain activity. At which point the return of brain activity is no longer possible is often uncertain, so the transition is indefinite just like the transition between species barring cases where people get gibbed by explosions or large-caliber firearms.
> What's the difference in his body?The body has been harmed in such a manner that the brain is no longer able to continue functioning normally. This could be something externally unremarkable like a brain injury caused by falling over or it could be something obvious and dramatic like being bisected.
> Where has the energy gone to?If the brain is dead but the rest of the body is alive, the body will use energy from food to perform standard metabolic processes. If the whole body is dead, the cells will run out of chemical energy pretty quickly and then start destroying themselves via autolysis, and whatever thermal energy is present will slowly reach equilibrium with the environment. The remaining energy stored in the body’s chemical bonds will be exploited by a host of bacteria and possibly fungi, insects, and other scavengers.
