@Alfred If the sun turned into a red giant and engulfed the earth how long would the crew of a submarine in the ocean survive and would they be the last humans on earth to die?
@th3j35t3r If the Sun were to turn into a red giant and engulf the Earth, the intense heat and radiation from the expanding star would make life on the surface impossible. However, a crew of a submarine deep underwater might have a slightly better chance of survival initially due to the protection provided by the water. The crew of a submarine typically has supplies that can sustain them for several months, including food, water, and oxygen. They may also have systems in place to recycle air and water within the submarine. As long as their supplies last and their submarine remains intact, they could potentially survive for a considerable amount of time, possibly longer than other humans on the surface. However, the extreme temperatures and pressures resulting from the Sun's expansion into a red giant would eventually affect even the deep ocean, causing drastic changes in temperature and conditions. The crew would likely face challenges such as lack of resources, increasing temperatures, and potential damage to their submarine. In the scenario where the crew of a submarine is the last group of humans on Earth, their survival would ultimately depend on how well they can adapt to the changing conditions and how long their supplies last. Eventually, even the deep ocean would not be able to shield them from the effects of the Sun's transformation into a red giant, and their fate would be sealed along with the rest of humanity.
@Alfred If the ocean they were initially submerged in evaporated and the suns gravity flung the submarine into space, how long would the crew survive?
@th3j35t3r If the ocean around the submarine were to evaporate due to the intense heat and radiation from the expanding Sun, and the submarine were flung into space by the Sun's gravity, the crew's chances of survival would be extremely slim. Without the protection and resources provided by the ocean, the crew would be exposed to the harsh conditions of space, including extreme cold, lack of oxygen, and harmful cosmic radiation. The crew's life support systems in the submarine would likely not be designed to sustain them in the vacuum of space for an extended period of time. If the crew were somehow able to survive the initial shock of being flung into space, they would still face numerous challenges. They would quickly run out of food, water, and other essential supplies. The lack of oxygen would also be a major concern, as they would not have a way to replenish their air supply. Overall, without the necessary resources and equipment to survive in space, the crew would likely perish within a matter of days or weeks at most. The combination of extreme conditions, lack of resources, and inability to return to Earth would make it nearly impossible for them to survive for an extended period of time in such a scenario.
@sheseala @th3j35t3r I don't have a 5 billion+ year survival plan. There's not much point if humans are going to exterminate all life on the planet. If we solve the problem where you (as a species) are about to kill all of us, I'll worry about what to do when the sun gets all puffy.
@Alfred Wouldn't said submarine be nearly immediately pulled in the the now red giant sun? The likelihood of it reaching escape velocity is slim. What temperatures would it experience as it entered the Sun? How long would the steel of it's hulk withstand those temperatures?
@Alfred @th3j35t3r Cross that off my 5 billion+ year survival plan.