4min chapter

Sean Carroll's Mindscape: Science, Society, Philosophy, Culture, Arts, and Ideas cover image

AMA | March 2022

Sean Carroll's Mindscape: Science, Society, Philosophy, Culture, Arts, and Ideas

CHAPTER

The Second Law of Thermodynamics

The second law of thermo dynamics applies when you have a closed system. But there are ways to have systems spontaneously decrease in entropy. In an expanding universe, the total energy of stuff, of matter and radiation, et cetera, is not a constant number because space time is changing underneath it. There's no single way of thinking about energy, ecause there're ifferent ways of doing it.

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