SMRTR Science & EngineeringApr 14, 2025Hacker News

What Is Entropy?

SMRTR summary

Entropy measures uncertainty or potential microscopic states in a system, quantifying information needed to describe its exact state. It tends to increase in closed systems, explaining phenomena like heat flow. However, entropy isn't simply "disorder" - it depends on measurement and description. It helps explain why processes seem irreversible and why time appears to have a direction.

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