What is Entropy and Why is it Useful? [Science Video]

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There’s a concept that’s crucial to chemistry and physics. It helps explain why physical processes go one way and not the other: why ice melts, why cream spreads in coffee, why air leaks out of a punctured tire. It’s entropy, and it’s notoriously difficult to wrap our heads around. Jeff Phillips gives a crash course on entropy.

Now that you know what entropy is, here’s a t-shirt for you:

[TED Ed | Entropy isn’t what it used to be]





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